├── .github └── workflows │ └── lint.yml ├── .gitignore ├── CONTRIBUTING.md ├── COPYING.txt ├── Makefile ├── README.md ├── a.tsv ├── b.tsv ├── bin ├── gen.py └── requirements.txt ├── c.tsv ├── d.tsv └── e.tsv /.github/workflows/lint.yml: -------------------------------------------------------------------------------- 1 | name: Lint 2 | 3 | on: [push, pull_request] 4 | 5 | jobs: 6 | lint: 7 | runs-on: ubuntu-latest 8 | steps: 9 | - uses: actions/checkout@v4 10 | - uses: actions/setup-python@v5 11 | with: 12 | python-version: "3.10" 13 | - run: pip install -r bin/requirements.txt 14 | - run: make --always-make 15 | - uses: actions/upload-artifact@v4 16 | with: 17 | name: chess-openings 18 | path: dist/ 19 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | dist/ 2 | -------------------------------------------------------------------------------- /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | Contributing 2 | ============ 3 | 4 | Opening data is in `a.tsv`, `b.tsv`, `c.tsv`, `d.tsv`, and `e.tsv`. 5 | 6 | Improvements, additions and fixes are welcome. If you have concrete 7 | suggestions, please be bold and submit the proposed changes directly as pull 8 | requests! 9 | 10 | The changes will be live on lichess.org after the next update of 11 | [scalachess](https://github.com/lichess-org/scalachess) (no fixed schedule) 12 | and the 13 | [opening explorer](https://github.com/lichess-org/lila-openingexplorer) 14 | (daily). 15 | -------------------------------------------------------------------------------- /COPYING.txt: -------------------------------------------------------------------------------- 1 | Creative Commons Legal Code 2 | 3 | CC0 1.0 Universal 4 | 5 | CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE 6 | LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN 7 | ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS 8 | INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES 9 | REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS 10 | PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM 11 | THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED 12 | HEREUNDER. 13 | 14 | Statement of Purpose 15 | 16 | The laws of most jurisdictions throughout the world automatically confer 17 | exclusive Copyright and Related Rights (defined below) upon the creator 18 | and subsequent owner(s) (each and all, an "owner") of an original work of 19 | authorship and/or a database (each, a "Work"). 20 | 21 | Certain owners wish to permanently relinquish those rights to a Work for 22 | the purpose of contributing to a commons of creative, cultural and 23 | scientific works ("Commons") that the public can reliably and without fear 24 | of later claims of infringement build upon, modify, incorporate in other 25 | works, reuse and redistribute as freely as possible in any form whatsoever 26 | and for any purposes, including without limitation commercial purposes. 27 | These owners may contribute to the Commons to promote the ideal of a free 28 | culture and the further production of creative, cultural and scientific 29 | works, or to gain reputation or greater distribution for their Work in 30 | part through the use and efforts of others. 31 | 32 | For these and/or other purposes and motivations, and without any 33 | expectation of additional consideration or compensation, the person 34 | associating CC0 with a Work (the "Affirmer"), to the extent that he or she 35 | is an owner of Copyright and Related Rights in the Work, voluntarily 36 | elects to apply CC0 to the Work and publicly distribute the Work under its 37 | terms, with knowledge of his or her Copyright and Related Rights in the 38 | Work and the meaning and intended legal effect of CC0 on those rights. 39 | 40 | 1. Copyright and Related Rights. A Work made available under CC0 may be 41 | protected by copyright and related or neighboring rights ("Copyright and 42 | Related Rights"). Copyright and Related Rights include, but are not 43 | limited to, the following: 44 | 45 | i. the right to reproduce, adapt, distribute, perform, display, 46 | communicate, and translate a Work; 47 | ii. moral rights retained by the original author(s) and/or performer(s); 48 | iii. publicity and privacy rights pertaining to a person's image or 49 | likeness depicted in a Work; 50 | iv. rights protecting against unfair competition in regards to a Work, 51 | subject to the limitations in paragraph 4(a), below; 52 | v. rights protecting the extraction, dissemination, use and reuse of data 53 | in a Work; 54 | vi. database rights (such as those arising under Directive 96/9/EC of the 55 | European Parliament and of the Council of 11 March 1996 on the legal 56 | protection of databases, and under any national implementation 57 | thereof, including any amended or successor version of such 58 | directive); and 59 | vii. other similar, equivalent or corresponding rights throughout the 60 | world based on applicable law or treaty, and any national 61 | implementations thereof. 62 | 63 | 2. Waiver. To the greatest extent permitted by, but not in contravention 64 | of, applicable law, Affirmer hereby overtly, fully, permanently, 65 | irrevocably and unconditionally waives, abandons, and surrenders all of 66 | Affirmer's Copyright and Related Rights and associated claims and causes 67 | of action, whether now known or unknown (including existing as well as 68 | future claims and causes of action), in the Work (i) in all territories 69 | worldwide, (ii) for the maximum duration provided by applicable law or 70 | treaty (including future time extensions), (iii) in any current or future 71 | medium and for any number of copies, and (iv) for any purpose whatsoever, 72 | including without limitation commercial, advertising or promotional 73 | purposes (the "Waiver"). Affirmer makes the Waiver for the benefit of each 74 | member of the public at large and to the detriment of Affirmer's heirs and 75 | successors, fully intending that such Waiver shall not be subject to 76 | revocation, rescission, cancellation, termination, or any other legal or 77 | equitable action to disrupt the quiet enjoyment of the Work by the public 78 | as contemplated by Affirmer's express Statement of Purpose. 79 | 80 | 3. Public License Fallback. Should any part of the Waiver for any reason 81 | be judged legally invalid or ineffective under applicable law, then the 82 | Waiver shall be preserved to the maximum extent permitted taking into 83 | account Affirmer's express Statement of Purpose. In addition, to the 84 | extent the Waiver is so judged Affirmer hereby grants to each affected 85 | person a royalty-free, non transferable, non sublicensable, non exclusive, 86 | irrevocable and unconditional license to exercise Affirmer's Copyright and 87 | Related Rights in the Work (i) in all territories worldwide, (ii) for the 88 | maximum duration provided by applicable law or treaty (including future 89 | time extensions), (iii) in any current or future medium and for any number 90 | of copies, and (iv) for any purpose whatsoever, including without 91 | limitation commercial, advertising or promotional purposes (the 92 | "License"). The License shall be deemed effective as of the date CC0 was 93 | applied by Affirmer to the Work. Should any part of the License for any 94 | reason be judged legally invalid or ineffective under applicable law, such 95 | partial invalidity or ineffectiveness shall not invalidate the remainder 96 | of the License, and in such case Affirmer hereby affirms that he or she 97 | will not (i) exercise any of his or her remaining Copyright and Related 98 | Rights in the Work or (ii) assert any associated claims and causes of 99 | action with respect to the Work, in either case contrary to Affirmer's 100 | express Statement of Purpose. 101 | 102 | 4. Limitations and Disclaimers. 103 | 104 | a. No trademark or patent rights held by Affirmer are waived, abandoned, 105 | surrendered, licensed or otherwise affected by this document. 106 | b. Affirmer offers the Work as-is and makes no representations or 107 | warranties of any kind concerning the Work, express, implied, 108 | statutory or otherwise, including without limitation warranties of 109 | title, merchantability, fitness for a particular purpose, non 110 | infringement, or the absence of latent or other defects, accuracy, or 111 | the present or absence of errors, whether or not discoverable, all to 112 | the greatest extent permissible under applicable law. 113 | c. Affirmer disclaims responsibility for clearing rights of other persons 114 | that may apply to the Work or any use thereof, including without 115 | limitation any person's Copyright and Related Rights in the Work. 116 | Further, Affirmer disclaims responsibility for obtaining any necessary 117 | consents, permissions or other rights required for any use of the 118 | Work. 119 | d. Affirmer understands and acknowledges that Creative Commons is not a 120 | party to this document and has no duty or obligation with respect to 121 | this CC0 or use of the Work. 122 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | PYTHON = python3 2 | 3 | sources = a.tsv b.tsv c.tsv d.tsv e.tsv 4 | 5 | all: dist/all.tsv $(sources:%=dist/%) 6 | 7 | dist/all.tsv: $(sources) bin/gen.py 8 | mkdir -p dist 9 | $(PYTHON) bin/gen.py $(sources) > $@ 10 | 11 | dist/%.tsv: %.tsv bin/gen.py 12 | mkdir -p dist 13 | $(PYTHON) bin/gen.py $< > $@ 14 | 15 | .PHONY: clean 16 | clean: 17 | rm -f dist/all.tsv $(sources:%=dist/%) 18 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | Chess opening names 2 | =================== 3 | 4 | An aggregated data set of chess opening names. 5 | 6 | field | `/` | `dist/` | description 7 | --- | --- | --- | --- 8 | eco | x | x | [ECO](https://en.wikipedia.org/wiki/Encyclopaedia_of_Chess_Openings) classification 9 | name | x | x | Opening name (English language) 10 | pgn | x | x| Well known sequence of moves, or the most common moves to reach the opening position based on master games, as PGN 11 | uci | | x | Same moves as `pgn` in [UCI notation](https://backscattering.de/chess/uci/#move) 12 | epd | | x | [EPD](https://www.chessprogramming.org/Extended_Position_Description) (FEN without move numbers) of the opening position, en passant field only if legal 13 | 14 | To generate `dist/`, install Python, then `pip3 install chess` and run `make`. 15 | Or select the latest 16 | [workflow run](https://github.com/lichess-org/chess-openings/actions) and 17 | download build artifacts. 18 | 19 | This dataset is also [available in the Apache Parquet format](https://hf.co/datasets/Lichess/chess-openings). 20 | 21 | Conventions 22 | ----------- 23 | 24 | * Title case is used for opening names. 25 | * Names are structured like `Opening family: Variation, Subvariation, ...`, 26 | e.g., `Sicilian Defense: Najdorf Variation, English Attack`. 27 | * The suggested way to classify games is to play moves backwards until 28 | a named position is found. To make this work well with common transpositions, 29 | multiple entries for a single opening may be added. 30 | * However, each name has a unique *shortest* line. If necessary, 31 | a distinguishing move is appended, e.g., 32 | `King's Gambit Accepted: Schurig Gambit, with Bb5`. 33 | 34 | Contributing 35 | ------------ 36 | 37 | Opening data is in `a.tsv`, `b.tsv`, `c.tsv`, `d.tsv`, and `e.tsv`. 38 | 39 | Improvements, additions and fixes are welcome. If you have concrete 40 | suggestions, please be bold and submit the proposed changes directly as pull 41 | requests! 42 | 43 | The changes will be live on lichess.org after the next update of 44 | [scalachess](https://github.com/lichess-org/scalachess) (no fixed schedule) 45 | and the 46 | [opening explorer](https://github.com/lichess-org/lila-openingexplorer) 47 | (daily). 48 | 49 | Copyright 50 | --------- 51 | 52 | As a collection of facts, this data set is in the public domain. 53 | Considerable effort was spent curating and cleaning the data. Insofar as that 54 | qualifies for copyright, the work is released under the 55 | CC0 Public Domain Dedication. 56 | 57 | [![CC0](https://i.creativecommons.org/p/zero/1.0/88x31.png)](https://creativecommons.org/publicdomain/zero/1.0/) 58 | -------------------------------------------------------------------------------- /a.tsv: -------------------------------------------------------------------------------- 1 | eco name pgn 2 | A00 Amar Opening 1. Nh3 3 | A00 Amar Opening: Paris Gambit 1. Nh3 d5 2. g3 e5 3. f4 4 | A00 Amar Opening: Paris Gambit, Gent Gambit 1. Nh3 d5 2. g3 e5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O fxg3 6. hxg3 5 | A00 Amsterdam Attack 1. e3 e5 2. c4 d6 3. Nc3 Nc6 4. b3 Nf6 6 | A00 Anderssen's Opening 1. a3 7 | A00 Anderssen's Opening: Polish Gambit 1. a3 a5 2. b4 8 | A00 Barnes Opening 1. f3 9 | A00 Barnes Opening: Fool's Mate 1. f3 e5 2. g4 Qh4# 10 | A00 Barnes Opening: Gedult Gambit 1. f3 d5 2. e4 g6 3. d4 dxe4 4. c3 11 | A00 Barnes Opening: Gedult Gambit 1. f3 f5 2. e4 fxe4 3. Nc3 12 | A00 Barnes Opening: Hammerschlag 1. f3 e5 2. Kf2 13 | A00 Clemenz Opening 1. h3 14 | A00 Clemenz Opening: Spike Lee Gambit 1. h3 h5 2. g4 15 | A00 Creepy Crawly Formation: Classical Defense 1. h3 d5 2. a3 e5 16 | A00 Formation: Hippopotamus Attack 1. a3 e5 2. b3 d5 3. c3 Nf6 4. d3 Nc6 5. e3 Bd6 6. f3 O-O 7. g3 17 | A00 Formation: Shy Attack 1. a3 e5 2. g3 d5 3. Bg2 Nf6 4. d3 Nc6 5. Nd2 Bd6 6. e3 O-O 7. h3 18 | A00 Global Opening 1. h3 e5 2. a3 19 | A00 Grob Opening 1. g4 20 | A00 Grob Opening: Alessi Gambit 1. g4 f5 21 | A00 Grob Opening: Double Grob 1. g4 g5 22 | A00 Grob Opening: Double Grob, Coca-Cola Gambit 1. g4 g5 2. f4 23 | A00 Grob Opening: Grob Gambit 1. g4 d5 2. Bg2 24 | A00 Grob Opening: Grob Gambit Declined 1. g4 d5 2. Bg2 c6 25 | A00 Grob Opening: Grob Gambit, Basman Gambit 1. g4 d5 2. Bg2 h5 3. gxh5 26 | A00 Grob Opening: Grob Gambit, Fritz Gambit 1. g4 d5 2. Bg2 Bxg4 3. c4 27 | A00 Grob Opening: Grob Gambit, Fritz Gambit, Romford Countergambit 1. g4 d5 2. Bg2 Bxg4 3. c4 d4 4. Bxb7 Nd7 5. Bxa8 Qxa8 28 | A00 Grob Opening: Grob Gambit, Keres Gambit 1. g4 d5 2. Bg2 e5 3. d4 exd4 4. c3 29 | A00 Grob Opening: Grob Gambit, Richter-Grob Gambit 1. g4 d5 2. Bg2 c6 3. c4 dxc4 4. b3 30 | A00 Grob Opening: Keene Defense 1. g4 d5 2. h3 e5 3. Bg2 c6 31 | A00 Grob Opening: Keene Defense, Main Line 1. g4 d5 2. h3 e5 3. Bg2 c6 4. d4 e4 5. c4 Bd6 6. Nc3 Ne7 32 | A00 Grob Opening: London Defense 1. g4 e5 2. h3 Nc6 33 | A00 Grob Opening: Romford Countergambit 1. g4 d5 2. Bg2 Bxg4 3. c4 d4 34 | A00 Grob Opening: Spike Attack 1. g4 d5 2. Bg2 c6 3. g5 35 | A00 Grob Opening: Spike, Hurst Attack 1. g4 e5 2. Bg2 d5 3. c4 36 | A00 Grob Opening: Zilbermints Gambit 1. g4 d5 2. e4 dxe4 3. Nc3 37 | A00 Grob Opening: Zilbermints Gambit, Schiller Defense 1. g4 d5 2. e4 dxe4 3. Nc3 h5 38 | A00 Grob Opening: Zilbermints Gambit, Zilbermints-Hartlaub Gambit 1. g4 d5 2. e4 dxe4 3. Nc3 e5 4. d3 39 | A00 Hungarian Opening 1. g3 40 | A00 Hungarian Opening: Asten Gambit 1. g3 Nc6 2. Nc3 d5 3. d4 e5 4. dxe5 d4 5. Ne4 f5 41 | A00 Hungarian Opening: Burk Gambit 1. g3 e5 2. a3 d5 3. Nf3 e4 4. Nh4 Be7 5. d3 42 | A00 Hungarian Opening: Bücker Gambit 1. g3 d5 2. Bg2 e5 3. b4 43 | A00 Hungarian Opening: Catalan Formation 1. g3 d5 2. Bg2 e6 44 | A00 Hungarian Opening: Dutch Defense 1. g3 f5 45 | A00 Hungarian Opening: Indian Defense 1. g3 Nf6 46 | A00 Hungarian Opening: Myers Defense 1. g3 g5 47 | A00 Hungarian Opening: Pachman Gambit 1. g3 f5 2. e4 fxe4 3. Qh5+ g6 48 | A00 Hungarian Opening: Paris Gambit 1. g3 e5 2. Nh3 d5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O 49 | A00 Hungarian Opening: Reversed Alekhine 1. g3 e5 2. Nf3 50 | A00 Hungarian Opening: Reversed Brooklyn Defense, Brooklyn Benko Gambit 1. g3 e5 2. Nf3 e4 3. Ng1 Nf6 4. b4 51 | A00 Hungarian Opening: Reversed Modern Defense 1. g3 d5 2. Bg2 c5 52 | A00 Hungarian Opening: Reversed Norwegian Defense 1. g3 e5 2. Nf3 e4 3. Nh4 53 | A00 Hungarian Opening: Sicilian Invitation 1. g3 c5 54 | A00 Hungarian Opening: Slav Formation 1. g3 d5 2. Bg2 c6 55 | A00 Hungarian Opening: Symmetrical Variation 1. g3 g6 56 | A00 Hungarian Opening: Van Kuijk Gambit 1. g3 h5 2. Nf3 h4 57 | A00 Hungarian Opening: Winterberg Gambit 1. g3 d5 2. Bg2 e5 3. c4 dxc4 4. b3 58 | A00 Kádas Opening 1. h4 59 | A00 Kádas Opening: Beginner's Trap 1. h4 d5 2. Rh3 60 | A00 Kádas Opening: Koola-Koola Variation 1. h4 a5 61 | A00 Kádas Opening: Kádas Gambit 1. h4 c5 2. b4 62 | A00 Kádas Opening: Kádas Gambit 1. h4 d5 2. d4 c5 3. Nf3 cxd4 4. c3 63 | A00 Kádas Opening: Kádas Gambit 1. h4 e5 2. d4 exd4 3. c3 64 | A00 Kádas Opening: Myers Variation 1. h4 d5 2. d4 c5 3. e4 65 | A00 Kádas Opening: Schneider Gambit 1. h4 g5 66 | A00 Kádas Opening: Steinbok Gambit 1. h4 f5 2. e4 fxe4 3. d3 67 | A00 Lasker Simul Special 1. g3 h5 68 | A00 Mieses Opening 1. d3 69 | A00 Mieses Opening: Myers Spike Attack 1. d3 g6 2. g4 70 | A00 Mieses Opening: Reversed Rat 1. d3 e5 71 | A00 Mieses Opening: Venezolana Variation 1. d3 c5 2. Nc3 Nc6 3. g3 72 | A00 Polish Opening 1. b4 73 | A00 Polish Opening: Baltic Defense 1. b4 d5 2. Bb2 Bf5 74 | A00 Polish Opening: Birmingham Gambit 1. b4 c5 75 | A00 Polish Opening: Bugayev Advance Variation 1. b4 e5 2. Bb2 f6 3. b5 76 | A00 Polish Opening: Bugayev Attack 1. b4 e5 2. a3 77 | A00 Polish Opening: Czech Defense 1. b4 e5 2. Bb2 d6 78 | A00 Polish Opening: Dutch Defense 1. b4 f5 79 | A00 Polish Opening: German Defense 1. b4 d5 2. Bb2 Qd6 80 | A00 Polish Opening: Grigorian Variation 1. b4 Nc6 81 | A00 Polish Opening: Karniewski Variation 1. b4 Nh6 82 | A00 Polish Opening: King's Indian Variation 1. b4 Nf6 2. Bb2 g6 83 | A00 Polish Opening: King's Indian Variation, Schiffler Attack 1. b4 Nf6 2. Bb2 g6 3. e4 84 | A00 Polish Opening: King's Indian Variation, Sokolsky Attack 1. b4 Nf6 2. Bb2 g6 3. c4 Bg7 4. e3 d6 5. Nf3 O-O 6. d4 85 | A00 Polish Opening: Myers Variation 1. b4 d5 2. Bb2 c6 3. a4 86 | A00 Polish Opening: Outflank Variation 1. b4 c6 87 | A00 Polish Opening: Queen's Indian Variation 1. b4 e6 2. Bb2 Nf6 3. b5 b6 88 | A00 Polish Opening: Queenside Defense 1. b4 e6 2. Bb2 Nf6 3. b5 a6 89 | A00 Polish Opening: Rooks Swap Line 1. b4 e6 2. Bb2 Nf6 3. b5 a6 4. a4 axb5 5. axb5 Rxa1 6. Bxa1 90 | A00 Polish Opening: Schiffler-Sokolsky Variation 1. b4 e6 2. Bb2 Nf6 3. b5 d5 4. e3 91 | A00 Polish Opening: Schuehler Gambit 1. b4 c6 2. Bb2 a5 3. b5 cxb5 4. e4 92 | A00 Polish Opening: Symmetrical Variation 1. b4 b5 93 | A00 Polish Opening: Tartakower Gambit 1. b4 e5 2. Bb2 f6 3. e4 94 | A00 Polish Opening: Wolferts Gambit 1. b4 e5 2. Bb2 c5 95 | A00 Saragossa Opening 1. c3 96 | A00 Sodium Attack 1. Na3 97 | A00 Sodium Attack: Celadon Variation 1. Na3 e5 2. d3 Bxa3 3. bxa3 d5 4. e3 c5 5. Rb1 98 | A00 Sodium Attack: Chenoboskion Variation 1. Na3 g6 2. g4 99 | A00 Sodium Attack: Durkin Gambit 1. Na3 e5 2. Nc4 Nc6 3. e4 f5 100 | A00 Valencia Opening 1. d3 e5 2. Nd2 101 | A00 Van Geet Opening 1. Nc3 102 | A00 Van Geet Opening: Battambang Variation 1. a3 e5 2. Nc3 103 | A00 Van Geet Opening: Billockus-Johansen Gambit 1. Nc3 e5 2. Nf3 Bc5 104 | A00 Van Geet Opening: Damhaug Gambit 1. Nc3 d5 2. f4 e5 105 | A00 Van Geet Opening: Dougherty Gambit 1. Nc3 d5 2. e4 dxe4 3. f3 106 | A00 Van Geet Opening: Dunst-Perrenet Gambit 1. Nc3 d5 2. e4 dxe4 3. d3 107 | A00 Van Geet Opening: Düsseldorf Gambit 1. Nc3 c5 2. b4 108 | A00 Van Geet Opening: Gladbacher Gambit 1. Nc3 e5 2. b3 d5 3. e4 dxe4 4. d3 109 | A00 Van Geet Opening: Hector Gambit 1. Nc3 d5 2. e4 dxe4 3. Bc4 110 | A00 Van Geet Opening: Hergert Gambit 1. Nc3 d6 2. f4 e5 3. fxe5 Nc6 111 | A00 Van Geet Opening: Hulsemann Gambit 1. Nc3 e5 2. e3 d5 3. Qh5 Be6 112 | A00 Van Geet Opening: Jendrossek Gambit 1. Nc3 d5 2. f4 d4 3. Ne4 f5 4. Nf2 Nf6 5. Nf3 c5 6. b4 113 | A00 Van Geet Opening: Kluever Gambit 1. Nc3 f5 2. e4 fxe4 3. d3 114 | A00 Van Geet Opening: Laroche Gambit 1. Nc3 b5 115 | A00 Van Geet Opening: Liebig Gambit 1. Nc3 e5 2. e3 d5 3. Qh5 Nf6 116 | A00 Van Geet Opening: Melleby Gambit 1. Nc3 d5 2. f4 d4 3. Ne4 c5 117 | A00 Van Geet Opening: Myers Attack 1. Nc3 g6 2. h4 118 | A00 Van Geet Opening: Napoleon Attack 1. Nc3 e5 2. Nf3 Nc6 3. d4 119 | A00 Van Geet Opening: Novosibirsk Variation 1. Nc3 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qh4 120 | A00 Van Geet Opening: Nowokunski Gambit 1. Nc3 e5 2. f4 exf4 3. e4 121 | A00 Van Geet Opening: Pfeiffer Gambit 1. Nc3 d5 2. f4 d4 3. Ne4 e5 122 | A00 Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit 1. Nc3 d5 2. f4 d4 3. Ne4 e5 4. Nf3 123 | A00 Van Geet Opening: Reversed Nimzowitsch 1. Nc3 e5 124 | A00 Van Geet Opening: Reversed Scandinavian 1. Nc3 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qa4 125 | A00 Van Geet Opening: Sicilian Two Knights 1. Nc3 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 126 | A00 Van Geet Opening: Sleipnir Gambit 1. Nc3 d5 2. e3 e5 3. d4 Bb4 127 | A00 Van Geet Opening: Twyble Attack 1. Nc3 c5 2. Rb1 128 | A00 Van Geet Opening: Tübingen Gambit 1. Nc3 Nf6 2. g4 129 | A00 Van Geet Opening: Venezolana Variation 1. Nc3 d5 2. d3 Nf6 3. g3 130 | A00 Van Geet Opening: Warsteiner Gambit 1. Nc3 d5 2. f4 g5 131 | A00 Van't Kruijs Opening 1. e3 132 | A00 Van't Kruijs Opening: Bouncing Bishop Variation 1. e3 e5 2. Bc4 b5 3. Bb3 133 | A00 Van't Kruijs Opening: Keoni-Hiva Gambit, Akahi Variation 1. e3 e5 2. Nc3 Nf6 3. f4 