'),k=0;8>k;k++){var g=c[k]+d,e=e+('
';C="white"===C?"black":"white";"white"===a?d--:d++}return e}function Y(a){if("function"===typeof b.pieceTheme)return b.pieceTheme(a);if("string"===typeof b.pieceTheme)return b.pieceTheme.replace(/{piece}/g,a);r(8272,"Unable to build image source for cfg.pieceTheme.");return""}function D(a,b,c){var d='');if(!0===b.showNotation){if("white"===a&&1===d||"black"===a&&8===d)e+='
";C="white"===C?"black":"white"}e+=''+c[k]+"
";0===k&&(e+=''+d+"
")}e+="';
545 |
546 | if (cfg.sparePieces === true) {
547 | html += '';
549 | }
550 |
551 | html += '';
552 |
553 | if (cfg.sparePieces === true) {
554 | html += '';
556 | }
557 |
558 | html += '
';
559 |
560 | return html;
561 | }
562 |
563 | /*
564 | var buildSquare = function(color, size, id) {
565 | var html = '';
568 |
569 | if (cfg.showNotation === true) {
570 |
571 | }
572 |
573 | html += '
';
574 |
575 | return html;
576 | };
577 | */
578 |
579 | function buildBoard(orientation) {
580 | if (orientation !== 'black') {
581 | orientation = 'white';
582 | }
583 |
584 | var html = '';
585 |
586 | // algebraic notation / orientation
587 | var alpha = deepCopy(COLUMNS);
588 | var row = 8;
589 | if (orientation === 'black') {
590 | alpha.reverse();
591 | row = 1;
592 | }
593 |
594 | var squareColor = 'white';
595 | for (var i = 0; i < 8; i++) {
596 | html += '';
597 | for (var j = 0; j < 8; j++) {
598 | var square = alpha[j] + row;
599 |
600 | html += '
';
626 |
627 | squareColor = (squareColor === 'white' ? 'black' : 'white');
628 |
629 | if (orientation === 'white') {
630 | row--;
631 | }
632 | else {
633 | row++;
634 | }
635 | }
636 |
637 | return html;
638 | }
639 |
640 | function buildPieceImgSrc(piece) {
641 | if (typeof cfg.pieceTheme === 'function') {
642 | return cfg.pieceTheme(piece);
643 | }
644 |
645 | if (typeof cfg.pieceTheme === 'string') {
646 | return cfg.pieceTheme.replace(/{piece}