exf4 4. Nf3 134 | A00 Van't Kruijs Opening: Keoni-Hiva Gambit, Alua Variation 1. e3 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 135 | A00 Van't Kruijs Opening: Keoni-Hiva Gambit, Ekolu Variation 1. e3 e5 2. Nc3 d5 3. f4 exf4 4. Nf3 136 | A00 Ware Opening 1. a4 137 | A00 Ware Opening: Cologne Gambit 1. a4 b6 2. d4 d5 3. Nc3 Nd7 138 | A00 Ware Opening: Crab Variation 1. a4 e5 2. h4 139 | A00 Ware Opening: Meadow Hay Trap 1. a4 e5 2. Ra3 140 | A00 Ware Opening: Symmetric Variation 1. a4 a5 141 | A00 Ware Opening: Ware Gambit 1. a4 e5 2. a5 d5 3. e3 f5 4. a6 142 | A00 Ware Opening: Wing Gambit 1. a4 b5 2. axb5 Bb7 143 | A01 Nimzo-Larsen Attack 1. b3 144 | A01 Nimzo-Larsen Attack: Classical Variation 1. b3 d5 145 | A01 Nimzo-Larsen Attack: Dutch Variation 1. b3 f5 146 | A01 Nimzo-Larsen Attack: English Variation 1. b3 c5 147 | A01 Nimzo-Larsen Attack: Graz Attack 1. b3 d5 2. Ba3 148 | A01 Nimzo-Larsen Attack: Indian Variation 1. b3 Nf6 149 | A01 Nimzo-Larsen Attack: Modern Variation 1. b3 e5 150 | A01 Nimzo-Larsen Attack: Modern Variation 1. b3 e5 2. Bb2 Nc6 151 | A01 Nimzo-Larsen Attack: Modern Variation 1. b3 e5 2. Bb2 Nc6 3. e3 152 | A01 Nimzo-Larsen Attack: Modern Variation 1. b3 e5 2. Bb2 Nc6 3. c4 Nf6 153 | A01 Nimzo-Larsen Attack: Pachman Gambit 1. b3 e5 2. Bb2 Nc6 3. f4 154 | A01 Nimzo-Larsen Attack: Polish Variation 1. b3 b5 155 | A01 Nimzo-Larsen Attack: Ringelbach Gambit 1. b3 f5 2. Bb2 e6 3. e4 156 | A01 Nimzo-Larsen Attack: Spike Variation 1. b3 Nf6 2. Bb2 g6 3. g4 157 | A01 Nimzo-Larsen Attack: Symmetrical Variation 1. b3 b6 158 | A02 Bird Opening 1. f4 159 | A02 Bird Opening: Batavo-Polish Attack 1. f4 Nf6 2. Nf3 g6 3. b4 160 | A02 Bird Opening: Double Duck Formation 1. f4 f5 2. d4 d5 161 | A02 Bird Opening: From's Gambit 1. f4 e5 162 | A02 Bird Opening: From's Gambit, Bahr Gambit 1. f4 e5 2. Nc3 163 | A02 Bird Opening: From's Gambit, Langheld Gambit 1. f4 e5 2. fxe5 d6 3. exd6 Nf6 164 | A02 Bird Opening: From's Gambit, Lasker Variation 1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 g5 165 | A02 Bird Opening: From's Gambit, Lipke Variation 1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 Nh6 5. d4 166 | A02 Bird Opening: Hobbs Gambit 1. f4 g5 167 | A02 Bird Opening: Hobbs-Zilbermints Gambit 1. f4 h6 2. Nf3 g5 168 | A02 Bird Opening: Horsefly Defense 1. f4 Nh6 169 | A02 Bird Opening: Lasker Gambit 1. f4 e5 2. fxe5 f6 170 | A02 Bird Opening: Mujannah 1. f4 Nf6 2. c4 171 | A02 Bird Opening: Myers Defense 1. f4 b5 172 | A02 Bird Opening: Platz Gambit 1. f4 e5 2. fxe5 Ne7 173 | A02 Bird Opening: Schlechter Gambit 1. f4 e5 2. fxe5 Nc6 174 | A02 Bird Opening: Siegener Gambit 1. f4 e5 2. d4 exd4 3. Nf3 c5 4. c3 175 | A02 Bird Opening: Swiss Gambit 1. f4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4 176 | A02 Bird Opening: Wagner-Zwitersch Gambit 1. f4 f5 2. e4 177 | A03 Bird Opening: Dutch Variation 1. f4 d5 178 | A03 Bird Opening: Dutch Variation, Dudweiler Gambit 1. f4 d5 2. g4 179 | A03 Bird Opening: Lasker Variation 1. f4 d5 2. Nf3 Nf6 3. e3 c5 180 | A03 Bird Opening: Sturm Gambit 1. f4 d5 2. c4 181 | A03 Bird Opening: Thomas Gambit 1. f4 d5 2. b3 Nf6 3. Bb2 d4 4. Nf3 c5 5. e3 182 | A03 Bird Opening: Williams Gambit 1. f4 d5 2. e4 183 | A03 Bird Opening: Williams Gambit 1. f4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Qe2 184 | A03 Bird Opening: Williams-Zilbermints Gambit 1. f4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Nge2 185 | A04 Colle System: Rhamphorhynchus Variation 1. Nf3 c5 2. e3 g6 3. d4 Bg7 4. dxc5 Qa5+ 186 | A04 Modern Defense: Semi-Averbakh Variation, Polish Variation 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qb6 187 | A04 Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+ 188 | A04 Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Accepted 1. Nf3 g6 2. d4 Bg7 3. e4 d6 4. c4 c5 5. dxc5 Qa5+ 189 | A04 Zukertort Defense: Kingside Variation 1. Nf3 Nh6 2. d4 g6 190 | A04 Zukertort Defense: Sicilian Knight Variation 1. Nf3 Na6 2. e4 c5 191 | A04 Zukertort Opening 1. Nf3 192 | A04 Zukertort Opening: Arctic Defense 1. Nf3 f6 193 | A04 Zukertort Opening: Arctic Defense, Drunken Knight Variation 1. Nf3 f6 2. e4 Nh6 3. d4 Nf7 194 | A04 Zukertort Opening: Basman Defense 1. Nf3 h6 195 | A04 Zukertort Opening: Black Mustang Defense 1. Nf3 Nc6 196 | A04 Zukertort Opening: Drunken Cavalry Variation 1. Nf3 Na6 2. e4 Nh6 197 | A04 Zukertort Opening: Dutch Variation 1. Nf3 f5 198 | A04 Zukertort Opening: Herrstrom Gambit 1. Nf3 g5 199 | A04 Zukertort Opening: Kingside Fianchetto 1. Nf3 g6 200 | A04 Zukertort Opening: Lisitsyn Gambit 1. Nf3 f5 2. e4 201 | A04 Zukertort Opening: Lisitsyn Gambit Deferred 1. Nf3 f5 2. d3 Nf6 3. e4 202 | A04 Zukertort Opening: Pirc Invitation 1. Nf3 d6 203 | A04 Zukertort Opening: Polish Defense 1. Nf3 b5 204 | A04 Zukertort Opening: Queen's Gambit Invitation 1. Nf3 e6 205 | A04 Zukertort Opening: Queenside Fianchetto Variation 1. Nf3 b6 206 | A04 Zukertort Opening: Ross Gambit 1. Nf3 e5 207 | A04 Zukertort Opening: Shabalov Gambit 1. Nf3 e6 2. c4 a6 3. Nc3 c5 4. g3 b5 208 | A04 Zukertort Opening: Sicilian Invitation 1. Nf3 c5 209 | A04 Zukertort Opening: Slav Invitation 1. Nf3 c6 210 | A04 Zukertort Opening: Speelsmet Gambit 1. Nf3 c5 2. d4 cxd4 3. e3 211 | A04 Zukertort Opening: St. George Defense 1. Nf3 a6 212 | A04 Zukertort Opening: The Walrus 1. Nf3 e5 2. Nxe5 Nc6 3. Nxc6 dxc6 213 | A04 Zukertort Opening: Vos Gambit 1. Nf3 d6 2. d4 e5 214 | A04 Zukertort Opening: Wade Defense 1. Nf3 d6 2. e4 Bg4 215 | A04 Zukertort Opening: Ware Defense 1. Nf3 a5 216 | A05 King's Indian Attack 1. Nf3 Nf6 2. g3 d5 217 | A05 King's Indian Attack: Smyslov Variation 1. Nf3 Nf6 2. g3 g6 3. b4 218 | A05 King's Indian Attack: Spassky Variation 1. Nf3 Nf6 2. g3 b5 219 | A05 King's Indian Attack: Symmetrical Defense 1. Nf3 Nf6 2. g3 g6 220 | A05 King's Indian Attack: Wahls Defense 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 d5 221 | A05 Polish Opening: Zukertort System 1. Nf3 Nf6 2. b4 222 | A05 Zukertort Opening 1. Nf3 Nf6 223 | A05 Zukertort Opening 1. Nf3 Nf6 2. Nc3 Nc6 224 | A05 Zukertort Opening: Double Fianchetto Attack 1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d6 6. O-O 225 | A05 Zukertort Opening: Lemberger Gambit 1. Nf3 Nf6 2. e4 226 | A05 Zukertort Opening: Myers Polish Attack 1. Nf3 Nf6 2. a4 g6 3. b4 227 | A05 Zukertort Opening: Nimzo-Larsen Variation 1. Nf3 Nf6 2. b3 228 | A05 Zukertort Opening: Quiet System 1. Nf3 Nf6 2. e3 229 | A06 Nimzo-Larsen Attack: Classical Variation 1. Nf3 d5 2. b3 230 | A06 Nimzo-Larsen Attack: Norfolk Gambit 1. Nf3 d5 2. b3 c5 3. e4 231 | A06 Nimzo-Larsen Attack: Norfolk Gambit 1. Nf3 d5 2. b3 Nf6 3. Bb2 c5 4. e4 232 | A06 Zukertort Opening 1. Nf3 d5 233 | A06 Zukertort Opening: Ampel Variation 1. Nf3 d5 2. Rg1 234 | A06 Zukertort Opening: Old Indian Attack 1. Nf3 d5 2. d3 235 | A06 Zukertort Opening: Pachman Gambit 1. Nf3 d5 2. e3 c5 3. c4 dxc4 4. b3 236 | A06 Zukertort Opening: Regina-Nu Gambit 1. Nf3 d5 2. b3 c5 3. c4 dxc4 4. Nc3 237 | A06 Zukertort Opening: Reversed Mexican Defense 1. Nf3 d5 2. Nc3 238 | A06 Zukertort Opening: Santasiere's Folly 1. b4 d5 2. Nf3 239 | A06 Zukertort Opening: Tennison Gambit 1. e4 d5 2. Nf3 240 | A06 Zukertort Opening: Tennison Gambit, Brigg's Trap 1. e4 d5 2. Nf3 dxe4 3. Ng5 Nf6 4. Nc3 Bf5 5. Qe2 Qd4 241 | A06 Zukertort Opening: The Potato 1. Nf3 d5 2. a4 242 | A07 Hungarian Opening: Wiedenhagen-Beta Gambit 1. g3 d5 2. Nf3 g5 243 | A07 King's Indian Attack 1. Nf3 d5 2. g3 244 | A07 King's Indian Attack: Double Fianchetto 1. Nf3 d5 2. g3 g6 245 | A07 King's Indian Attack: Keres Variation 1. Nf3 d5 2. g3 Bg4 246 | A07 King's Indian Attack: Keres Variation 1. Nf3 d5 2. g3 Bg4 3. Bg2 Nd7 247 | A07 King's Indian Attack: Omega-Delta Gambit 1. Nf3 d5 2. g3 e5 248 | A07 King's Indian Attack: Pachman System 1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5 5. d3 Ne7 249 | A07 King's Indian Attack: Sicilian Variation 1. Nf3 d5 2. g3 c5 250 | A07 King's Indian Attack: Yugoslav Variation 1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bg4 251 | A08 King's Indian Attack: French Variation 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 252 | A08 King's Indian Attack: Sicilian Variation 1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 c5 5. g3 Nc6 6. Bg2 Be7 7. O-O O-O 8. Re1 253 | A08 King's Indian Attack: Sicilian Variation 1. Nf3 d5 2. g3 c5 3. Bg2 254 | A08 King's Indian Attack: Sicilian Variation 1. Nf3 d5 2. g3 c5 3. Bg2 Nf6 4. O-O e6 5. d3 255 | A08 Zukertort Opening: Reversed Grünfeld 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 256 | A08 Zukertort Opening: Reversed Grünfeld 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6 257 | A08 Zukertort Opening: Reversed Grünfeld 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6 5. O-O 258 | A08 Zukertort Opening: Reversed Grünfeld 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 e6 5. O-O 259 | A09 Réti Opening 1. Nf3 d5 2. c4 260 | A09 Réti Opening: Advance Variation 1. Nf3 d5 2. c4 d4 261 | A09 Réti Opening: Advance Variation, Michel Gambit 1. Nf3 d5 2. c4 d4 3. b4 c5 262 | A09 Réti Opening: Penguin Variation 1. Nf3 d5 2. c4 d4 3. Rg1 263 | A09 Réti Opening: Reversed Blumenfeld Gambit 1. Nf3 d5 2. c4 d4 3. e3 c5 4. b4 264 | A09 Réti Opening: Réti Accepted 1. Nf3 d5 2. c4 dxc4 265 | A09 Réti Opening: Réti Gambit, Keres Variation 1. Nf3 d5 2. c4 dxc4 3. e3 Be6 266 | A09 Réti Opening: Zilbermints Gambit 1. Nf3 d5 2. c4 b5 267 | A10 English Opening 1. c4 268 | A10 English Opening: Achilles-Omega Gambit 1. c4 Nf6 2. e4 269 | A10 English Opening: Adorjan Defense 1. c4 g6 2. e4 e5 270 | A10 English Opening: Anglo-Dutch Defense 1. c4 f5 271 | A10 English Opening: Anglo-Dutch Defense, Hickmann Gambit 1. c4 f5 2. e4 272 | A10 English Opening: Anglo-Dutch Variation, Chabanon Gambit 1. c4 f5 2. Nf3 d6 3. e4 273 | A10 English Opening: Anglo-Dutch Variation, Ferenc Gambit 1. c4 f5 2. Nc3 Nf6 3. e4 274 | A10 English Opening: Anglo-Lithuanian Variation 1. c4 Nc6 275 | A10 English Opening: Anglo-Scandinavian Defense 1. c4 d5 276 | A10 English Opening: Anglo-Scandinavian Defense, Löhn Gambit 1. c4 d5 2. cxd5 e6 277 | A10 English Opening: Anglo-Scandinavian Defense, Malvinas Variation 1. c4 d5 2. cxd5 Qxd5 3. Nc3 Qa5 278 | A10 English Opening: Anglo-Scandinavian Defense, Schulz Gambit 1. c4 d5 2. cxd5 Nf6 279 | A10 English Opening: Great Snake Variation 1. c4 g6 280 | A10 English Opening: Jaenisch Gambit 1. c4 b5 281 | A10 English Opening: King's English Variation, Botvinnik System, Prickly Pawn Pass System 1. c4 g6 2. Nc3 Bg7 3. g3 Nf6 4. Bg2 O-O 5. e4 d6 6. Nge2 e5 7. O-O c6 8. d3 a6 282 | A10 English Opening: Myers Defense 1. c4 g5 283 | A10 English Opening: Myers Gambit 1. c4 g5 2. d4 Bg7 284 | A10 English Opening: Porcupine Variation 1. c4 f5 2. Nc3 Nf6 3. e4 fxe4 4. g4 285 | A10 English Opening: Wade Gambit 1. c4 f5 2. g4 286 | A10 English Opening: Zilbermints Gambit 1. c4 g5 2. d4 e5 287 | A11 English Opening: Caro-Kann Defensive System 1. c4 c6 288 | A12 Réti Opening: Anglo-Slav Variation, Bled Variation 1. Nf3 d5 2. b3 Nf6 3. Bb2 g6 4. c4 c6 289 | A12 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation 1. Nf3 d5 2. c4 c6 3. b3 290 | A12 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation 1. Nf3 d5 2. c4 c6 3. b3 Bg4 291 | A12 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation 1. Nf3 Nf6 2. c4 c6 3. b3 d5 4. Bb2 292 | A12 Réti Opening: Anglo-Slav Variation, Capablanca Variation 1. c4 Nf6 2. Nf3 c6 3. b3 d5 4. Bb2 Bg4 293 | A12 Réti Opening: Anglo-Slav Variation, London Defensive System 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 294 | A12 Réti Opening: Anglo-Slav Variation, New York System 1. Nf3 Nf6 2. c4 c6 3. b3 d5 4. Bb2 Bf5 295 | A12 Réti Opening: Anglo-Slav Variation, Torre System 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bg4 296 | A13 English Opening: Agincourt Defense 1. c4 e6 297 | A13 English Opening: Agincourt Defense 1. c4 e6 2. Nf3 298 | A13 English Opening: Agincourt Defense 1. c4 e6 2. Nf3 d5 299 | A13 English Opening: Agincourt Defense, Bogoljubow Defense 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bd6 300 | A13 English Opening: Agincourt Defense, Catalan Defense 1. c4 e6 2. Nf3 d5 3. g3 b6 4. Bg2 Bb7 5. O-O 301 | A13 English Opening: Agincourt Defense, Catalan Defense 1. c4 e6 2. Nf3 d5 3. g3 c5 302 | A13 English Opening: Agincourt Defense, Catalan Defense Accepted 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4 303 | A13 English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 c6 304 | A13 English Opening: Agincourt Defense, Kurajica Defense 1. c4 e6 2. Nf3 d5 3. g3 c6 305 | A13 English Opening: Agincourt Defense, Tarrasch Defense 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 c5 5. b3 Nc6 6. O-O Be7 306 | A13 English Opening: Agincourt Defense, Wimpy System 1. c4 e6 2. Nf3 Nf6 3. b3 d5 4. Bb2 c5 5. e3 307 | A13 English Opening: Neo-Catalan 1. c4 e6 2. Nf3 d5 3. g3 Nf6 308 | A13 English Opening: Neo-Catalan Declined 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 309 | A13 English Opening: Romanishin Gambit 1. c4 Nf6 2. Nf3 e6 3. g3 a6 4. Bg2 b5 310 | A14 English Opening: Agincourt Defense, Keres Defense 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O c5 6. cxd5 Nxd5 7. Nc3 Nc6 311 | A14 English Opening: Agincourt Defense, Neo-Catalan Declined 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O 312 | A14 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line 1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. b3 c6 7. Bb2 313 | A15 English Opening: Anglo-Indian Defense 1. c4 Nf6 314 | A15 English Opening: Anglo-Indian Defense, Anti-Anti-Grünfeld 1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. e4 315 | A15 English Opening: Anglo-Indian Defense, Grünfeld Formation 1. c4 Nf6 2. Nf3 g6 3. g3 d5 316 | A15 English Opening: Anglo-Indian Defense, King's Indian Formation 1. c4 Nf6 2. Nf3 g6 317 | A15 English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto 1. c4 Nf6 2. Nf3 g6 3. g3 b6 4. Bg2 Bb7 318 | A15 English Opening: Anglo-Indian Defense, King's Knight Variation 1. c4 Nf6 2. Nf3 319 | A15 English Opening: Anglo-Indian Defense, Old Indian Formation 1. c4 Nf6 2. Nf3 d6 320 | A15 English Opening: Anglo-Indian Defense, Queen's Indian Formation 1. c4 Nf6 2. Nf3 b6 321 | A15 English Opening: Anglo-Indian Defense, Queen's Indian Formation 1. c4 e6 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 322 | A15 English Opening: Anglo-Indian Defense, Romanishin Variation 1. c4 e6 2. Nf3 Nf6 3. g3 a6 323 | A15 English Opening: Anglo-Indian Defense, Scandinavian Defense 1. c4 Nf6 2. Nf3 d5 324 | A15 English Opening: Anglo-Indian Defense, Scandinavian Defense, Exchange Variation 1. c4 Nf6 2. Nf3 d5 3. cxd5 Nxd5 325 | A15 English Opening: Anglo-Indian Defense, Slav Formation 1. c4 Nf6 2. Nf3 g6 3. g3 c6 326 | A15 English Orangutan 1. c4 Nf6 2. b4 327 | A16 English Opening: Anglo-Grünfeld Defense 1. c4 Nf6 2. Nc3 d5 328 | A16 English Opening: Anglo-Grünfeld Defense, Korchnoi Variation 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6 5. g3 Bg7 6. Bg2 e5 329 | A16 English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 330 | A16 English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6 331 | A16 English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6 332 | A16 English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nxc3 333 | A16 English Opening: Anglo-Indian Defense, Queen's Knight Variation 1. c4 Nf6 2. Nc3 334 | A17 English Opening: Anglo-Indian Defense 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 c5 5. e3 e6 335 | A17 English Opening: Anglo-Indian Defense, Hedgehog System 1. c4 Nf6 2. Nc3 e6 336 | A17 English Opening: Anglo-Indian Defense, Nimzo-English 1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4 337 | A17 English Opening: Anglo-Indian Defense, Queen's Indian Formation 1. c4 e6 2. Nc3 Nf6 3. Nf3 b6 338 | A17 English Opening: Anglo-Indian Defense, Queen's Indian Variation 1. c4 e6 2. Nc3 Nf6 3. Nf3 b6 4. e4 Bb7 5. Bd3 339 | A17 English Opening: Anglo-Indian Defense, Zvjaginsev-Krasenkow Attack 1. c4 e6 2. Nc3 Nf6 3. Nf3 Bb4 4. g4 340 | A18 English Opening: Mikenas-Carls Variation 1. c4 e6 2. Nc3 Nf6 3. e4 341 | A18 English Opening: Mikenas-Carls Variation 1. c4 e6 2. Nc3 Nf6 3. e4 Nc6 342 | A18 English Opening: Mikenas-Carls Variation 1. c4 e6 2. Nc3 Nf6 3. e4 d5 4. e5 343 | A19 English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit 1. c4 e6 2. Nc3 Nf6 3. e4 c5 4. e5 Ng8 344 | A19 English Opening: Mikenas-Carls, Sicilian 1. c4 e6 2. Nc3 Nf6 3. e4 c5 345 | A20 English Opening: Drill Variation 1. c4 e5 2. g3 h5 346 | A20 English Opening: King's English Variation 1. c4 e5 347 | A20 English Opening: King's English Variation, Kahiko-Hula Gambit 1. c4 e5 2. e3 Nf6 3. f4 exf4 4. Nf3 348 | A20 English Opening: King's English Variation, Nimzowitsch Variation 1. c4 e5 2. Nf3 349 | A20 English Opening: King's English Variation, Nimzowitsch-Flohr Variation 1. c4 e5 2. Nf3 e4 350 | A21 English Opening: King's English Variation 1. c4 e5 2. Nc3 d6 3. Nf3 351 | A21 English Opening: King's English Variation, Keres Defense 1. c4 e5 2. Nc3 d6 3. g3 c6 352 | A21 English Opening: King's English Variation, Kramnik-Shirov Counterattack 1. c4 e5 2. Nc3 Bb4 353 | A21 English Opening: King's English Variation, Reversed Sicilian 1. c4 e5 2. Nc3 354 | A21 English Opening: King's English Variation, Smyslov Defense 1. c4 e5 2. Nc3 d6 3. Nf3 Bg4 355 | A21 English Opening: King's English Variation, Troger Defense 1. c4 e5 2. Nc3 Nc6 3. g3 d6 4. Bg2 Be6 356 | A22 English Opening: Carls-Bremen System 1. c4 e5 2. Nc3 Nf6 3. g3 357 | A22 English Opening: King's English Variation, Adhiban Gambit 1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 c6 358 | A22 English Opening: King's English Variation, Bellon Gambit 1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 b5 359 | A22 English Opening: King's English Variation, Two Knights Variation 1. c4 e5 2. Nc3 Nf6 360 | A22 English Opening: King's English Variation, Two Knights Variation, Reversed Dragon 1. c4 e5 2. Nc3 Nf6 3. g3 d5 361 | A22 English Opening: King's English Variation, Two Knights Variation, Smyslov System 1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 362 | A22 English Opening: King's English, Erbenheimer Gambit 1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 Ng4 363 | A22 English Opening: King's English, Mazedonisch 1. c4 e5 2. Nc3 Nf6 3. f4 364 | A23 English Opening: King's English Variation, Two Knights Variation, Keres Variation 1. c4 e5 2. Nc3 Nf6 3. g3 c6 365 | A23 English Opening: King's English Variation, Two Knights Variation, Keres Variation 1. c4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 c6 366 | A24 English Opening: King's English Variation, Two Knights Variation, Fianchetto Line 1. c4 e5 2. Nc3 Nf6 3. g3 g6 367 | A25 English Opening: Closed, Taimanov Variation 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Rb1 Nh6 5. Bg2 Bg7 368 | A25 English Opening: Closed, Taimanov Variation 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Nh6 369 | A25 English Opening: King's English Variation, Bremen-Hort Variation 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Be6 370 | A25 English Opening: King's English Variation, Closed System 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 371 | A25 English Opening: King's English Variation, Hungarian Attack 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1 372 | A25 English Opening: King's English Variation, Reversed Closed Sicilian 1. c4 e5 2. Nc3 Nc6 373 | A25 English Opening: King's English Variation, Taimanov Variation 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 374 | A26 English Opening: King's English Variation, Botvinnik System 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4 375 | A26 English Opening: King's English Variation, Closed System, Full Symmetry 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 376 | A27 English Opening: King's English Variation, Three Knights System 1. c4 e5 2. Nc3 Nc6 3. Nf3 377 | A28 English Opening: Four Knights System, Nimzowitsch Variation 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e4 378 | A28 English Opening: King's English Variation, Four Knights Variation 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 379 | A28 English Opening: King's English Variation, Four Knights Variation 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Bb4 6. Bg5 h6 7. Bh4 Bxc3+ 8. bxc3 Ne5 380 | A28 English Opening: King's English Variation, Four Knights Variation, Bradley Beach Variation 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 e4 381 | A28 English Opening: King's English Variation, Four Knights Variation, Flexible Line 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d3 382 | A28 English Opening: King's English Variation, Four Knights Variation, Korchnoi Line 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3 383 | A28 English Opening: King's English Variation, Four Knights Variation, Quiet Line 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 384 | A28 English Opening: King's English Variation, Four Knights Variation, Quiet Line 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 Bxc3 385 | A28 English Opening: King's English Variation, Four Knights Variation, Quiet Line 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 O-O 6. Nd5 Re8 7. Qf5 386 | A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 387 | A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 388 | A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. d3 389 | A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. d3 Be7 7. O-O O-O 390 | A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, Delayed .. Nc6 1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. Nf3 Re8 6. O-O e4 7. Nd4 Nc6 391 | A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Bc5 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Bc5 392 | A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 393 | A30 English Opening: Symmetrical Variation 1. c4 c5 394 | A30 English Opening: Symmetrical Variation 1. c4 c5 2. Nf3 395 | A30 English Opening: Symmetrical Variation, Hedgehog Defense 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 396 | A30 English Opening: Symmetrical Variation, Napolitano Gambit 1. c4 c5 2. Nf3 Nf6 3. b4 397 | A30 English Opening: Symmetrical, Hedgehog, Flexible Formation 1. c4 e6 2. Nf3 c5 3. Nc3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Rd1 a6 10. b3 Nbd7 398 | A30 English Opening: Wing Gambit 1. c4 c5 2. b4 399 | A31 English Opening: Symmetrical Variation, Anti-Benoni Variation 1. c4 Nf6 2. d4 c5 3. Nf3 400 | A32 English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense 1. c4 e6 2. d4 c5 3. Nf3 cxd4 4. Nxd4 Nf6 401 | A33 English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 Nc6 5. g3 cxd4 6. Nxd4 Qb6 402 | A33 English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 cxd4 5. Nxd4 Nc6 403 | A34 English Opening: Symmetrical Variation 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 cxd4 404 | A34 English Opening: Symmetrical Variation, Fianchetto Variation 1. c4 Nf6 2. Nc3 c5 3. g3 405 | A34 English Opening: Symmetrical Variation, Normal Variation 1. c4 c5 2. Nc3 406 | A34 English Opening: Symmetrical Variation, Rubinstein Variation 1. c4 Nf6 2. Nc3 c5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7 407 | A34 English Opening: Symmetrical Variation, Rubinstein Variation 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nc7 408 | A34 English Opening: Symmetrical Variation, Three Knights Variation 1. c4 c5 2. Nc3 Nf6 3. Nf3 409 | A35 English Opening: Symmetrical Variation 1. c4 c5 2. Nc3 Nf6 3. Nf3 e5 410 | A35 English Opening: Symmetrical Variation, Four Knights Variation 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 411 | A35 English Opening: Symmetrical Variation, Two Knights Variation 1. c4 c5 2. Nc3 Nc6 412 | A36 English Opening: Symmetrical Variation, Botvinnik System 1. c4 c5 2. e4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 413 | A36 English Opening: Symmetrical Variation, Botvinnik System Reversed, with e3 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 e5 414 | A36 English Opening: Symmetrical Variation, Two Knights, Fianchetto Variation 1. c4 c5 2. Nc3 Nc6 3. g3 415 | A36 English Opening: Symmetrical Variation, Ultra-Symmetrical Variation 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 416 | A37 English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 417 | A37 English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 418 | A38 English Opening: Symmetrical Variation, Double Fianchetto 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. b3 419 | A38 English Opening: Symmetrical Variation, Duchamp Variation 1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c5 6. Nc3 Nc6 7. d3 420 | A38 English Opening: Symmetrical Variation, Full Symmetry Line 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 421 | A39 English Opening: Symmetrical Variation, Mecking Variation 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 422 | A40 Australian Defense 1. d4 Na6 423 | A40 Benoni Defense: Franco-Sicilian Hybrid 1. d4 e6 2. c4 c5 3. d5 exd5 4. cxd5 d6 5. Nc3 g6 6. e4 Bg7 7. Nf3 Ne7 424 | A40 Borg Defense: Borg Gambit 1. d4 g5 425 | A40 Colle System: Pterodactyl Variation 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+ 426 | A40 Colle System: Siroccopteryx Variation 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+ 427 | A40 English Defense 1. d4 b6 428 | A40 English Defense 1. d4 e6 2. c4 b6 429 | A40 English Defense: Eastbourne Gambit 1. d4 b6 2. c4 Bb7 3. Nc3 e5 430 | A40 English Defense: Hartlaub Gambit Accepted 1. c4 e6 2. d4 b6 3. Nc3 Bb7 4. e4 f5 5. exf5 Nf6 431 | A40 English Defense: Hartlaub Gambit Declined 1. c4 e6 2. d4 b6 3. Nc3 Bb7 4. e4 f5 5. d5 432 | A40 English Defense: Perrin Variation 1. d4 e6 2. c4 b6 3. e4 Bb7 4. Bd3 Nc6 433 | A40 English Defense: Poli Gambit 1. d4 e6 2. c4 b6 3. e4 Bb7 4. f3 f5 5. exf5 Nh6 434 | A40 Englund Gambit 1. d4 e5 435 | A40 Englund Gambit Declined 1. d4 e5 2. d5 436 | A40 Englund Gambit Declined: Diemer Counterattack 1. d4 e5 2. d5 Bc5 3. e4 Qh4 437 | A40 Englund Gambit Declined: Reversed Alekhine 1. d4 e5 2. Nf3 438 | A40 Englund Gambit Declined: Reversed Brooklyn 1. d4 e5 2. Nf3 e4 3. Ng1 439 | A40 Englund Gambit Declined: Reversed French 1. d4 e5 2. e3 440 | A40 Englund Gambit Declined: Reversed Krebs 1. d4 e5 2. Nf3 e4 441 | A40 Englund Gambit Declined: Reversed Mokele Mbembe 1. d4 e5 2. Nf3 e4 3. Ne5 442 | A40 Englund Gambit: Felbecker Gambit 1. d4 e5 2. dxe5 Nc6 3. Nf3 Bc5 443 | A40 Englund Gambit: Hartlaub-Charlick Gambit 1. d4 e5 2. dxe5 d6 444 | A40 Englund Gambit: Main Line 1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 445 | A40 Englund Gambit: Mosquito Gambit 1. d4 e5 2. dxe5 Qh4 446 | A40 Englund Gambit: Soller Gambit 1. d4 e5 2. dxe5 f6 447 | A40 Englund Gambit: Soller Gambit Deferred 1. d4 e5 2. dxe5 Nc6 3. Nf3 f6 448 | A40 Englund Gambit: Stockholm Variation 1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 4. Qd5 449 | A40 Englund Gambit: Zilbermints Gambit 1. d4 e5 2. dxe5 Nc6 3. Nf3 Nge7 450 | A40 Horwitz Defense 1. d4 e6 451 | A40 Horwitz Defense: Zilbermints Gambit 1. d4 e6 2. c4 e5 452 | A40 Kangaroo Defense 1. d4 e6 2. c4 Bb4+ 453 | A40 Kangaroo Defense: Keres Defense, Transpositional Variation 1. d4 e6 2. c4 Bb4+ 3. Nc3 454 | A40 Mikenas Defense 1. d4 Nc6 455 | A40 Mikenas Defense: Cannstatter Variation 1. d4 Nc6 2. c4 e5 3. d5 Nd4 456 | A40 Mikenas Defense: Lithuanian Variation 1. d4 Nc6 2. c4 e5 3. d5 Nce7 457 | A40 Mikenas Defense: Pozarek Gambit 1. d4 Nc6 2. c4 e5 3. dxe5 Nxe5 4. Nc3 Nxc4 458 | A40 Modern Defense: Beefeater Variation 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 f5 459 | A40 Modern Defense: Lizard Defense, Pirc-Diemer Gambit 1. d4 g6 2. h4 Nf6 3. h5 460 | A40 Montevideo Defense 1. d4 Nc6 2. d5 Nb8 461 | A40 Polish Defense 1. d4 b5 462 | A40 Polish Defense: Spassky Gambit Accepted 1. d4 b5 2. e4 Bb7 3. Bxb5 463 | A40 Pterodactyl Defense: Central, Benoni Beefeater Pterodactyl 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 d6 5. e4 Bxc3+ 6. bxc3 Qa5 464 | A40 Pterodactyl Defense: Central, Benoni Pterodactyl 1. d4 g6 2. c4 Bg7 3. e4 c5 4. d5 Qa5+ 465 | A40 Pterodactyl Defense: Fianchetto, Queen Benoni Pterodactyl 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Qa5 466 | A40 Pterodactyl Defense: Fianchetto, Queen Pteranodon 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 Qa5 467 | A40 Pterodactyl Defense: Fianchetto, Queen Pterodactyl 1. d4 g6 2. Nf3 Bg7 3. g3 c5 4. Bg2 Qa5+ 468 | A40 Pterodactyl Defense: Queen Pterodactyl, Quiet Line 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. e3 469 | A40 Queen's Pawn Game 1. d4 470 | A40 Queen's Pawn Game: Anglo-Slav Opening 1. d4 c6 2. c4 d6 471 | A40 Queen's Pawn Game: Modern Defense 1. d4 g6 472 | A40 Slav Indian: Kudischewitsch Gambit 1. d4 c6 2. Nf3 Nf6 3. c4 b5 473 | A40 Zaire Defense 1. d4 Nc6 2. d5 Nb8 3. e4 Nf6 4. e5 Ng8 474 | A41 Modern Defense 1. d4 g6 2. c4 Bg7 3. Nc3 d6 475 | A41 Modern Defense: Neo-Modern Defense 1. d4 g6 2. c4 Bg7 3. e4 e5 476 | A41 Old Indian Defense 1. d4 d6 2. c4 477 | A41 Queen's Pawn Game 1. d4 d6 478 | A41 Rat Defense: English Rat 1. d4 d6 2. c4 e5 479 | A41 Rat Defense: English Rat, Lisbon Gambit 1. d4 d6 2. c4 e5 3. dxe5 Nc6 480 | A41 Rat Defense: English Rat, Pounds Gambit 1. d4 d6 2. c4 e5 3. dxe5 Be6 481 | A41 Robatsch Defense 1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. e4 Bg4 482 | A41 Wade Defense 1. d4 d6 2. Nf3 Bg4 483 | A41 Zukertort Opening: Wade Defense, Chigorin Plan 1. d4 d6 2. Nf3 Bg4 3. c4 Nd7 4. Qb3 Rb8 484 | A42 Modern Defense: Averbakh System 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 485 | A42 Modern Defense: Averbakh Variation, Pseudo-Sämisch 1. d4 g6 2. c4 Bg7 3. e4 d6 4. Be3 Nf6 5. f3 486 | A42 Modern Defense: Kotov Variation 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6 487 | A42 Modern Defense: Randspringer Variation 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 f5 488 | A42 Pterodactyl Defense 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+ 5. Nc3 d6 489 | A42 Pterodactyl Defense: Central, Bogolubovia 1. d4 g6 2. c4 Bg7 3. e4 d6 4. Nc3 c5 5. Nge2 Qa5 490 | A43 Benoni Defense: Benoni Gambit Accepted 1. d4 c5 2. dxc5 491 | A43 Benoni Defense: Benoni Gambit, Schlenker Defense 1. d4 c5 2. dxc5 Na6 492 | A43 Benoni Defense: Benoni-Indian Defense 1. d4 c5 2. d5 Nf6 493 | A43 Benoni Defense: Benoni-Indian Defense, Kingside Move Order 1. d4 c5 2. d5 Nf6 3. Nf3 494 | A43 Benoni Defense: Benoni-Staunton Gambit 1. d4 c5 2. d5 f5 3. e4 495 | A43 Benoni Defense: Cormorant Gambit 1. d4 c5 2. dxc5 b6 496 | A43 Benoni Defense: French Benoni 1. e4 e6 2. d4 c5 3. d5 497 | A43 Benoni Defense: Hawk Variation 1. d4 Nf6 2. Nf3 c5 3. d5 c4 498 | A43 Benoni Defense: Old Benoni 1. d4 c5 499 | A43 Benoni Defense: Old Benoni 1. d4 c5 2. d5 500 | A43 Benoni Defense: Old Benoni 1. d4 c5 2. d5 d6 501 | A43 Benoni Defense: Old Benoni, Mujannah Formation 1. d4 c5 2. d5 f5 502 | A43 Benoni Defense: Old Benoni, Schmid Variation 1. d4 c5 2. d5 d6 3. Nc3 g6 503 | A43 Benoni Defense: Snail Variation 1. d4 c5 2. d5 Na6 504 | A43 Benoni Defense: Woozle 1. d4 c5 2. d5 Nf6 3. Nc3 Qa5 505 | A43 Benoni Defense: Zilbermints-Benoni Gambit 1. d4 c5 2. b4 506 | A43 Benoni Defense: Zilbermints-Benoni Gambit 1. d4 c5 2. Nf3 cxd4 3. b4 507 | A43 Benoni Defense: Zilbermints-Benoni Gambit, Tamarkin Countergambit 1. d4 c5 2. Nf3 cxd4 3. b4 e5 508 | A43 Indian Defense: Pseudo-Benko 1. d4 Nf6 2. Nf3 c5 3. d5 b5 509 | A43 Queen's Pawn Game: Liedmann Gambit 1. d4 c5 2. c4 cxd4 3. e3 510 | A44 Benoni Defense: Old Benoni 1. d4 c5 2. d5 e5 511 | A44 Benoni Defense: Semi-Benoni 1. d4 c5 2. d5 e5 3. e4 d6 512 | A45 Amazon Attack: Siberian Attack 1. d4 Nf6 2. Nc3 d5 3. Qd3 513 | A45 Canard Opening 1. d4 Nf6 2. f4 514 | A45 Indian Defense 1. d4 Nf6 515 | A45 Indian Defense: Gedult Attack 1. d4 Nf6 2. f3 d5 3. g4 516 | A45 Indian Defense: Gibbins-Weidenhagen Gambit 1. d4 Nf6 2. g4 517 | A45 Indian Defense: Gibbins-Weidenhagen Gambit Accepted 1. d4 Nf6 2. g4 Nxg4 518 | A45 Indian Defense: Gibbins-Weidenhagen Gambit, Maltese Falcon 1. d4 Nf6 2. g4 Nxg4 3. f3 Nf6 4. e4 519 | A45 Indian Defense: Gibbins-Weidenhagen Gambit, Oshima Defense 1. d4 Nf6 2. g4 e5 520 | A45 Indian Defense: Gibbins-Weidenhagen Gambit, Stummer Gambit 1. d4 Nf6 2. g4 Nxg4 3. e4 d6 4. Be2 Nf6 5. Nc3 521 | A45 Indian Defense: Lazard Gambit 1. d4 Nf6 2. Nd2 e5 522 | A45 Indian Defense: Maddigan Gambit 1. d4 Nf6 2. Nc3 e5 523 | A45 Indian Defense: Omega Gambit 1. d4 Nf6 2. e4 524 | A45 Indian Defense: Omega Gambit, Arafat Gambit 1. d4 Nf6 2. e4 Nxe4 3. Bd3 Nf6 4. Bg5 525 | A45 Indian Defense: Paleface Attack, Blackmar-Diemer Gambit Deferred 1. d4 Nf6 2. f3 d5 3. e4 526 | A45 Indian Defense: Pawn Push Variation 1. d4 Nf6 2. d5 527 | A45 Indian Defense: Reversed Chigorin Defense 1. d4 Nf6 2. Nc3 c5 528 | A45 Indian Defense: Tartakower Attack 1. d4 Nf6 2. g3 529 | A45 Paleface Attack 1. d4 Nf6 2. f3 530 | A45 Queen's Pawn Game: Chigorin Variation 1. d4 Nf6 2. Nc3 d5 531 | A45 Queen's Pawn Game: Veresov, Richter Attack 1. d4 Nf6 2. f3 d5 3. Nc3 532 | A45 Trompowsky Attack 1. d4 Nf6 2. Bg5 533 | A45 Trompowsky Attack: Borg Variation 1. d4 Nf6 2. Bg5 Ne4 3. Bf4 g5 534 | A45 Trompowsky Attack: Classical Defense 1. d4 Nf6 2. Bg5 e6 535 | A45 Trompowsky Attack: Classical Defense, Big Center Variation 1. d4 Nf6 2. Bg5 e6 3. e4 536 | A45 Trompowsky Attack: Edge Variation 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 537 | A45 Trompowsky Attack: Edge Variation, Hergert Gambit 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 c6 4. Nd2 Qa5 5. c3 Nxd2 6. Qxd2 d5 7. e4 538 | A45 Trompowsky Attack: Edge Variation, Hergert Gambit 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 d5 4. f3 Nf6 5. Nc3 Bf5 6. e4 539 | A45 Trompowsky Attack: Poisoned Pawn Variation 1. d4 Nf6 2. Bg5 c5 3. d5 Qb6 4. Nc3 540 | A45 Trompowsky Attack: Raptor Variation 1. d4 Nf6 2. Bg5 Ne4 3. h4 541 | A45 Trompowsky Attack: Raptor Variation, Hergert Gambit 1. d4 Nf6 2. Bg5 Ne4 3. h4 Nxg5 4. hxg5 e5 542 | A46 Döry Defense 1. d4 Nf6 2. Nf3 Ne4 543 | A46 Indian Defense: Czech-Indian 1. d4 Nf6 2. Nf3 c6 544 | A46 Indian Defense: Knights Variation 1. d4 Nf6 2. Nf3 545 | A46 Indian Defense: Knights Variation, Alburt-Miles Variation 1. d4 Nf6 2. Nf3 a6 546 | A46 Indian Defense: London System 1. d4 Nf6 2. Nf3 e6 3. Bf4 547 | A46 Indian Defense: Polish Variation 1. d4 Nf6 2. Nf3 b5 548 | A46 Indian Defense: Spielmann-Indian 1. d4 Nf6 2. Nf3 c5 549 | A46 Indian Defense: Wade-Tartakower Defense 1. d4 Nf6 2. Nf3 d6 550 | A46 Queen's Pawn Game: Torre Attack, Breyer Variation 1. d4 Nf6 2. Nf3 e6 3. Bg5 d5 4. e3 c5 5. c3 Qb6 551 | A46 Queen's Pawn Game: Veresov Attack, Classical Defense 1. d4 Nf6 2. Nf3 e6 3. Nc3 d5 4. Bg5 552 | A46 Torre Attack: Classical Defense 1. d4 Nf6 2. Nf3 e6 3. Bg5 553 | A46 Torre Attack: Classical Defense, Nimzowitsch Variation 1. d4 Nf6 2. Nf3 e6 3. Bg5 h6 554 | A46 Torre Attack: Classical Defense, Petrosian Gambit 1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e3 b6 5. d5 555 | A46 Torre Attack: Wagner Gambit 1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e4 556 | A46 Yusupov-Rubinstein System 1. d4 Nf6 2. Nf3 e6 3. e3 557 | A47 Indian Defense: Schnepper Gambit 1. d4 Nf6 2. Nf3 b6 3. c3 e5 558 | A47 Marienbad System 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 559 | A47 Marienbad System: Berg Variation 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. c4 cxd4 6. Qxd4 560 | A47 Pseudo Queen's Indian Defense 1. d4 Nf6 2. Nf3 b6 561 | A48 East Indian Defense 1. d4 Nf6 2. Nf3 g6 562 | A48 Indian Defense: Colle System, King's Indian Variation 1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 4. Bd3 d6 563 | A48 London System 1. d4 Nf6 2. Nf3 g6 3. Bf4 564 | A48 Queen's Pawn Game: Barry Attack 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 565 | A48 Queen's Pawn Game: Barry Attack 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 566 | A48 Queen's Pawn Game: Barry Attack, Grünfeld Variation 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Be2 567 | A48 Queen's Pawn Game: Barry Attack, Tarzan Attack 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. Qd2 568 | A48 Queen's Pawn Game: Torre Attack, Grünfeld Variation, Main Line 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 O-O 569 | A48 Torre Attack: Fianchetto Defense 1. d4 Nf6 2. Nf3 g6 3. Bg5 570 | A48 Torre Attack: Fianchetto Defense, Euwe Variation 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 c5 571 | A49 Indian Defense: Przepiorka Variation 1. d4 Nf6 2. Nf3 g6 3. g3 572 | A50 Indian Defense: Medusa Gambit 1. d4 Nf6 2. c4 g5 573 | A50 Indian Defense: Normal Variation 1. d4 Nf6 2. c4 574 | A50 Indian Defense: Pyrenees Gambit 1. d4 Nf6 2. c4 b5 575 | A50 Mexican Defense 1. d4 Nf6 2. c4 Nc6 576 | A50 Mexican Defense: Horsefly Gambit 1. d4 Nf6 2. c4 Nc6 3. d5 Ne5 4. f4 577 | A50 Queen's Indian Accelerated 1. d4 Nf6 2. c4 b6 578 | A50 Slav Indian 1. d4 Nf6 2. c4 c6 579 | A51 Indian Defense: Budapest Defense 1. d4 Nf6 2. c4 e5 580 | A51 Indian Defense: Budapest Defense, Fajarowicz Defense, Bonsdorf Variation 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. a3 b6 581 | A51 Indian Defense: Budapest Defense, Fajarowicz Variation 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 582 | A51 Indian Defense: Budapest Defense, Fajarowicz-Steiner Variation 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. Qc2 583 | A52 Indian Defense: Budapest Defense 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 584 | A52 Indian Defense: Budapest Defense, Adler Variation 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 585 | A52 Indian Defense: Budapest Defense, Alekhine Variation 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 586 | A52 Indian Defense: Budapest Defense, Alekhine Variation, Abonyi Variation 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5 5. f4 Nec6 587 | A52 Indian Defense: Budapest Defense, Alekhine Variation, Tartakower Defense 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 d6 588 | A52 Indian Defense: Budapest Defense, Rubinstein Variation 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4 589 | A53 Old Indian Defense 1. d4 Nf6 2. c4 d6 590 | A53 Old Indian Defense: Aged Gibbon Gambit 1. d4 Nf6 2. c4 d6 3. g4 591 | A53 Old Indian Defense: Czech Variation, with Nc3 1. d4 Nf6 2. c4 d6 3. Nc3 c6 592 | A53 Old Indian Defense: Czech Variation, with Nf3 1. d4 Nf6 2. c4 d6 3. Nf3 c6 593 | A53 Old Indian Defense: Janowski Variation 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 594 | A53 Old Indian Defense: Janowski Variation, Fianchetto Variation 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. g3 595 | A53 Old Indian Defense: Janowski Variation, Grinberg Gambit 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. e4 596 | A53 Old Indian Defense: Janowski Variation, Main Line 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. f3 597 | A54 Old Indian Defense: Duz-Khotimirsky Variation 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. e3 Nbd7 5. Bd3 598 | A54 Old Indian Defense: Tartakower-Indian 1. d4 Nf6 2. c4 d6 3. Nf3 Bg4 599 | A54 Old Indian Defense: Two Knights Variation 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 600 | A54 Old Indian Defense: Ukrainian Variation 1. d4 Nf6 2. c4 d6 3. Nc3 e5 601 | A55 Old Indian Defense: Normal Variation 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3 602 | A56 Benoni Defense 1. d4 Nf6 2. c4 c5 603 | A56 Benoni Defense: Czech Benoni Defense 1. d4 Nf6 2. c4 c5 3. d5 e5 604 | A56 Benoni Defense: Hromádka System 1. d4 Nf6 2. c4 c5 3. d5 d6 605 | A56 Benoni Defense: King's Indian System 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 606 | A56 Benoni Defense: Weenink Variation 1. d4 Nf6 2. c4 c5 3. dxc5 e6 607 | A56 Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed Tarrasch 1. d4 Nf6 2. c4 c5 3. e3 g6 4. Nc3 Bg7 5. Nf3 O-O 6. Be2 cxd4 7. exd4 d5 8. O-O Nc6 608 | A56 Vulture Defense 1. d4 Nf6 2. c4 c5 3. d5 Ne4 609 | A57 Benko Gambit 1. d4 Nf6 2. c4 c5 3. d5 b5 610 | A57 Benko Gambit Accepted 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 611 | A57 Benko Gambit Accepted: Dlugy Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. f3 612 | A57 Benko Gambit Accepted: Modern Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. e3 613 | A57 Benko Gambit Accepted: Pawn Return Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. b6 614 | A57 Benko Gambit Declined: Bishop Attack 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Bg5 615 | A57 Benko Gambit Declined: Hjørring Countergambit 1. d4 Nf6 2. c4 c5 3. d5 b5 4. e4 616 | A57 Benko Gambit Declined: Main Line 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nf3 617 | A57 Benko Gambit Declined: Pseudo-Sämisch 1. d4 Nf6 2. c4 c5 3. d5 b5 4. f3 618 | A57 Benko Gambit Declined: Quiet Line 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nd2 619 | A57 Benko Gambit Declined: Sosonko Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4 620 | A57 Benko Gambit: Mutkin Countergambit 1. d4 Nf6 2. c4 c5 3. d5 b5 4. g4 621 | A57 Benko Gambit: Nescafe Frappe Attack 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 d6 8. Bc4 622 | A57 Benko Gambit: Zaitsev System 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 623 | A57 Benko Gambit: Zaitsev Variation, Nescafe Frappe Attack 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 624 | A58 Benko Gambit Accepted: Central Storming Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. f4 625 | A58 Benko Gambit Accepted: Fianchetto Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. g3 d6 8. Bg2 Bg7 9. Nf3 626 | A58 Benko Gambit Accepted: Fully Accepted Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 627 | A58 Benko Gambit: Fianchetto Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. g3 628 | A58 Benko Gambit: Nd2 Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. Nd2 629 | A59 Benko Gambit 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. g3 630 | A59 Benko Gambit Accepted: King Walk Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. Nf3 d6 8. e4 Bxf1 9. Kxf1 Bg7 10. g3 O-O 11. Kg2 631 | A59 Benko Gambit Accepted: Yugoslav 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 632 | A59 Benko Gambit Accepted: Yugoslav 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. Nge2 633 | A60 Benoni Defense: Modern Variation 1. d4 Nf6 2. c4 c5 3. d5 e6 634 | A60 Benoni Defense: Modern Variation, Snake Variation 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 Bd6 635 | A61 Benoni Defense 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 636 | A61 Benoni Defense: Fianchetto Variation 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. g3 637 | A61 Benoni Defense: Knight's Tour Variation 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Nd2 638 | A61 Benoni Defense: Uhlmann Variation 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg5 639 | A62 Benoni Defense: Fianchetto Variation 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 640 | A63 Benoni Defense: Fianchetto Variation, Hastings Defense 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O Nbd7 641 | A64 Benoni Defense: Fianchetto Variation, Hastings Defense, Main Line 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O a6 10. a4 Nbd7 11. Nd2 Re8 642 | A65 Benoni Defense: King's Pawn Line 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 643 | A66 Benoni Defense: Mikenas Variation 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. e5 644 | A66 Benoni Defense: Pawn Storm Variation 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 645 | A67 Benoni Defense: Taimanov Variation 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+ 646 | A68 Benoni Defense: Four Pawns Attack 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O 647 | A69 Benoni Defense: Four Pawns Attack, Main Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 Re8 648 | A70 Benoni Defense: Classical Variation 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 649 | A70 Benoni Defense: Classical Variation, New York Variation 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. h3 650 | A70 Benoni Defense: Classical Variation, Traditional Variation 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 651 | A71 Benoni Defense: Classical Variation, Averbakh-Grivas Attack 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Bg5 652 | A72 Benoni Defense: Classical Variation 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 653 | A73 Benoni Defense: Classical Variation, Main Line 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O 654 | A74 Benoni Defense: Classical Variation, Full Line 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O a6 10. a4 655 | A75 Benoni Defense: Classical Variation, Argentine Counterattack 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O a6 10. a4 Bg4 656 | A76 Benoni Defense: Classical Variation, Czerniak Defense 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 657 | A77 Benoni Defense: Classical Variation, Czerniak Defense, Tal Line 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 658 | A78 Benoni Defense: Classical Variation, Czerniak Defense 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6 659 | A79 Benoni Defense: Classical Variation, Czerniak Defense 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6 11. f3 660 | A80 Dutch Defense 1. d4 f5 661 | A80 Dutch Defense: Alapin Variation 1. d4 f5 2. Qd3 662 | A80 Dutch Defense: Hevendehl Gambit 1. d4 f5 2. g4 e5 663 | A80 Dutch Defense: Hopton Attack 1. d4 f5 2. Bg5 664 | A80 Dutch Defense: Janzen-Korchnoi Gambit 1. d4 f5 2. h3 Nf6 3. g4 665 | A80 Dutch Defense: Kingfisher Gambit 1. d4 f5 2. Nc3 d5 3. e4 666 | A80 Dutch Defense: Korchnoi Attack 1. d4 f5 2. h3 667 | A80 Dutch Defense: Krejcik Gambit 1. d4 f5 2. g4 668 | A80 Dutch Defense: Krejcik Gambit, Tate Gambit 1. d4 f5 2. g4 fxg4 3. e4 d5 4. Nc3 669 | A80 Dutch Defense: Manhattan Gambit, Anti-Classical Line 1. d4 f5 2. Qd3 e6 3. g4 670 | A80 Dutch Defense: Manhattan Gambit, Anti-Leningrad 1. d4 f5 2. Qd3 g6 3. g4 671 | A80 Dutch Defense: Manhattan Gambit, Anti-Modern 1. d4 f5 2. Qd3 d6 3. g4 672 | A80 Dutch Defense: Manhattan Gambit, Anti-Stonewall 1. d4 f5 2. Qd3 d5 3. g4 673 | A80 Dutch Defense: Omega-Isis Gambit 1. d4 f5 2. Nf3 e5 674 | A80 Dutch Defense: Raphael Variation 1. d4 f5 2. Nc3 675 | A80 Dutch Defense: Senechaud Gambit 1. d4 f5 2. Bf4 e6 3. g4 676 | A80 Dutch Defense: Spielmann Gambit 1. d4 f5 2. Nc3 Nf6 3. g4 677 | A80 Queen's Pawn Game: Veresov Attack, Dutch System 1. d4 f5 2. Nc3 d5 678 | A81 Dutch Defense: Blackburne Variation 1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nh3 679 | A81 Dutch Defense: Fianchetto Attack 1. d4 f5 2. g3 680 | A81 Dutch Defense: Leningrad Variation, Carlsbad Variation 1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3 681 | A81 Dutch Defense: Leningrad, Basman System 1. d4 f5 2. g3 c6 3. Bg2 g6 4. Nf3 Bg7 5. O-O Nh6 682 | A81 Dutch Defense: Semi-Leningrad Variation 1. d4 f5 2. g3 Nf6 3. Bg2 g6 683 | A82 Dutch Defense: Blackmar's Second Gambit 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. f3 684 | A82 Dutch Defense: Staunton Gambit 1. d4 f5 2. e4 685 | A82 Dutch Defense: Staunton Gambit Accepted 1. d4 f5 2. e4 fxe4 686 | A82 Dutch Defense: Staunton Gambit, American Attack 1. d4 f5 2. e4 fxe4 3. Nd2 687 | A82 Dutch Defense: Staunton Gambit, Tartakower Variation 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4 688 | A82 Rat Defense: Balogh Defense 1. e4 d6 2. d4 f5 689 | A83 Dutch Defense: Staunton Gambit 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 690 | A83 Dutch Defense: Staunton Gambit, Alekhine Variation 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. h4 691 | A83 Dutch Defense: Staunton Gambit, Chigorin Variation 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 c6 692 | A83 Dutch Defense: Staunton Gambit, Lasker Variation 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. f3 693 | A83 Dutch Defense: Staunton Gambit, Nimzowitsch Variation 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 b6 694 | A84 Dutch Defense 1. d4 f5 2. c4 695 | A84 Dutch Defense: Bellon Gambit 1. d4 f5 2. c4 e6 3. e4 696 | A84 Dutch Defense: Bladel Variation 1. d4 f5 2. c4 g6 3. Nc3 Nh6 697 | A84 Dutch Defense: Classical Variation 1. d4 f5 2. c4 e6 698 | A84 Dutch Defense: Krause Variation 1. d4 f5 2. c4 Nf6 3. Nc3 d6 4. Nf3 Nc6 699 | A84 Dutch Defense: Normal Variation 1. d4 f5 2. c4 Nf6 700 | A84 Dutch Defense: Rubinstein Variation 1. d4 f5 2. c4 e6 3. Nc3 701 | A85 Dutch Defense: Queen's Knight Variation 1. d4 f5 2. c4 Nf6 3. Nc3 702 | A86 Dutch Defense: Fianchetto Variation 1. d4 f5 2. c4 Nf6 3. g3 703 | A86 Dutch Defense: Hort-Antoshin System 1. d4 f5 2. c4 Nf6 3. g3 d6 4. Bg2 c6 5. Nc3 Qc7 704 | A86 Dutch Defense: Leningrad Variation 1. d4 f5 2. c4 Nf6 3. g3 g6 705 | A87 Dutch Defense: Leningrad Variation 1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 706 | A88 Dutch Defense: Leningrad Variation, Warsaw Variation 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 c6 707 | A89 Dutch Defense: Leningrad Variation, Matulovic Variation 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 Nc6 708 | A90 Dutch Defense: Classical Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 709 | A90 Dutch Defense: Classical Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 d5 5. Nf3 710 | A90 Dutch Defense: Nimzo-Dutch Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+ 711 | A90 Dutch Defense: Nimzo-Dutch Variation, Alekhine Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+ 5. Bd2 Be7 712 | A90 Dutch Defense: Stonewall Variation, Modern Variation 1. d4 f5 2. c4 e6 3. Nf3 Nf6 4. g3 c6 5. Bg2 d5 6. O-O Bd6 713 | A91 Dutch Defense: Classical Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 714 | A91 Dutch Defense: Classical Variation, Blackburne Attack 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nh3 715 | A92 Dutch Defense: Alekhine Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O Ne4 716 | A92 Dutch Defense: Classical Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 717 | A92 Dutch Defense: Stonewall Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 718 | A92 Dutch Defense: Stonewall Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 719 | A93 Dutch Defense: Stonewall Variation, Botvinnik Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3 720 | A94 Dutch Defense: Stonewall Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3 c6 8. Ba3 721 | A95 Dutch Defense: Stonewall Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6 722 | A95 Dutch Defense: Stonewall Variation, Chekhover Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6 8. Qc2 Qe8 9. Bg5 723 | A96 Dutch Defense: Classical Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 724 | A96 Dutch Defense: Classical Variation, Buenos Aires Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 a5 725 | A96 Dutch Defense: Classical Variation, Huisl Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Ne4 726 | A97 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 727 | A97 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Winter Variation 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. Re1 728 | A98 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Alatortsev-Lisitsyn Line 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. Qc2 729 | A99 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Modern Main Line 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. b3 730 | -------------------------------------------------------------------------------- /bin/gen.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/python3 2 | 3 | import io 4 | import re 5 | import sys 6 | 7 | from typing import Dict, List, TextIO 8 | 9 | try: 10 | import chess 11 | import chess.pgn 12 | except ImportError: 13 | print("Need python-chess:", file=sys.stderr) 14 | print("$ pip3 install chess", file=sys.stderr) 15 | print(file=sys.stderr) 16 | raise 17 | 18 | 19 | ECO_REGEX = re.compile(r"^[A-E]\d\d\Z") 20 | 21 | INVALID_SPACE = re.compile(r"\s{2,}|^\s|\s\Z|\s,") 22 | 23 | INVALID_WITH = re.compile(r"[^,:]\swith\b") 24 | 25 | 26 | class Stats: 27 | def __init__(self) -> None: 28 | self.errors = 0 29 | self.warnings = 0 30 | 31 | class Reporter: 32 | def __init__(self, stats: Stats, file_name: str) -> None: 33 | self.stats = stats 34 | self.file_name = file_name 35 | 36 | def error(self, lno: int, err_msg: str) -> None: 37 | print(f"::error file={self.file_name},line={lno}::{err_msg}", file=sys.stderr) 38 | self.stats.errors += 1 39 | 40 | def warning(self, lno: int, err_msg: str) -> None: 41 | print(f"::warning file={self.file_name},line={lno}::{err_msg}", file=sys.stderr) 42 | self.stats.warnings += 1 43 | 44 | 45 | def main(f: TextIO, reporter: Reporter, by_epd: Dict[str, List[str]], shortest_by_name: Dict[str, int]) -> None: 46 | prev_eco = "" 47 | prev_name = "" 48 | 49 | for lno, line in enumerate(f, 1): 50 | cols = line.rstrip("\n").split("\t") 51 | 52 | if len(cols) != 3: 53 | reporter.error(lno, f"expected 3 columns, got {len(cols)}") 54 | continue 55 | 56 | if lno == 1: 57 | if cols != ["eco", "name", "pgn"]: 58 | reporter.error(lno, f"expected eco, name, pgn") 59 | continue 60 | 61 | eco, name, pgn = cols 62 | 63 | if not ECO_REGEX.match(eco): 64 | reporter.error(lno, f"invalid eco") 65 | continue 66 | 67 | if INVALID_SPACE.search(name): 68 | reporter.error(lno, f"invalid whitespace in name") 69 | continue 70 | 71 | try: 72 | board = chess.pgn.read_game(io.StringIO(pgn), Visitor=chess.pgn.BoardBuilder) 73 | except ValueError as err: 74 | reporter.error(lno, f"{err}") 75 | continue 76 | 77 | if not board: 78 | reporter.error(lno, f"Empty pgn") 79 | continue 80 | 81 | allowed_lowers = ["with", "de", "der", "del", "von", "and"] 82 | if not all([word[0].isupper() for word in re.split(r"\s|-", name) if word not in allowed_lowers and word.isalpha()]): 83 | reporter.warning(lno, f"{name!r} word(s) beginning with lowercase letters") 84 | 85 | if INVALID_WITH.search(name): 86 | reporter.warning(lno, f"'with' not separated with ',' or ':'") 87 | 88 | for blacklisted in ["refused"]: 89 | if blacklisted in name.lower(): 90 | reporter.warning(lno, f"blacklisted word ({blacklisted!r} in {name!r})") 91 | 92 | 93 | if shortest_by_name.get(name, -1) == len(board.move_stack): 94 | reporter.warning(lno, f"{name!r} does not have a unique shortest line") 95 | try: 96 | shortest_by_name[name] = min(shortest_by_name[name], len(board.move_stack)) 97 | except KeyError: 98 | shortest_by_name[name] = len(board.move_stack) 99 | 100 | clean_pgn = chess.Board().variation_san(board.move_stack) 101 | if clean_pgn != pgn: 102 | reporter.error(lno, f"unclean pgn: expected {clean_pgn!r}, got {pgn!r}") 103 | 104 | if name.count(":") > 1: 105 | reporter.error(lno, f"multiple ':' in name: {name}") 106 | 107 | epd = board.epd() 108 | if epd in by_epd: 109 | reporter.error(lno, f"duplicate epd: {by_epd[epd]}") 110 | else: 111 | by_epd[epd] = cols 112 | 113 | if eco < prev_eco: 114 | reporter.error(lno, f"not ordered by eco ({eco} after {prev_eco})") 115 | elif (eco, name) < (prev_eco, prev_name): 116 | reporter.error(lno, f"not ordered by name ({name!r} after {prev_name!r})") 117 | prev_eco = eco 118 | prev_name = name 119 | 120 | print(eco, name, clean_pgn, " ".join(m.uci() for m in board.move_stack), epd, sep="\t") 121 | 122 | 123 | if __name__ == "__main__": 124 | if len(sys.argv) <= 1: 125 | print(f"Usage: {sys.argv[0]} *.tsv", file=sys.stderr) 126 | sys.exit(2) 127 | 128 | print("eco", "name", "pgn", "uci", "epd", sep="\t") 129 | 130 | stats = Stats() 131 | by_epd: Dict[str, List[str]] = {} 132 | shortest_by_name: Dict[str, int] = {} 133 | for file_name in sys.argv[1:]: 134 | with open(file_name) as f: 135 | main(f, Reporter(stats, file_name), by_epd, shortest_by_name) 136 | if stats.errors: 137 | sys.exit(1) 138 | -------------------------------------------------------------------------------- /bin/requirements.txt: -------------------------------------------------------------------------------- 1 | chess>=1,<2 2 | -------------------------------------------------------------------------------- /d.tsv: -------------------------------------------------------------------------------- 1 | eco name pgn 2 | D00 Amazon Attack 1. d4 d5 2. Qd3 3 | D00 Blackmar-Diemer Gambit 1. d4 d5 2. e4 4 | D00 Blackmar-Diemer Gambit 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 5 | D00 Blackmar-Diemer Gambit Accepted 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 6 | D00 Blackmar-Diemer Gambit Accepted: Bogoljubow Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 7 | D00 Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Kloss Attack 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. O-O O-O 8. Kh1 8 | D00 Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Mad Dog Attack 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. h4 9 | D00 Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Nimzowitsch Attack 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. Ne5 10 | D00 Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Studier Attack 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. O-O O-O 8. Qe1 11 | D00 Blackmar-Diemer Gambit Accepted: Euwe Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 e6 12 | D00 Blackmar-Diemer Gambit Accepted: Euwe Defense, Zilbermints Gambit 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 e6 6. Bg5 Be7 7. Bd3 Nc6 8. O-O Nxd4 9. Kh1 13 | D00 Blackmar-Diemer Gambit Accepted: Gunderam Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bf5 14 | D00 Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bf5 6. Ne5 e6 7. g4 Be4 15 | D00 Blackmar-Diemer Gambit Accepted: Holwell Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Qd6 16 | D00 Blackmar-Diemer Gambit Accepted: Kaulich Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 c5 17 | D00 Blackmar-Diemer Gambit Accepted: Pietrowsky Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Nc6 18 | D00 Blackmar-Diemer Gambit Accepted: Ritter Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 b6 19 | D00 Blackmar-Diemer Gambit Accepted: Ryder Gambit 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3 20 | D00 Blackmar-Diemer Gambit Accepted: Schlutter Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Nbd7 21 | D00 Blackmar-Diemer Gambit Accepted: Teichmann Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 22 | D00 Blackmar-Diemer Gambit Accepted: Teichmann Defense, Ciesielski Variation 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bxf3 7. Qxf3 c6 8. Qf2 23 | D00 Blackmar-Diemer Gambit Accepted: Teichmann Defense, Classical Variation 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bxf3 7. Qxf3 c6 8. Be3 24 | D00 Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bxf3 7. Qxf3 c6 8. g4 25 | D00 Blackmar-Diemer Gambit Accepted: Ziegler Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 c6 26 | D00 Blackmar-Diemer Gambit Declined: Brombacher Countergambit 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c5 27 | D00 Blackmar-Diemer Gambit Declined: Elbert Countergambit 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e5 28 | D00 Blackmar-Diemer Gambit Declined: Gedult Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 a6 29 | D00 Blackmar-Diemer Gambit Declined: Lamb Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 Nc6 30 | D00 Blackmar-Diemer Gambit Declined: Langeheinicke Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e3 31 | D00 Blackmar-Diemer Gambit Declined: O'Kelly Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c6 32 | D00 Blackmar-Diemer Gambit Declined: Vienna Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 Bf5 33 | D00 Blackmar-Diemer Gambit Declined: Weinsbach Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e6 34 | D00 Blackmar-Diemer Gambit: Blackmar Gambit 1. d4 d5 2. e4 dxe4 3. f3 35 | D00 Blackmar-Diemer Gambit: Diemer-Rosenberg Attack 1. d4 d5 2. e4 dxe4 3. Be3 36 | D00 Blackmar-Diemer Gambit: Fritz Attack 1. d4 d5 2. e4 dxe4 3. Bc4 37 | D00 Blackmar-Diemer Gambit: Lemberger Countergambit 1. d4 d5 2. e4 dxe4 3. Nc3 e5 38 | D00 Blackmar-Diemer Gambit: Lemberger Countergambit, Endgame Variation 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. dxe5 39 | D00 Blackmar-Diemer Gambit: Lemberger Countergambit, Lange Gambit 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Nxe4 40 | D00 Blackmar-Diemer Gambit: Lemberger Countergambit, Rasmussen Attack 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Nge2 41 | D00 Blackmar-Diemer Gambit: Lemberger Countergambit, Sneiders Attack 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Qh5 42 | D00 Blackmar-Diemer Gambit: Lemberger Countergambit, Soller Attack 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Be3 43 | D00 Blackmar-Diemer Gambit: Netherlands Variation 1. d4 d5 2. e4 dxe4 3. Nc3 f5 44 | D00 Blackmar-Diemer Gambit: Rasa-Studier Gambit 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Be3 45 | D00 Blackmar-Diemer Gambit: Reversed Albin Countergambit 1. d4 d5 2. e4 dxe4 3. Nc3 c5 46 | D00 Blackmar-Diemer Gambit: Zeller Defense 1. d4 d5 2. e4 dxe4 3. Nc3 Bf5 47 | D00 Blackmar-Diemer Gambit: Zeller Defense, Soller Attack 1. d4 d5 2. e4 dxe4 3. Nc3 Bf5 4. f3 Nf6 5. Bc4 48 | D00 Blackmar-Diemer Gambit: von Popiel Gambit 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Bg5 49 | D00 Blackmar-Diemer Gambit: von Popiel Gambit, Zilbermints Variation 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Bg5 Bf5 5. Bxf6 exf6 6. g4 Bg6 7. Qe2 Bb4 8. Qb5+ 50 | D00 Queen's Pawn Game 1. d4 d5 51 | D00 Queen's Pawn Game 1. d4 d5 2. e3 52 | D00 Queen's Pawn Game 1. d4 d5 2. e3 Nf6 53 | D00 Queen's Pawn Game: Accelerated London System 1. d4 d5 2. Bf4 54 | D00 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit 1. d4 d5 2. Bf4 c5 55 | D00 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit Accepted 1. d4 d5 2. Bf4 c5 3. dxc5 56 | D00 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit 1. d4 d5 2. Bf4 c5 3. e4 57 | D00 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit Accepted 1. d4 d5 2. Bf4 c5 3. e4 dxe4 58 | D00 Queen's Pawn Game: Chigorin Variation 1. d4 d5 2. Nc3 59 | D00 Queen's Pawn Game: Chigorin Variation 1. d4 d5 2. Nc3 e6 60 | D00 Queen's Pawn Game: Chigorin Variation, Alburt Defense 1. d4 d5 2. Nc3 Bf5 61 | D00 Queen's Pawn Game: Chigorin Variation, Anti-Veresov 1. d4 d5 2. Nc3 Bg4 62 | D00 Queen's Pawn Game: Chigorin Variation, Fianchetto Defense 1. d4 g6 2. Nf3 Bg7 3. Nc3 d5 63 | D00 Queen's Pawn Game: Chigorin Variation, Irish Gambit 1. d4 d5 2. Nc3 c5 64 | D00 Queen's Pawn Game: Chigorin Variation, Shaviliuk Gambit 1. d4 d5 2. Nc3 e5 65 | D00 Queen's Pawn Game: Chigorin Variation, Shropshire Defense 1. d4 d5 2. Nc3 h5 66 | D00 Queen's Pawn Game: Hübsch Gambit 1. d4 Nf6 2. Nc3 d5 3. e4 67 | D00 Queen's Pawn Game: Levitsky Attack 1. d4 d5 2. Bg5 68 | D00 Queen's Pawn Game: Levitsky Attack, Welling Variation 1. d4 d5 2. Bg5 Bg4 69 | D00 Queen's Pawn Game: Mason Attack 1. d4 d5 2. f4 70 | D00 Queen's Pawn Game: Stonewall Attack 1. d4 d5 2. e3 Nf6 3. Bd3 71 | D00 Queen's Pawn Game: Zurich Gambit 1. d4 d5 2. g4 72 | D01 Rapport-Jobava System 1. d4 d5 2. Nc3 Nf6 3. Bf4 73 | D01 Rapport-Jobava System 1. d4 d5 2. Nc3 Nf6 3. Bf4 e6 74 | D01 Rapport-Jobava System 1. d4 d5 2. Nc3 Nf6 3. Bf4 g6 75 | D01 Rapport-Jobava System, with e6 1. d4 d5 2. Nc3 e6 3. Bf4 76 | D01 Richter-Veresov Attack 1. d4 Nf6 2. Nc3 d5 3. Bg5 77 | D01 Richter-Veresov Attack 1. d4 Nf6 2. Nc3 d5 3. Bg5 Bf5 78 | D01 Richter-Veresov Attack: Boyce Defense 1. d4 Nf6 2. Nc3 d5 3. Bg5 Ne4 79 | D01 Richter-Veresov Attack: Malich Gambit 1. d4 Nf6 2. Nc3 d5 3. Bg5 c5 4. Bxf6 gxf6 5. e4 dxe4 6. d5 80 | D01 Richter-Veresov Attack: Richter Variation 1. d4 Nf6 2. Nc3 d5 3. Bg5 Bf5 4. f3 81 | D01 Richter-Veresov Attack: Two Knights System 1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3 82 | D01 Richter-Veresov Attack: Two Knights System, Grünfeld Defense 1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3 g6 83 | D01 Richter-Veresov Attack: Veresov Variation 1. d4 Nf6 2. Nc3 d5 3. Bg5 Bf5 4. Bxf6 84 | D02 London System: Poisoned Pawn Variation 1. d4 Nf6 2. Nf3 d5 3. Bf4 c5 4. e3 Qb6 5. Nc3 85 | D02 Queen's Gambit Declined: Baltic Defense, Pseudo-Slav 1. d4 d5 2. Nf3 Bf5 3. c4 e6 4. Nc3 c6 86 | D02 Queen's Pawn Game: Anti-Torre 1. Nf3 d5 2. d4 Bg4 87 | D02 Queen's Pawn Game: Chandler Gambit 1. d4 d5 2. Nf3 c5 3. g3 cxd4 4. Bg2 88 | D02 Queen's Pawn Game: Chigorin Variation 1. d4 d5 2. Nf3 Nc6 89 | D02 Queen's Pawn Game: Krause Variation 1. d4 d5 2. Nf3 c5 90 | D02 Queen's Pawn Game: Levitsky Attack, Euwe Variation, Modern Line 1. d4 d5 2. Nf3 c6 3. Bg5 h6 4. Bh4 Qb6 91 | D02 Queen's Pawn Game: London System 1. d4 d5 2. Nf3 Nf6 3. Bf4 92 | D02 Queen's Pawn Game: London System, Pterodactyl Variation 1. d4 g6 2. Nf3 Bg7 3. Bf4 c5 4. c3 cxd4 5. cxd4 Qa5+ 93 | D02 Queen's Pawn Game: London System, with e6 1. d4 d5 2. Nf3 e6 3. Bf4 94 | D02 Queen's Pawn Game: Symmetrical Variation 1. d4 d5 2. Nf3 Nf6 95 | D02 Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan 1. d4 d5 2. Nf3 Nf6 3. g3 96 | D02 Queen's Pawn Game: Zilbermints Countergambit 1. d4 d5 2. Nf3 Nf6 3. c4 b5 97 | D02 Queen's Pawn Game: Zukertort Variation 1. d4 d5 2. Nf3 98 | D03 Queen's Pawn Game: Torre Attack 1. d4 d5 2. Nf3 Nf6 3. Bg5 99 | D03 Queen's Pawn Game: Torre Attack, Gossip Variation 1. d4 d5 2. Nf3 Nf6 3. Bg5 Ne4 100 | D03 Queen's Pawn Game: Torre Attack, Grünfeld Variation 1. d4 d5 2. Nf3 Nf6 3. Bg5 g6 101 | D04 Queen's Pawn Game: Colle System 1. d4 d5 2. Nf3 Nf6 3. e3 102 | D04 Queen's Pawn Game: Colle System, Anti-Colle 1. d4 d5 2. Nf3 Nf6 3. e3 Bf5 103 | D04 Queen's Pawn Game: Colle System, Grünfeld Formation 1. d4 d5 2. Nf3 Nf6 3. e3 g6 4. Bd3 Bg7 104 | D05 Queen's Pawn Game: Colle System 1. d4 d5 2. Nf3 Nf6 3. e3 e6 105 | D05 Queen's Pawn Game: Colle System 1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 106 | D05 Queen's Pawn Game: Colle System, Traditional Colle 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. c3 107 | D05 Queen's Pawn Game: Zukertort Variation 1. d4 d5 2. Nf3 c5 3. e3 Nf6 4. Nbd2 e6 5. b3 108 | D05 Rubinstein Opening 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3 109 | D05 Rubinstein Opening: Bogoljubow Defense 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3 Nc6 6. O-O Bd6 7. Bb2 O-O 110 | D05 Rubinstein Opening: Classical Defense 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3 Nc6 6. O-O Be7 7. Bb2 O-O 111 | D05 Rubinstein Opening: Semi-Slav Defense 1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 Bd6 5. O-O O-O 6. b3 Nbd7 7. Bb2 112 | D05 Rubinstein Opening: Semi-Slav Defense 1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 Bd6 5. O-O O-O 6. b3 Nbd7 7. Bb2 c6 113 | D05 Rubinstein Opening: Semi-Slav Defense 1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 Bd6 5. O-O O-O 6. b3 Nbd7 7. Bb2 c6 8. Nbd2 114 | D06 Queen's Gambit 1. d4 d5 2. c4 115 | D06 Queen's Gambit Declined: Austrian Attack, Salvio Countergambit 1. d4 d5 2. c4 c5 3. dxc5 d4 116 | D06 Queen's Gambit Declined: Austrian Defense 1. d4 d5 2. c4 c5 117 | D06 Queen's Gambit Declined: Austrian Defense, Gusev Countergambit 1. d4 d5 2. c4 c5 3. cxd5 Nf6 118 | D06 Queen's Gambit Declined: Austrian Defense, Haberditz Variation 1. d4 d5 2. c4 c5 3. cxd5 Nf6 4. e4 Nxe4 5. dxc5 Qa5+ 119 | D06 Queen's Gambit Declined: Baltic Defense 1. d4 d5 2. c4 Bf5 120 | D06 Queen's Gambit Declined: Baltic Defense, Argentinian Gambit 1. d4 d5 2. c4 Bf5 3. cxd5 Bxb1 4. Qa4+ c6 5. dxc6 Nxc6 121 | D06 Queen's Gambit Declined: Baltic Defense, Pseudo-Chigorin 1. d4 d5 2. c4 Bf5 3. Nc3 e6 4. Nf3 Nc6 122 | D06 Queen's Gambit Declined: Baltic Defense, Queen Attack 1. d4 d5 2. c4 Bf5 3. Qb3 123 | D06 Queen's Gambit Declined: Baltic Defense, Queen Attack Deferred 1. d4 d5 2. c4 Bf5 3. Nc3 e6 4. Qb3 124 | D06 Queen's Gambit Declined: Marshall Defense 1. d4 d5 2. c4 Nf6 125 | D06 Queen's Gambit Declined: Marshall Defense, Tan Gambit 1. d4 d5 2. c4 Nf6 3. cxd5 c6 126 | D06 Queen's Gambit Declined: Zilbermints Gambit 1. d4 d5 2. c4 b5 127 | D07 Queen's Gambit Declined: Chigorin Defense 1. d4 d5 2. c4 Nc6 128 | D07 Queen's Gambit Declined: Chigorin Defense 1. d4 d5 2. c4 Nc6 3. Nc3 129 | D07 Queen's Gambit Declined: Chigorin Defense 1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 130 | D07 Queen's Gambit Declined: Chigorin Defense, Exchange Variation 1. d4 d5 2. c4 Nc6 3. cxd5 Qxd5 131 | D07 Queen's Gambit Declined: Chigorin Defense, Exchange Variation, Costa's Line 1. d4 d5 2. c4 Nc6 3. cxd5 Qxd5 4. e3 e5 5. Nc3 Bb4 6. Bd2 Bxc3 7. Bxc3 exd4 8. Ne2 132 | D07 Queen's Gambit Declined: Chigorin Defense, Janowski Variation 1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. Nf3 133 | D07 Queen's Gambit Declined: Chigorin Defense, Lazard Gambit 1. d4 d5 2. c4 Nc6 3. Nf3 e5 134 | D07 Queen's Gambit Declined: Chigorin Defense, Main Line 1. d4 d5 2. c4 Nc6 3. Nf3 Bg4 135 | D07 Queen's Gambit Declined: Chigorin Defense, Main Line, Alekhine Variation 1. d4 d5 2. c4 Nc6 3. Nf3 Bg4 4. Qa4 136 | D07 Queen's Gambit Declined: Chigorin Defense, Modern Gambit 1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. Nf3 Nf6 137 | D07 Queen's Gambit Declined: Chigorin Defense, Tartakower Gambit 1. d4 d5 2. c4 Nc6 3. Nc3 e5 138 | D08 Queen's Gambit Declined: Albin Countergambit 1. d4 d5 2. c4 e5 139 | D08 Queen's Gambit Declined: Albin Countergambit, Balogh Variation 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Qe7 140 | D08 Queen's Gambit Declined: Albin Countergambit, Janowski Variation 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 f6 141 | D08 Queen's Gambit Declined: Albin Countergambit, Krenosz Variation 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Bg4 6. h3 Bxf3 7. Nxf3 Bb4+ 8. Bd2 Qe7 142 | D08 Queen's Gambit Declined: Albin Countergambit, Lasker Trap 1. d4 d5 2. c4 e5 3. dxe5 d4 4. e3 Bb4+ 5. Bd2 dxe3 143 | D08 Queen's Gambit Declined: Albin Countergambit, Modern Line 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 144 | D08 Queen's Gambit Declined: Albin Countergambit, Normal Line 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 145 | D08 Queen's Gambit Declined: Albin Countergambit, Tartakower Defense 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 c5 146 | D09 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 147 | D09 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Be6 Line 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Be6 148 | D09 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Bf5 Line 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Bf5 149 | D09 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Bg4 Line 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Bg4 150 | D10 Slav Defense 1. d4 d5 2. c4 c6 151 | D10 Slav Defense 1. d4 d5 2. c4 c6 3. Nc3 152 | D10 Slav Defense 1. d4 d5 2. c4 c6 3. Nc3 dxc4 153 | D10 Slav Defense: Diemer Gambit 1. d4 d5 2. c4 c6 3. e4 154 | D10 Slav Defense: Exchange Variation 1. d4 d5 2. c4 c6 3. cxd5 155 | D10 Slav Defense: Exchange Variation, Boor Attack 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. f3 156 | D10 Slav Defense: Slav Gambit, Alekhine Attack 1. d4 d5 2. c4 c6 3. Nc3 dxc4 4. e4 157 | D10 Slav Defense: Winawer Countergambit 1. d4 d5 2. c4 c6 3. Nc3 e5 158 | D10 Slav Defense: Winawer Countergambit, Anti-Winawer Gambit 1. d4 d5 2. c4 c6 3. Nc3 e5 4. e4 159 | D11 Slav Defense: Bonet Gambit 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Bg5 160 | D11 Slav Defense: Breyer Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nbd2 161 | D11 Slav Defense: Modern Line 1. d4 d5 2. c4 c6 3. Nf3 162 | D11 Slav Defense: Modern Line 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. g3 dxc4 5. Bg2 g6 163 | D11 Slav Defense: Quiet Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 164 | D11 Slav Defense: Quiet Variation, Pin Defense 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bg4 165 | D12 Slav Defense: Quiet Variation, Amsterdam Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3 e6 7. Ne5 Nfd7 166 | D12 Slav Defense: Quiet Variation, Landau Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Qc8 7. Bd2 e6 8. Na3 167 | D12 Slav Defense: Quiet Variation, Schallopp Defense 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 168 | D13 Slav Defense: Exchange Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 169 | D13 Slav Defense: Exchange Variation, Schallopp Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3 170 | D14 Slav Defense: Exchange Variation, Symmetrical Line 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. Bf4 Bf5 171 | D14 Slav Defense: Exchange Variation, Trifunovic Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 e6 8. Qb3 Bb4 172 | D15 Slav Defense: Alekhine Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e3 173 | D15 Slav Defense: Chebanenko Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 174 | D15 Slav Defense: Chebanenko Variation, Advance System 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 5. c5 175 | D15 Slav Defense: Geller Gambit 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4 176 | D15 Slav Defense: Geller Gambit 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4 b5 6. e5 177 | D15 Slav Defense: Schlechter Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 g6 178 | D15 Slav Defense: Süchting Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 Qb6 179 | D15 Slav Defense: Three Knights Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 180 | D15 Slav Defense: Two Knights Attack 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 181 | D16 Slav Defense: Alapin Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 182 | D16 Slav Defense: Smyslov Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Na6 183 | D16 Slav Defense: Soultanbeieff Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 e6 184 | D16 Slav Defense: Steiner Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bg4 185 | D17 Slav Defense: Czech Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 186 | D17 Slav Defense: Czech Variation, Bled Attack 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Nh4 187 | D17 Slav Defense: Czech Variation, Carlsbad Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 188 | D17 Slav Defense: Czech Variation, Carlsbad Variation, Morozevich Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 9. dxe5 Nxe5 10. Bf4 Nfd7 11. Bg2 g5 189 | D17 Slav Defense: Czech Variation, Krause Attack 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 190 | D17 Slav Defense: Czech Variation, Krause Attack, Fazekas Gambit 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Na6 7. e4 191 | D17 Slav Defense: Czech Variation, Wiesbaden Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6 192 | D17 Slav Defense: Czech Variation, Wiesbaden Variation, Sharp Line 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6 7. f3 Bb4 8. e4 193 | D18 Slav Defense: Czech Variation, Classical System 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 194 | D18 Slav Defense: Czech Variation, Lasker Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 Na6 195 | D19 Slav Defense: Czech Variation, Classical System, Main Line 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2 196 | D19 Slav Defense: Czech Variation, Dutch Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O 197 | D19 Slav Defense: Czech Variation, Dutch Variation, Sämisch Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2 Ne4 10. g4 198 | D20 Queen's Gambit Accepted 1. d4 d5 2. c4 dxc4 199 | D20 Queen's Gambit Accepted: Accelerated Mannheim Variation 1. d4 d5 2. c4 dxc4 3. Qa4+ 200 | D20 Queen's Gambit Accepted: Central Variation, Alekhine System 1. d4 d5 2. c4 dxc4 3. e4 Nf6 201 | D20 Queen's Gambit Accepted: Central Variation, Greco Variation 1. d4 d5 2. c4 dxc4 3. e4 b5 202 | D20 Queen's Gambit Accepted: Central Variation, McDonnell Defense 1. d4 d5 2. c4 dxc4 3. e4 e5 203 | D20 Queen's Gambit Accepted: Central Variation, McDonnell Defense, Somov Gambit 1. d4 d5 2. c4 dxc4 3. e4 e5 4. Bxc4 204 | D20 Queen's Gambit Accepted: Central Variation, Modern Defense 1. d4 d5 2. c4 dxc4 3. e4 Nc6 205 | D20 Queen's Gambit Accepted: Central Variation, Rubinstein Defense 1. d4 d5 2. c4 dxc4 3. e4 c5 206 | D20 Queen's Gambit Accepted: Central Variation, Rubinstein Defense, Yefimov Gambit 1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 b5 207 | D20 Queen's Gambit Accepted: Linares Variation 1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 Nf6 5. Nc3 b5 208 | D20 Queen's Gambit Accepted: Old Variation 1. d4 d5 2. c4 dxc4 3. e3 209 | D20 Queen's Gambit Accepted: Old Variation, Billinger Gambit 1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. a3 210 | D20 Queen's Gambit Accepted: Old Variation, Christensen Gambit 1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. Nf3 211 | D20 Queen's Gambit Accepted: Old Variation, Korchnoi Gambit 1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. Kf1 212 | D20 Queen's Gambit Accepted: Old Variation, Novikov Gambit 1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. Nd2 213 | D20 Queen's Gambit Accepted: Saduleto Variation 1. d4 d5 2. c4 dxc4 3. e4 214 | D20 Queen's Gambit Accepted: Schwartz Defense 1. d4 d5 2. c4 dxc4 3. e4 f5 215 | D21 Queen's Gambit Accepted: Alekhine Defense, Borisenko-Furman Variation 1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e4 216 | D21 Queen's Gambit Accepted: Godes Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nd7 217 | D21 Queen's Gambit Accepted: Gunsberg Defense 1. d4 d5 2. c4 dxc4 3. Nf3 c5 218 | D21 Queen's Gambit Accepted: Normal Variation 1. d4 d5 2. c4 dxc4 3. Nf3 219 | D21 Queen's Gambit Accepted: Rosenthal Variation 1. d4 d5 2. c4 dxc4 3. Nf3 e6 220 | D21 Queen's Gambit Accepted: Slav Gambit 1. d4 d5 2. c4 dxc4 3. Nf3 b5 221 | D22 Queen's Gambit Accepted: Alekhine Defense 1. d4 d5 2. c4 dxc4 3. Nf3 a6 222 | D22 Queen's Gambit Accepted: Alekhine Defense, Alatortsev Variation 1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 Bg4 5. Bxc4 e6 6. d5 223 | D22 Queen's Gambit Accepted: Alekhine Defense, Haberditz Variation 1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 b5 224 | D23 Queen's Gambit Accepted 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 225 | D23 Queen's Gambit Accepted: Mannheim Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Qa4+ 226 | D24 Queen's Gambit Accepted 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4 227 | D24 Queen's Gambit Accepted: Bogoljubow Defense 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4 228 | D24 Queen's Gambit Accepted: Gunsberg Defense, Prianishenmo Gambit 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 c5 5. d5 e6 6. e4 exd5 7. e5 229 | D24 Queen's Gambit Accepted: Showalter Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 230 | D25 Queen's Gambit Accepted: Janowski-Larsen Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 231 | D25 Queen's Gambit Accepted: Normal Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 232 | D25 Queen's Gambit Accepted: Smyslov Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 g6 233 | D25 Queen's Gambit Accepted: Winawer Defense 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Be6 234 | D26 Queen's Gambit Accepted: Classical Defense 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 235 | D26 Queen's Gambit Accepted: Classical Defense, Normal Line 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O 236 | D26 Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Development Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O Nc6 237 | D26 Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Exchange Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O cxd4 238 | D26 Queen's Gambit Accepted: Classical, Furman Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. Qe2 a6 7. dxc5 Bxc5 8. O-O Nc6 9. e4 b5 10. e5 239 | D26 Queen's Gambit Accepted: Normal Variation, Traditional System 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 240 | D27 Queen's Gambit Accepted: Classical Defense, Main Line 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 241 | D27 Queen's Gambit Accepted: Classical Defense, Rubinstein Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. a4 242 | D27 Queen's Gambit Accepted: Classical Defense, Russian Gambit 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. e4 243 | D27 Queen's Gambit Accepted: Furman Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. dxc5 Bxc5 244 | D28 Queen's Gambit Accepted: Classical Defense, Alekhine System 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 245 | D28 Queen's Gambit Accepted: Classical Defense, Alekhine System 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 246 | D28 Queen's Gambit Accepted: Classical, Flohr Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Nc6 9. Rd1 c4 10. Bc2 Nb4 11. Nc3 Nxc2 12. Qxc2 Bb7 13. d5 Qc7 247 | D29 Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 248 | D29 Queen's Gambit Accepted: Classical Defense, Alekhine System, Smyslov Variation 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. Rd1 Nbd7 10. Nc3 Bd6 249 | D30 Queen's Gambit Declined 1. d4 d5 2. c4 e6 250 | D30 Queen's Gambit Declined: Capablanca Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 h6 251 | D30 Queen's Gambit Declined: Capablanca Variation 1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Bg5 c6 5. Nbd2 Nbd7 6. e3 252 | D30 Queen's Gambit Declined: Semmering Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Nbd7 6. Bd3 c5 253 | D30 Queen's Gambit Declined: Spielmann Variation 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 g6 254 | D30 Queen's Gambit Declined: Stonewall Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Ne4 6. Bd3 f5 255 | D30 Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch 1. d4 d5 2. c4 e6 3. Nf3 c5 256 | D30 Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch Bishop Attack 1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. Bg5 257 | D30 Queen's Gambit Declined: Traditional Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 258 | D30 Queen's Gambit Declined: Vienna Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 Bb4+ 259 | D30 Semi-Slav Defense: Quiet Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 260 | D30 Semi-Slav Defense: Quiet Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Nbd7 261 | D31 Queen's Gambit Declined: Alapin Variation 1. d4 e6 2. c4 b6 3. Nc3 d5 262 | D31 Queen's Gambit Declined: Charousek Variation 1. d4 d5 2. c4 e6 3. Nc3 Be7 263 | D31 Queen's Gambit Declined: Charousek Variation, Miladinovic Gambit 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. e4 dxe4 5. f3 264 | D31 Queen's Gambit Declined: Janowski Variation 1. d4 d5 2. c4 e6 3. Nc3 a6 265 | D31 Queen's Gambit Declined: Queen's Knight Variation 1. d4 d5 2. c4 e6 3. Nc3 266 | D31 Queen's Gambit Declined: Semi-Slav, Abrahams Variation 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5 267 | D31 Queen's Gambit Declined: Semi-Slav, Junge Variation 1. d4 d5 2. c4 e6 3. Nf3 c6 4. Nc3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 Qb6 268 | D31 Queen's Gambit Declined: Semi-Slav, Koomen Variation 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. e3 b5 6. a4 Bb4 7. Bd2 Qe7 269 | D31 Queen's Gambit Declined: Uhlmann Variation 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. Rc1 dxc4 270 | D31 Semi-Slav Defense: Accelerated Move Order 1. d4 d5 2. c4 e6 3. Nc3 c6 271 | D31 Semi-Slav Defense: Anti-Noteboom, Stonewall Variation, Portisch Gambit 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 f5 5. g4 272 | D31 Semi-Slav Defense: Gunderam Gambit 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. f3 273 | D31 Semi-Slav Defense: Marshall Gambit 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 274 | D31 Semi-Slav Defense: Marshall Gambit, Forgotten Variation 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Nc3 275 | D31 Semi-Slav Defense: Marshall Gambit, Main Line 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2 276 | D31 Semi-Slav Defense: Marshall Gambit, Tolush Variation 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2 Qxd4 7. Bxb4 Qxe4+ 8. Be2 c5 9. Bxc5 Qxg2 277 | D31 Semi-Slav Defense: Noteboom Variation 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 278 | D31 Semi-Slav Defense: Noteboom Variation, Abrahams Variation 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 Bxc3+ 7. bxc3 b5 8. axb5 cxb5 279 | D31 Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Gambit 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. g3 280 | D31 Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5 281 | D31 Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation, Belyavsky Line 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5 f6 282 | D32 Queen's Gambit Declined: Tarrasch Defense 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 283 | D32 Tarrasch Defense 1. d4 d5 2. c4 e6 3. Nc3 c5 284 | D32 Tarrasch Defense: Grünfeld Gambit 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. dxc5 d4 7. Na4 b5 285 | D32 Tarrasch Defense: Marshall Gambit 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. e4 286 | D32 Tarrasch Defense: Schara Gambit 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4 287 | D32 Tarrasch Defense: Symmetrical Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. e3 Nf6 5. Nf3 Nc6 288 | D32 Tarrasch Defense: Tarrasch Gambit 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. dxc5 d4 6. Na4 b5 289 | D32 Tarrasch Defense: Two Knights Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 290 | D32 Tarrasch Defense: von Hennig Gambit 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4 5. Qxd4 Nc6 6. Qd1 exd5 7. Qxd5 Be6 291 | D33 Tarrasch Defense: Dubov Tarrasch 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 cxd4 8. Nxd4 Bc5 292 | D33 Tarrasch Defense: Prague Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 293 | D33 Tarrasch Defense: Rubinstein System 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 294 | D33 Tarrasch Defense: Swedish Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4 295 | D33 Tarrasch Defense: Swedish Variation, Central Break 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4 7. e4 296 | D33 Tarrasch Defense: Wagner Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Bg4 297 | D34 Queen's Gambit Declined: Tarrasch Defense, Stoltz Variation 1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. g3 Nc6 6. Bg2 Nf6 7. O-O Be7 8. Nc3 O-O 9. Bg5 Be6 10. Rc1 b6 298 | D34 Tarrasch Defense: Classical Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 299 | D34 Tarrasch Defense: Classical Variation, Advance Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 c4 300 | D34 Tarrasch Defense: Classical Variation, Bogoljubow Variation 1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. Nf3 d5 5. cxd5 exd5 6. g3 Nc6 7. Bg2 Be7 8. O-O O-O 9. Bg5 Be6 10. Rc1 c4 301 | D34 Tarrasch Defense: Classical Variation, Carlsbad Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 302 | D34 Tarrasch Defense: Classical Variation, Chandler Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Re8 12. Rc1 Be6 303 | D34 Tarrasch Defense: Classical Variation, Classical Tarrasch Gambit 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. dxc5 d4 304 | D34 Tarrasch Defense: Classical Variation, Endgame Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 Be6 305 | D34 Tarrasch Defense: Classical Variation, Main Line 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Re8 306 | D34 Tarrasch Defense: Classical Variation, Petursson Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 Re8 307 | D34 Tarrasch Defense: Classical Variation, Réti Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. dxc5 Bxc5 10. Na4 308 | D34 Tarrasch Defense: Classical Variation, Spassky Variation 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Bg4 309 | D34 Tarrasch Defense: Prague Variation, Main Line 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 310 | D35 Queen's Gambit Declined: Exchange Variation 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 311 | D35 Queen's Gambit Declined: Exchange Variation, Chameleon Variation 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 Nbd7 8. Qc2 Re8 9. Nge2 Nf8 10. O-O-O 312 | D35 Queen's Gambit Declined: Exchange Variation, Positional Variation 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 313 | D35 Queen's Gambit Declined: Exchange Variation, Positional Variation 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 314 | D35 Queen's Gambit Declined: Exchange Variation, Sämisch Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. cxd5 exd5 6. Bf4 315 | D35 Queen's Gambit Declined: Harrwitz Attack 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bf4 316 | D35 Queen's Gambit Declined: Normal Defense 1. d4 d5 2. c4 e6 3. Nc3 Nf6 317 | D36 Queen's Gambit Declined: Exchange Variation, Reshevsky Variation 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. Qc2 318 | D37 Queen's Gambit Declined: Barmen Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 319 | D37 Queen's Gambit Declined: Harrwitz Attack 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 320 | D37 Queen's Gambit Declined: Harrwitz Attack 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. Rd1 Qa5 10. a3 321 | D37 Queen's Gambit Declined: Harrwitz Attack 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. a3 Qa5 10. O-O-O 322 | D37 Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bf4 O-O 6. e3 b6 323 | D37 Queen's Gambit Declined: Harrwitz Attack, Main Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 324 | D37 Queen's Gambit Declined: Harrwitz Attack, Orthodox Defense 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 O-O 6. e3 c6 325 | D37 Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 Nbd7 326 | D37 Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. c5 327 | D37 Queen's Gambit Declined: Knight Defense, Alekhine Gambit 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. Bg5 h6 6. Bh4 dxc4 328 | D37 Queen's Gambit Declined: Miles Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. Qc2 329 | D37 Queen's Gambit Declined: Three Knights Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 330 | D37 Queen's Gambit Declined: Three Knights, Vienna Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 331 | D37 Queen's Gambit Declined: Vienna Variation, Quiet Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 5. e3 332 | D38 Queen's Gambit Declined: Ragozin Defense 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 333 | D38 Queen's Gambit Declined: Ragozin Defense, Alekhine Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Qa4+ 334 | D38 Queen's Gambit Declined: Westphalian Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 Nbd7 6. e3 c5 335 | D39 Queen's Gambit Declined: Ragozin Defense, Vienna Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 dxc4 336 | D40 Queen's Gambit Declined: Semi-Tarrasch Defense 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 337 | D40 Queen's Gambit Declined: Semi-Tarrasch Defense, Levenfish Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O 8. Qe2 Qe7 9. dxc5 Bxc5 10. e4 338 | D40 Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. Bg5 339 | D40 Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O 340 | D41 Queen's Gambit Declined: Semi-Tarrasch Defense 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 e6 341 | D41 Queen's Gambit Declined: Semi-Tarrasch Defense 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 342 | D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4 343 | D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Kmoch Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bb5 344 | D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 345 | D41 Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Nf3 cxd4 8. cxd4 Bb4+ 9. Bd2 Qa5 346 | D42 Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 347 | D43 Queen's Gambit Declined: Hastings Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bxf6 Qxf6 7. Qb3 348 | D43 Semi-Slav Defense 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 349 | D43 Semi-Slav Defense: Anti-Moscow Gambit 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bh4 350 | D44 Semi-Slav Defense Accepted 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 351 | D44 Semi-Slav Defense: Botvinnik Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 352 | D44 Semi-Slav Defense: Botvinnik Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 353 | D44 Semi-Slav Defense: Botvinnik Variation, Alatortsev System 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 Nd5 354 | D44 Semi-Slav Defense: Botvinnik Variation, Ekstrom Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. exf6 gxh4 10. Ne5 355 | D44 Semi-Slav Defense: Botvinnik Variation, Lilienthal Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. g3 356 | D44 Semi-Slav Defense: Botvinnik Variation, Szabo Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. Qf3 357 | D45 Semi-Slav Defense: Accelerated Meran Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 a6 358 | D45 Semi-Slav Defense: Main Line 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 359 | D45 Semi-Slav Defense: Normal Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 360 | D45 Semi-Slav Defense: Rubinstein System 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. e3 Nbd7 6. Ne5 361 | D45 Semi-Slav Defense: Stoltz Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 362 | D45 Semi-Slav Defense: Stoltz Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 b6 7. b3 363 | D45 Semi-Slav Defense: Stoltz Variation 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 e6 5. Nc3 Nbd7 6. Qc2 Bd6 7. b3 364 | D45 Semi-Slav Defense: Stoltz Variation 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 e6 5. Nc3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Bb2 365 | D45 Semi-Slav Defense: Stoltz Variation, Center Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. e4 366 | D45 Semi-Slav Defense: Stoltz Variation, Center Variation, Mikhalchishin Line 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. e4 dxe4 8. Nxe4 Nxe4 9. Qxe4 e5 10. dxe5 367 | D45 Semi-Slav Defense: Stoltz Variation, Shabalov Attack 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. g4 368 | D45 Semi-Slav Defense: Stonewall Defense 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Ne4 6. Bd3 f5 369 | D46 Semi-Slav Defense: Bogoljubow Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Be7 370 | D46 Semi-Slav Defense: Chigorin Defense 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Bd6 371 | D46 Semi-Slav Defense: Chigorin Defense 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Bd6 7. Qc2 372 | D46 Semi-Slav Defense: Chigorin Defense 1. d4 d5 2. c4 c6 3. Nf3 e6 4. e3 Nf6 5. Nc3 Bd6 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Nbd7 9. O-O O-O 10. Qc2 373 | D46 Semi-Slav Defense: Chigorin Defense 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bd6 9. O-O Bb7 10. a3 O-O 11. Qc2 374 | D46 Semi-Slav Defense: Main Line 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 375 | D46 Semi-Slav Defense: Main Line 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 b6 7. b3 Bb7 8. Bd3 Be7 9. O-O O-O 10. Bb2 376 | D46 Semi-Slav Defense: Romih Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Bb4 377 | D47 Semi-Slav Defense: Meran Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 378 | D47 Semi-Slav Defense: Meran Variation, Lundin Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 379 | D47 Semi-Slav Defense: Meran Variation, Wade Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 380 | D47 Semi-Slav Defense: Meran Variation, Wade Variation, Kaidanov Gambit 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5 12. O-O cxd4 13. Nxd4 381 | D47 Semi-Slav Defense: Meran Variation, Wade Variation, Larsen Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5 382 | D47 Semi-Slav Defense: Semi-Meran Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 383 | D48 Semi-Slav Defense: Meran Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 384 | D48 Semi-Slav Defense: Meran Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 385 | D48 Semi-Slav Defense: Meran Variation, Old Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 386 | D48 Semi-Slav Defense: Meran Variation, Pirc Variation 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 b4 387 | D48 Semi-Slav Defense: Meran Variation, Reynolds' Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. d5 388 | D49 Semi-Slav Defense: Meran Variation, Blumenfeld Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 389 | D49 Semi-Slav Defense: Meran Variation, Rabinovich Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Ng4 390 | D49 Semi-Slav Defense: Meran Variation, Rellstab Attack 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. O-O Qd5 14. Qe2 Ba6 15. Bg5 391 | D49 Semi-Slav Defense: Meran Variation, Sozin Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 392 | D49 Semi-Slav Defense: Meran Variation, Sozin Variation 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. O-O 393 | D49 Semi-Slav Defense: Meran Variation, Stahlberg Variation 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. Qf3 394 | D50 Queen's Gambit Declined: Been-Koomen Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 395 | D50 Queen's Gambit Declined: Modern Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 396 | D50 Queen's Gambit Declined: Pseudo-Tarrasch Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 397 | D50 Queen's Gambit Declined: Pseudo-Tarrasch Variation, Canal Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 Qb6 398 | D50 Queen's Gambit Declined: Pseudo-Tarrasch Variation, Primitive Pillsbury Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Qxd4 399 | D50 Queen's Gambit Declined: Semi-Tarrasch Defense, Krause Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Nxd4 e5 7. Ndb5 a6 8. Qa4 400 | D51 Queen's Gambit Declined: Alekhine Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. e4 401 | D51 Queen's Gambit Declined: Capablanca Variation, Anti-Cambridge Springs Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. a3 402 | D51 Queen's Gambit Declined: Manhattan Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 Bb4 403 | D51 Queen's Gambit Declined: Modern Variation, Knight Defense 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 404 | D51 Queen's Gambit Declined: Modern Variation, Knight Defense 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 405 | D51 Queen's Gambit Declined: Modern Variation, Knight Defense 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 406 | D51 Queen's Gambit Declined: Rochlin Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. Rc1 Qa5 7. Bd2 407 | D52 Queen's Gambit Declined 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 408 | D52 Queen's Gambit Declined: Cambridge Springs Defense 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 409 | D52 Queen's Gambit Declined: Cambridge Springs Defense 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5 410 | D52 Queen's Gambit Declined: Cambridge Springs Defense, Argentine Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Nd2 Bb4 8. Qc2 O-O 9. Bh4 411 | D52 Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 Bb4 8. Qc2 412 | D52 Queen's Gambit Declined: Cambridge Springs Defense, Capablanca Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Bxf6 413 | D52 Queen's Gambit Declined: Cambridge Springs Defense, Rubinstein Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 dxc4 414 | D52 Queen's Gambit Declined: Cambridge Springs Defense, Yugoslav Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5 Nxd5 415 | D53 Queen's Gambit Declined 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 416 | D53 Queen's Gambit Declined: Lasker Defense 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 Ne4 417 | D53 Queen's Gambit Declined: Modern Variation, Heral Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 418 | D54 Queen's Gambit Declined: Neo-Orthodox Variation 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Rc1 419 | D55 Queen's Gambit Declined: Anti-Tartakower Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6 7. Bxf6 420 | D55 Queen's Gambit Declined: Anti-Tartakower Variation, Petrosian Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bxf6 Bxf6 7. e3 O-O 8. Rc1 c6 9. Bd3 Nd7 10. O-O dxc4 11. Bxc4 421 | D55 Queen's Gambit Declined: Modern Variation, Normal Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 422 | D55 Queen's Gambit Declined: Neo-Orthodox Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6 423 | D55 Queen's Gambit Declined: Neo-Orthodox Variation, Main Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 424 | D55 Queen's Gambit Declined: Pillsbury Attack 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 d5 5. cxd5 exd5 6. Bg5 Be7 7. e3 O-O 8. Bd3 Bb7 9. Ne5 425 | D56 Queen's Gambit Declined: Lasker Defense 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 426 | D56 Queen's Gambit Declined: Lasker Defense, Russian Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. Qc2 Nf6 10. Bd3 dxc4 11. Bxc4 c5 12. O-O Nc6 13. Rfd1 Bd7 427 | D56 Queen's Gambit Declined: Lasker Defense, Teichmann Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 8. Bxe7 Qxe7 9. Qc2 428 | D57 Queen's Gambit Declined: Lasker Defense, Bernstein Variation 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 h6 6. Bh4 O-O 7. Nf3 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 Qd6 429 | D57 Queen's Gambit Declined: Lasker Defense, Bernstein Variation, Mar del Plata Gambit 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 Rd8 12. c4 Be6 430 | D57 Queen's Gambit Declined: Lasker Defense, Main Line 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 431 | D58 Queen's Gambit Declined: Tartakower Defense 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 432 | D58 Queen's Gambit Declined: Tartakower Defense, Exchange Variation 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5 exd5 433 | D59 Queen's Gambit Declined: Tartakower Defense 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5 Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Rc1 Be6 434 | D59 Queen's Gambit Declined: Tartakower Defense, Makogonov Exchange Variation 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5 Nxd5 435 | D60 Queen's Gambit Declined: Orthodox Defense 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 436 | D60 Queen's Gambit Declined: Orthodox Defense, Botvinnik Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Bd3 437 | D60 Queen's Gambit Declined: Orthodox Defense, Rauzer Variation 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qb3 438 | D61 Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qc2 439 | D62 Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation, Flohr Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qc2 c5 8. cxd5 440 | D63 Queen's Gambit Declined: Orthodox Defense, Capablanca Variation 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bb5 441 | D63 Queen's Gambit Declined: Orthodox Defense, Henneberger Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 a6 442 | D63 Queen's Gambit Declined: Orthodox Defense, Main Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 443 | D63 Queen's Gambit Declined: Orthodox Defense, Main Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 444 | D63 Queen's Gambit Declined: Orthodox Defense, Pillsbury Variation 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bd3 445 | D63 Queen's Gambit Declined: Orthodox Defense, Swiss, Carlsbad Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 a6 8. cxd5 446 | D64 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. a3 a6 9. Qc2 447 | D64 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 448 | D64 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 a6 449 | D64 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 Ne4 450 | D65 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 a6 9. cxd5 451 | D66 Queen's Gambit Declined: Orthodox Defense, Bd3 Line 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 452 | D66 Queen's Gambit Declined: Orthodox Defense, Fianchetto Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c6 5. Nf3 Be7 6. e3 Nbd7 7. Rc1 O-O 8. Bd3 dxc4 9. Bxc4 b5 453 | D67 Queen's Gambit Declined: Orthodox Defense, Alekhine Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. Ne4 454 | D67 Queen's Gambit Declined: Orthodox Defense, Bd3 Line 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 455 | D67 Queen's Gambit Declined: Orthodox Defense, Capablanca System 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 456 | D67 Queen's Gambit Declined: Orthodox Defense, Janowski Variation 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. h4 457 | D67 Queen's Gambit Declined: Orthodox Defense, Main Line 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O 458 | D68 Queen's Gambit Declined: Orthodox Defense, Classical Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 459 | D68 Queen's Gambit Declined: Orthodox Defense, Classical Variation 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qb1 460 | D68 Queen's Gambit Declined: Orthodox Defense, Classical Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qc2 461 | D69 Queen's Gambit Declined: Orthodox Defense, Classical Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. dxe5 Nxe5 14. Nxe5 Qxe5 462 | D70 Neo-Grünfeld Defense: Goglidze Attack 1. d4 Nf6 2. c4 g6 3. f3 d5 463 | D70 Neo-Grünfeld Defense: with Nf3 1. d4 Nf6 2. c4 g6 3. Nf3 d5 464 | D70 Neo-Grünfeld Defense: with g3 1. d4 Nf6 2. c4 g6 3. g3 d5 465 | D71 Neo-Grünfeld Defense: Exchange Variation 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 466 | D74 Neo-Grünfeld Defense: Delayed Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d5 6. cxd5 Nxd5 7. O-O 467 | D75 Neo-Grünfeld Defense: Delayed Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. g3 d5 6. cxd5 Nxd5 7. Bg2 c5 8. O-O 468 | D75 Neo-Grünfeld Defense: Delayed Exchange Variation 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 d5 6. cxd5 Nxd5 7. O-O c5 8. dxc5 469 | D76 Neo-Grünfeld Defense: Delayed Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d5 6. cxd5 Nxd5 7. O-O Nb6 470 | D77 Neo-Grünfeld Defense: Classical Variation 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 471 | D77 Neo-Grünfeld Defense: Classical Variation, Modern Defense 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 dxc4 472 | D77 Neo-Grünfeld Defense: Classical Variation, Polgar Variation 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 Nc6 473 | D78 Neo-Grünfeld Defense: Classical Variation, Original Defense 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c6 6. O-O d5 474 | D79 Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c6 6. O-O d5 7. cxd5 cxd5 475 | D80 Grünfeld Defense 1. d4 Nf6 2. c4 g6 3. Nc3 d5 476 | D80 Grünfeld Defense: Gibbon Gambit 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. g4 477 | D80 Grünfeld Defense: Lundin Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 Ne4 5. Nxe4 dxe4 6. Qd2 c5 478 | D80 Grünfeld Defense: Lutikov Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. f3 479 | D80 Grünfeld Defense: Lutikov Variation, Murrey Attack 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. f3 c5 5. cxd5 Nxd5 6. Na4 480 | D80 Grünfeld Defense: Stockholm Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 481 | D80 Grünfeld Defense: Zaitsev Gambit 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. h4 482 | D81 Grünfeld Defense: Russian Variation, Accelerated Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3 483 | D82 Grünfeld Defense: Brinckmann Attack 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 484 | D83 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 485 | D83 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Botvinnik Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1 c5 7. dxc5 Be6 486 | D83 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Capablanca Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1 487 | D83 Grünfeld Defense: Brinckmann Attack, Reshevsky Gambit 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. Rc1 O-O 6. e3 c5 7. dxc5 Qa5 488 | D84 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit Accepted 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. cxd5 Nxd5 7. Nxd5 Qxd5 8. Bxc7 489 | D85 Grünfeld Defense: Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 490 | D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 491 | D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 492 | D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. Rb1 493 | D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Kramnik's Line 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. h3 494 | D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Pawn Grab Line 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Rb1 O-O 9. Be2 Nc6 10. d5 Bxc3+ 495 | D85 Grünfeld Defense: Exchange Variation, Nadanian Attack 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Na4 496 | D86 Grünfeld Defense: Exchange Variation, Classical Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 497 | D86 Grünfeld Defense: Exchange Variation, Larsen Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Qd7 498 | D86 Grünfeld Defense: Exchange Variation, Larsen Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Qd7 9. O-O b6 499 | D86 Grünfeld Defense: Exchange Variation, Simagin's Improved Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Nc6 500 | D86 Grünfeld Defense: Exchange Variation, Simagin's Lesser Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 b6 501 | D87 Grünfeld Defense: Exchange Variation, Seville Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bg4 11. f3 Na5 12. Bxf7+ 502 | D87 Grünfeld Defense: Exchange Variation, Spassky Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 503 | D88 Grünfeld Defense: Exchange Variation, Spassky Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O cxd4 11. cxd4 504 | D89 Grünfeld Defense: Exchange Variation, Sokolsky Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 Bg4 11. f3 Na5 12. Bd3 cxd4 13. cxd4 Be6 14. d5 505 | D89 Grünfeld Defense: Exchange Variation, Spassky Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bg4 11. f3 Na5 12. Bd3 cxd4 13. cxd4 Be6 506 | D90 Grünfeld Defense: Flohr Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qa4+ 507 | D90 Grünfeld Defense: Three Knights Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 508 | D90 Grünfeld Defense: Three Knights Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 509 | D91 Grünfeld Defense: Three Knights Variation, Petrosian System 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 510 | D92 Grünfeld Defense: Three Knights Variation, Hungarian Attack 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 511 | D93 Grünfeld Defense: Three Knights Variation, Hungarian Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 O-O 6. e3 512 | D94 Grünfeld Defense: Flohr Defense 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 g6 5. Nf3 Bg7 6. Bd3 O-O 7. O-O Bf5 513 | D94 Grünfeld Defense: Makogonov Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. b4 514 | D94 Grünfeld Defense: Opocensky Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd2 515 | D94 Grünfeld Defense: Smyslov Defense 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 g6 5. Nf3 Bg7 6. Bd3 O-O 7. O-O Bg4 516 | D94 Grünfeld Defense: Three Knights Variation, Burille Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 517 | D94 Grünfeld Defense: Three Knights Variation, Paris Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd3 518 | D95 Grünfeld Defense: Botvinnik Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3 e6 519 | D95 Grünfeld Defense: Pachman Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. e3 Bg7 5. Qb3 dxc4 6. Bxc4 O-O 7. Nf3 Nbd7 8. Ng5 520 | D95 Grünfeld Defense: Three Knights Variation, Vienna Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3 521 | D96 Grünfeld Defense: Russian Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 522 | D97 Grünfeld Defense: Russian Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 523 | D97 Grünfeld Defense: Russian Variation, Byrne Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Nc6 524 | D97 Grünfeld Defense: Russian Variation, Hungarian Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 a6 525 | D97 Grünfeld Defense: Russian Variation, Levenfish Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 b6 526 | D97 Grünfeld Defense: Russian Variation, Prins Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Na6 527 | D97 Grünfeld Defense: Russian Variation, Szabo Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 c6 528 | D98 Grünfeld Defense: Russian Variation, Keres Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Be2 Nb6 10. Qd3 Nc6 11. O-O-O 529 | D98 Grünfeld Defense: Russian Variation, Smyslov Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 530 | D99 Grünfeld Defense: Russian Variation, Smyslov Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3 531 | D99 Grünfeld Defense: Russian Variation, Yugoslav Variation 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3 c5 532 | -------------------------------------------------------------------------------- /e.tsv: -------------------------------------------------------------------------------- 1 | eco name pgn 2 | E00 Catalan Opening 1. d4 Nf6 2. c4 e6 3. g3 3 | E00 Catalan Opening 1. d4 Nf6 2. c4 e6 3. g3 d5 4 | E00 Catalan Opening: Hungarian Gambit 1. d4 Nf6 2. c4 e6 3. g3 e5 5 | E00 Indian Defense 1. d4 Nf6 2. c4 e6 3. Qb3 6 | E00 Indian Defense: Devin Gambit 1. d4 Nf6 2. c4 e6 3. g4 7 | E00 Indian Defense: Seirawan Attack 1. d4 Nf6 2. c4 e6 3. Bg5 8 | E01 Catalan Opening: Closed 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 9 | E02 Catalan Opening: Open Defense 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 10 | E03 Catalan Opening: Open Defense 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 11 | E03 Catalan Opening: Open Defense, Alekhine Variation 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 a6 7. Qc2 12 | E04 Catalan Opening: Open Defense 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 13 | E04 Catalan Opening: Open Defense 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 c6 5. Bg2 dxc4 14 | E04 Catalan Opening: Open Defense, Modern Sharp Variation 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Nc6 6. Qa4 Bb4+ 15 | E05 Catalan Opening: Open Defense, Classical Line 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7 16 | E05 Catalan Opening: Open Defense, Classical Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 17 | E06 Catalan Opening: Closed 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 18 | E06 Catalan Opening: Closed 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Bf4 b6 19 | E06 Catalan Opening: Closed 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O c6 7. Qc2 b6 8. Nbd2 Bb7 9. e4 Na6 20 | E07 Catalan Opening: Closed 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 21 | E07 Catalan Opening: Closed, Botvinnik Variation 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Nc3 c6 8. Qd3 22 | E08 Catalan Opening: Closed 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 23 | E08 Catalan Opening: Closed 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3 24 | E08 Catalan Opening: Closed 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3 b6 25 | E08 Catalan Opening: Closed 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O c6 7. Qc2 b6 8. Rd1 Nbd7 9. Bf4 26 | E08 Catalan Opening: Closed 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Bf4 b6 9. Nbd2 Bb7 10. e4 27 | E08 Catalan Opening: Closed, Spassky Gambit 1. d4 Nf6 2. c4 e6 3. g3 Be7 4. Bg2 d5 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3 b6 9. Rd1 Bb7 10. Nc3 b5 28 | E08 Catalan Opening: Closed, Zagoryansky Variation 1. d4 e6 2. c4 Nf6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Rd1 b6 9. a4 29 | E09 Catalan Opening: Closed Variation, Rabinovich Variation 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 e6 5. Nbd2 Be7 6. g3 Nbd7 7. Bg2 O-O 8. O-O b5 30 | E09 Catalan Opening: Closed Variation, Traditional Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 b6 31 | E09 Catalan Opening: Closed, Main Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 32 | E09 Catalan Opening: Closed, Main Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O c6 7. Qc2 b6 8. Nbd2 Bb7 9. e4 Nbd7 33 | E09 Catalan Opening: Closed, Main Line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Bf4 b6 9. Nbd2 Bb7 10. e4 dxe4 11. Nxe4 Nxe4 12. Qxe4 34 | E09 Catalan Opening: Closed, Sokolsky Variation 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 b6 9. b3 a5 10. Bb2 Ba6 35 | E10 Blumenfeld Countergambit 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 36 | E10 Blumenfeld Countergambit Accepted 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. dxe6 fxe6 6. cxb5 d5 37 | E10 Blumenfeld Countergambit: Duz-Khotimirsky Variation 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5 38 | E10 Blumenfeld Countergambit: Spielmann Variation 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5 exd5 6. cxd5 h6 39 | E10 Indian Defense: Anti-Nimzo-Indian 1. d4 Nf6 2. c4 e6 3. Nf3 40 | E10 Indian Defense: Dzindzi-Indian Defense 1. d4 Nf6 2. c4 e6 3. Nf3 a6 41 | E10 Indian Defense: Döry Indian 1. d4 Nf6 2. c4 e6 3. Nf3 Ne4 42 | E11 Bogo-Indian Defense 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 43 | E11 Bogo-Indian Defense: Exchange Variation 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Bxd2+ 44 | E11 Bogo-Indian Defense: Grünfeld Variation 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 45 | E11 Bogo-Indian Defense: Haiti Variation 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Nc6 46 | E11 Bogo-Indian Defense: Monticelli Trap 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 O-O 8. Nc3 Ne4 9. Qc2 Nxc3 10. Ng5 47 | E11 Bogo-Indian Defense: New England Variation 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nfd2 48 | E11 Bogo-Indian Defense: Nimzowitsch Variation 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7 49 | E11 Bogo-Indian Defense: Retreat Variation 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Be7 50 | E11 Bogo-Indian Defense: Retreat Variation 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 51 | E11 Bogo-Indian Defense: Retreat Variation 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 O-O 52 | E11 Bogo-Indian Defense: Retreat Variation 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 O-O 7. O-O 53 | E11 Bogo-Indian Defense: Retreat Variation 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 O-O 7. Qc2 c6 8. O-O 54 | E11 Bogo-Indian Defense: Retreat Variation 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 Nbd7 7. O-O O-O 8. Qc2 c6 55 | E11 Bogo-Indian Defense: Retreat Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Nbd7 9. Bf4 b6 10. Nbd2 56 | E11 Bogo-Indian Defense: Retreat Variation 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Nbd7 9. Bf4 b6 10. Nbd2 Ba6 57 | E11 Bogo-Indian Defense: Vitolins Variation 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 c5 58 | E11 Bogo-Indian Defense: Wade-Smyslov Variation 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 59 | E12 Queen's Indian Defense 1. d4 Nf6 2. c4 e6 3. Nf3 b6 60 | E12 Queen's Indian Defense: Kasparov Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 61 | E12 Queen's Indian Defense: Kasparov Variation, Botvinnik Attack 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 h6 6. Bh4 g5 7. Bg3 Nh5 62 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 63 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Andersson Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 Ne4 64 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Classical Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 exd5 65 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 g6 66 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Kasparov Attack 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qc2 67 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 68 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Marco Defense 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 Be7 69 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Modern Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 70 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. e3 71 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Polovodin Gambit 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. a3 d5 6. cxd5 Nxd5 7. e4 72 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Rashkovsky Attack 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qa4+ 73 | E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Romanishin Attack 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Bd2 74 | E12 Queen's Indian Defense: Miles Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Bf4 75 | E12 Queen's Indian Defense: Petrosian Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 76 | E12 Queen's Indian Defense: Petrosian Variation, Farago Defense 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Ba6 5. Qc2 Bb7 77 | E13 Queen's Indian Defense: Kasparov Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb4 5. Bg5 h6 6. Bh4 Bb7 78 | E14 Queen's Indian Defense: Averbakh Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 c5 6. O-O Be7 7. b3 O-O 8. Bb2 cxd4 9. Nxd4 79 | E14 Queen's Indian Defense: Spassky System 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 80 | E15 Queen's Indian Defense: Buerger Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. d5 exd5 7. Ng5 81 | E15 Queen's Indian Defense: Fianchetto Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 82 | E15 Queen's Indian Defense: Fianchetto Variation, Check Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 83 | E15 Queen's Indian Defense: Fianchetto Variation, Check Variation, Intermezzo Line 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7 84 | E15 Queen's Indian Defense: Fianchetto Variation, Check Variation, Modern Line 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Qe7 85 | E15 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 86 | E15 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Nimzowitsch Attack 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qa4 87 | E15 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Quiet Line 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 88 | E15 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Timman's Line 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qb3 89 | E15 Queen's Indian Defense: Fianchetto Variation, Rubinstein Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. d5 exd5 7. Nh4 90 | E15 Queen's Indian Defense: Fianchetto Variation, Sämisch Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 91 | E15 Queen's Indian Defense: Fianchetto Variation, Traditional Line 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 92 | E16 Queen's Indian Defense: Capablanca Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 93 | E16 Queen's Indian Defense: Riumin Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7 94 | E16 Queen's Indian Defense: Yates Variation 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. g3 b6 6. Bg2 Bb7 95 | E17 Queen's Indian Defense: Anti-Queen's Indian System 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 96 | E17 Queen's Indian Defense: Classical Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O 97 | E17 Queen's Indian Defense: Classical Variation, Polugaevsky Gambit 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8. Nh4 98 | E17 Queen's Indian Defense: Classical Variation, Taimanov Gambit 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8. Nd4 99 | E17 Queen's Indian Defense: Euwe Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. b3 100 | E17 Queen's Indian Defense: Fianchetto Variation, Kramnik Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Re1 101 | E17 Queen's Indian Defense: Opocensky Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 Ne4 7. Bd2 102 | E17 Queen's Indian Defense: Traditional Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 103 | E18 Queen's Indian Defense: Classical Variation, Tiviakov Defense 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Na6 104 | E18 Queen's Indian Defense: Classical Variation, Traditional Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 105 | E18 Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 d5 106 | E19 Queen's Indian Defense: Classical Variation, Traditional Variation, Main Line 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2 Nxc3 9. Qxc3 107 | E20 Nimzo-Indian Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 108 | E20 Nimzo-Indian Defense: Dilworth Gambit 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e4 109 | E20 Nimzo-Indian Defense: Kmoch Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 110 | E20 Nimzo-Indian Defense: Mikenas Attack 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qd3 111 | E20 Nimzo-Indian Defense: Romanishin Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 112 | E20 Nimzo-Indian Defense: Romanishin Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 O-O 6. Bg2 113 | E20 Nimzo-Indian Defense: Romanishin Variation, English Hybrid 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. cxd5 Nxd5 114 | E21 Nimzo-Indian Defense: Three Knights Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 115 | E21 Nimzo-Indian Defense: Three Knights Variation, Euwe Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5 Ne4 116 | E21 Nimzo-Indian Defense: Three Knights Variation, Korchnoi Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5 117 | E21 Nimzo-Indian Defense: Three Knights Variation, Shocron Gambit 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nc3 c5 5. d5 b5 118 | E22 Nimzo-Indian Defense: Spielmann Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 119 | E23 Nimzo-Indian Defense: Spielmann Variation, Carlsbad Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxd2 120 | E23 Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 121 | E23 Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5 122 | E23 Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5 8. Qc2 f5 9. g3 123 | E24 Nimzo-Indian Defense: Sämisch Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 124 | E24 Nimzo-Indian Defense: Sämisch Variation, Botvinnik Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. e3 O-O 8. cxd5 Nxd5 125 | E25 Nimzo-Indian Defense: Sämisch Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 126 | E25 Nimzo-Indian Defense: Sämisch Variation, Keres Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 Nxd5 8. dxc5 127 | E25 Nimzo-Indian Defense: Sämisch Variation, Romanovsky Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 Nxd5 8. dxc5 f5 128 | E26 Nimzo-Indian Defense: Sämisch Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 129 | E26 Nimzo-Indian Defense: Sämisch Variation, O'Kelly Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 b6 130 | E27 Nimzo-Indian Defense: Sämisch Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 131 | E28 Nimzo-Indian Defense: Sämisch Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. a3 Bxc3+ 6. bxc3 132 | E29 Nimzo-Indian Defense: Sämisch Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. a3 Bxc3+ 7. bxc3 O-O 133 | E29 Nimzo-Indian Defense: Sämisch Variation, Capablanca Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. a3 Bxc3+ 7. bxc3 O-O 8. Ne2 b6 9. e4 Ne8 134 | E30 Nimzo-Indian Defense: Leningrad Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 135 | E30 Nimzo-Indian Defense: Leningrad Variation, Averbakh Gambit 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 b5 136 | E31 Nimzo-Indian Defense: Leningrad Variation, Benoni Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 d6 137 | E32 Nimzo-Indian Defense: Classical Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 138 | E32 Nimzo-Indian Defense: Classical Variation, Keres Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 139 | E32 Nimzo-Indian Defense: Classical Variation, Vitolins-Adorjan Gambit 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b5 140 | E33 Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3 d6 141 | E33 Nimzo-Indian Defense: Classical Variation, Zurich Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 142 | E34 Nimzo-Indian Defense: Classical Variation, Belyavsky Gambit 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 Qf5 7. Qd1 e5 143 | E34 Nimzo-Indian Defense: Classical Variation, Noa Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 144 | E35 Nimzo-Indian Defense: Classical Variation, Noa Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5 145 | E36 Nimzo-Indian Defense: Classical Variation, Noa Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 146 | E36 Nimzo-Indian Defense: Classical Variation, Noa Variation, Botvinnik Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Nc6 147 | E36 Nimzo-Indian Defense: Classical Variation, Noa Variation, Main Line 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 148 | E36 Nimzo-Indian Defense: Classical Variation, Romanishin Gambit 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 c5 149 | E37 Nimzo-Indian Defense: Classical Variation, Modern Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 c5 150 | E37 Nimzo-Indian Defense: Classical Variation, Noa Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 151 | E37 Nimzo-Indian Defense: Classical Variation, Noa Variation, San Remo Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 Nc6 8. e3 e5 152 | E38 Nimzo-Indian Defense: Classical Variation, Berlin Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 153 | E38 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Steiner Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Bxc3+ 154 | E39 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. a3 Bxc5 7. Nf3 b6 155 | E39 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 156 | E40 Nimzo-Indian Defense: Rubinstein System 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 157 | E40 Nimzo-Indian Defense: Rubinstein System, Taimanov Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6 158 | E41 Nimzo-Indian Defense: Rubinstein System 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 159 | E41 Nimzo-Indian Defense: Rubinstein System, Hübner Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 160 | E41 Nimzo-Indian Defense: Rubinstein System, Hübner Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. O-O O-O 161 | E42 Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 162 | E42 Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Main Line 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 cxd4 6. exd4 O-O 7. a3 163 | E42 Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Sherbakov Attack 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 cxd4 6. exd4 O-O 7. c5 164 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 165 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 166 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 167 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O 168 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O c5 169 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O c5 8. Na4 cxd4 9. a3 Be7 170 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Ne4 5. Qc2 f5 6. Nf3 b6 7. Bd3 Bb7 171 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 b6 7. O-O Bb7 8. Na4 Qe7 172 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 Bxc3+ 5. bxc3 b6 6. e3 Bb7 7. Bd3 O-O 8. O-O 173 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. e3 Ne4 6. Qc2 174 | E43 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. e3 Ne4 6. Qc2 Bb7 7. Bd3 Bxc3+ 8. bxc3 f5 9. O-O 175 | E43 Nimzo-Indian Defense: St. Petersburg Variation, with Ne4 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 Ne4 176 | E44 Nimzo-Indian Defense: St. Petersburg Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 177 | E44 Nimzo-Indian Defense: St. Petersburg Variation, American Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Ne4 178 | E44 Nimzo-Indian Defense: St. Petersburg Variation, Romanishin–Psakhis Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 c5 6. a3 Ba5 179 | E45 Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Ba6 180 | E46 Nimzo-Indian Defense: Normal Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 181 | E46 Nimzo-Indian Defense: Reshevsky Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 182 | E46 Nimzo-Indian Defense: Simagin Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 d5 6. a3 Bd6 183 | E47 Nimzo-Indian Defense: Normal Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 184 | E48 Nimzo-Indian Defense: Normal Variation, Classical Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 185 | E48 Nimzo-Indian Defense: Ragozin Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 Nc6 7. O-O 186 | E49 Nimzo-Indian Defense: Normal Variation, Botvinnik System 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 187 | E50 Nimzo-Indian Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 188 | E51 Nimzo-Indian Defense: Normal Variation, Ragozin Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 189 | E51 Nimzo-Indian Defense: Normal Variation, Sämisch Deferred 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. a3 190 | E51 Nimzo-Indian Defense: Ragozin Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 Nc6 7. O-O dxc4 191 | E52 Nimzo-Indian Defense: Normal Variation, Schlechter Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 b6 192 | E52 Nimzo-Indian Defense: Normal Variation, Schlechter Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O d5 193 | E53 Nimzo-Indian Defense: Normal Variation, Gligoric System 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 194 | E53 Nimzo-Indian Defense: Normal Variation, Gligoric System 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nbd7 195 | E53 Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O b6 196 | E54 Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 197 | E54 Nimzo-Indian Defense: Normal Variation, Gligoric System, Smyslov Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 198 | E55 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 199 | E56 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 200 | E58 Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange Line 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 201 | E59 Nimzo-Indian Defense: Normal Variation, Bernstein Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4 202 | E60 Grünfeld Defense: Counterthrust Variation 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 203 | E60 Indian Defense: Anti-Grünfeld, Adorjan Gambit 1. d4 Nf6 2. c4 g6 3. d5 b5 204 | E60 Indian Defense: Anti-Grünfeld, Advance Variation 1. d4 Nf6 2. c4 g6 3. d5 205 | E60 Indian Defense: Anti-Grünfeld, Alekhine Variation 1. d4 Nf6 2. c4 g6 3. f3 206 | E60 Indian Defense: Anti-Grünfeld, Alekhine Variation, Leko Gambit 1. d4 Nf6 2. c4 g6 3. f3 e5 207 | E60 Indian Defense: Anti-Grünfeld, Basman-Williams Attack 1. d4 Nf6 2. c4 g6 3. h4 208 | E60 Indian Defense: King's Indian Variation, Fianchetto Variation 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 209 | E60 Indian Defense: West Indian Defense 1. d4 Nf6 2. c4 g6 210 | E60 King's Indian Defense: Fianchetto Variation, Immediate Fianchetto 1. d4 Nf6 2. c4 g6 3. g3 211 | E60 King's Indian Defense: Normal Variation, King's Knight Variation 1. d4 Nf6 2. Nf3 g6 3. c4 212 | E60 King's Indian Defense: Santasiere Variation 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. b4 213 | E60 King's Indian Defense: Semi-Classical Variation, Benoni Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2 c6 214 | E60 King's Indian Defense: Semi-Classical Variation, Hollywood Variation 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. e3 d6 6. Be2 Nc6 215 | E60 Queen's Pawn, Mengarini Attack 1. d4 Nf6 2. c4 g6 3. Qc2 216 | E61 King's Indian Defense 1. d4 Nf6 2. c4 g6 3. Nc3 217 | E61 King's Indian Defense: Fianchetto Variation, Benjamin Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c6 7. O-O Qb6 218 | E61 King's Indian Defense: Semi-Classical Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2 219 | E61 King's Indian Defense: Semi-Classical Variation, Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2 Nbd7 7. O-O e5 8. dxe5 dxe5 220 | E61 King's Indian Defense: Semi-Classical Variation, Queenside Storm Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2 Nbd7 7. O-O e5 8. b4 221 | E61 King's Indian Defense: Smyslov Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. Bg5 222 | E62 King's Indian Defense: Fianchetto Variation, Carlsbad Variation 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 223 | E62 King's Indian Defense: Fianchetto Variation, Delayed Fianchetto 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 224 | E62 King's Indian Defense: Fianchetto Variation, Kavalek Defense 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c6 7. Nc3 Qa5 225 | E62 King's Indian Defense: Fianchetto Variation, Larsen Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c6 7. O-O Bf5 226 | E62 King's Indian Defense: Fianchetto Variation, Lesser Simagin (Spassky) 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O Bf5 227 | E62 King's Indian Defense: Fianchetto Variation, Simagin Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O Bg4 228 | E62 King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 e5 229 | E63 King's Indian Defense: Fianchetto Variation, Panno Variation 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 230 | E63 King's Indian Defense: Fianchetto Variation, Panno Variation, Blockade Line 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. d5 Na5 9. Nd2 c5 10. Qc2 e5 231 | E63 King's Indian Defense: Fianchetto Variation, Panno Variation, Donner Line 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. d5 Na5 9. Nd2 c5 10. Qc2 Rb8 11. b3 b5 12. Bb2 bxc4 13. bxc4 Bh6 232 | E63 King's Indian Defense: Fianchetto Variation, Panno Variation, Korchnoi Line 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. h3 Rb8 9. Be3 b5 10. Nd2 233 | E64 King's Indian Defense: Fianchetto Variation, Double Fianchetto Attack 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 O-O 6. O-O Nbd7 7. Nc3 e5 8. b3 234 | E64 King's Indian Defense: Fianchetto Variation, Hungarian Variation 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 O-O 6. O-O Nbd7 7. Nc3 a6 235 | E64 King's Indian Defense: Fianchetto Variation, Pterodactyl Variation 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 c5 5. Bg2 Qa5+ 236 | E64 King's Indian Defense: Fianchetto Variation, Yugoslav System 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 O-O 6. O-O c5 237 | E64 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare Line 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5 238 | E65 King's Indian Defense: Fianchetto Variation, Yugoslav Variation 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 239 | E65 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. dxc5 dxc5 240 | E66 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. d5 241 | E67 King's Indian Defense: Fianchetto Variation, Classical Fianchetto 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 242 | E67 King's Indian Defense: Fianchetto Variation, Debrecen Defense 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 243 | E68 King's Indian Defense: Fianchetto Variation, Classical Variation 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. e4 244 | E68 King's Indian Defense: Fianchetto Variation, Long Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7 7. O-O e5 8. e4 Re8 9. h3 exd4 10. Nxd4 Nc5 11. Re1 a5 245 | E69 King's Indian Defense: Fianchetto Variation, Classical Main Line 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. e4 c6 9. h3 246 | E70 King's Indian Defense: Accelerated Averbakh Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 247 | E70 King's Indian Defense: Kramer Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 248 | E70 King's Indian Defense: Normal Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 249 | E70 King's Indian Defense: Normal Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 250 | E71 King's Indian Defense: Makogonov Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 251 | E72 King's Indian Defense: Normal Variation, Deferred Fianchetto 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3 252 | E72 King's Indian Defense: Pomar System 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3 O-O 6. Bg2 e5 7. Nge2 253 | E73 King's Indian Defense: Averbakh Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 254 | E73 King's Indian Defense: Averbakh Variation, Flexible Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 h6 255 | E73 King's Indian Defense: Averbakh Variation, Geller Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Nbd7 256 | E73 King's Indian Defense: Averbakh Variation, Modern Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Na6 257 | E73 King's Indian Defense: Averbakh Variation, Modern Defense, Burgess Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Na6 7. Qd2 c6 258 | E73 King's Indian Defense: Averbakh Variation, Nc6 Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Nc6 259 | E73 King's Indian Defense: Averbakh Variation, Spanish Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 a6 260 | E73 King's Indian Defense: Normal Variation, Standard Development 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 261 | E73 King's Indian Defense: Semi-Averbakh System 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Be3 262 | E74 King's Indian Defense: Averbakh Variation, Benoni Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 263 | E74 King's Indian Defense: Averbakh Variation, Benoni Defense, Advance Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 264 | E74 King's Indian Defense: Averbakh Variation, Benoni Defense, Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. dxc5 265 | E75 King's Indian Defense: Averbakh Variation, Main Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6 266 | E76 King's Indian Defense: Four Pawns Attack 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 267 | E76 King's Indian Defense: Four Pawns Attack, Dynamic Attack 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 268 | E76 King's Indian Defense: Four Pawns Attack, Modern Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 Na6 269 | E77 King's Indian Defense: Four Pawns Attack 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. f4 270 | E77 King's Indian Defense: Four Pawns Attack, Florentine Gambit 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. e5 271 | E77 King's Indian Defense: Four Pawns Attack, Normal Attack 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 e6 8. Be2 272 | E77 King's Indian Defense: Six Pawns Attack 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. d5 e6 8. dxe6 fxe6 9. g4 Nc6 10. h4 273 | E78 King's Indian Defense: Four Pawns Attack, Fluid Attack 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. Be2 274 | E79 King's Indian Defense: Four Pawns Attack, Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. Be2 cxd4 8. Nxd4 Nc6 9. Be3 275 | E80 King's Indian Defense: Sämisch Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 276 | E81 King's Indian Defense: Steiner Attack 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Bg5 277 | E81 King's Indian Defense: Sämisch Variation, Bobotsov-Korchnoi-Petrosian Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Nge2 278 | E81 King's Indian Defense: Sämisch Variation, Byrne Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c6 7. Bd3 a6 279 | E81 King's Indian Defense: Sämisch Variation, Normal Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 280 | E81 King's Indian Defense: Sämisch Variation, Sämisch Gambit 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c5 281 | E82 King's Indian Defense: Sämisch Variation, Double Fianchetto 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 b6 282 | E83 King's Indian Defense: Sämisch Variation, Panno Formation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6 283 | E83 King's Indian Defense: Sämisch Variation, Ruban Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 Rb8 284 | E83 King's Indian Defense: Sämisch Variation, Yates Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 285 | E84 King's Indian Defense: Sämisch Variation, Panno Main Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6 8. Qd2 Rb8 286 | E85 King's Indian Defense: Sämisch Variation, Orthodox Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 287 | E86 King's Indian Defense: Sämisch Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6 288 | E87 King's Indian Defense: Sämisch Variation, Bronstein Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 Nh5 8. Qd2 Qh4+ 9. g3 Nxg3 10. Qf2 Nxf1 11. Qxh4 Nxe3 12. Ke2 289 | E87 King's Indian Defense: Sämisch Variation, Closed Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 290 | E87 King's Indian Defense: Sämisch Variation, Orthodox Variation, Bronstein Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 Nh5 8. Qd2 Qh4+ 9. g3 Nxg3 10. Qf2 Nxf1 11. Qxh4 Nxe3 12. Ke2 Nxc4 291 | E89 King's Indian Defense: Sämisch Variation, Closed Variation, Main Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6 8. d5 cxd5 292 | E90 King's Indian Defense: Larsen Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be3 293 | E90 King's Indian Defense: Normal Variation, Rare Defenses 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 294 | E90 King's Indian Defense: Zinnowitz Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Bg5 295 | E91 King's Indian Defense: Kazakh Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Na6 296 | E91 King's Indian Defense: Orthodox Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 297 | E92 King's Indian Defense: Exchange Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. dxe5 298 | E92 King's Indian Defense: Orthodox Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 299 | E92 King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. Be3 300 | E92 King's Indian Defense: Petrosian Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 301 | E92 King's Indian Defense: Petrosian Variation, Stein Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 a5 302 | E93 King's Indian Defense: Petrosian Variation, Keres Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7 8. Bg5 h6 9. Bh4 g5 10. Bg3 Nh5 11. h4 303 | E93 King's Indian Defense: Petrosian Variation, Normal Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7 304 | E94 King's Indian Defense: Orthodox Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O 305 | E94 King's Indian Defense: Orthodox Variation, Donner Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O c6 306 | E94 King's Indian Defense: Orthodox Variation, Glek Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Na6 307 | E94 King's Indian Defense: Orthodox Variation, Positional Defense 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3 g6 6. Be2 Bg7 7. O-O O-O 308 | E94 King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Nbd7 7. O-O e5 8. d5 309 | E94 King's Indian Defense: Orthodox Variation, Ukrainian Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O a5 310 | E95 King's Indian Defense: Orthodox Variation 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1 311 | E96 King's Indian Defense: Orthodox Variation, Positional Defense, Main Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1 c6 9. Bf1 a5 312 | E97 King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 313 | E97 King's Indian Defense: Orthodox Variation, Bayonet Attack 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 314 | E97 King's Indian Defense: Orthodox Variation, Bayonet Attack, Sokolov's Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 Nh5 10. Re1 315 | E97 King's Indian Defense: Orthodox Variation, Bayonet Attack, Yepishin's Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 Nh5 10. Qc2 316 | E97 King's Indian Defense: Orthodox Variation, Korchnoi Attack 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Bd2 317 | E97 King's Indian Defense: Orthodox Variation, Modern System 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Nd2 318 | E98 King's Indian Defense: Orthodox Variation, Classical System 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 319 | E98 King's Indian Defense: Orthodox Variation, Classical System, Kozul Gambit 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3 f5 11. f3 f4 12. Bf2 g5 13. Rc1 Ng6 14. c5 320 | E98 King's Indian Defense: Orthodox Variation, Classical System, Neo-Classical Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3 321 | E99 King's Indian Defense: Orthodox Variation, Classical System, Benko Attack 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3 f5 11. g4 322 | E99 King's Indian Defense: Orthodox Variation, Classical System, Traditional Line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3 f5 323 | --------------------------------------------------------------------------------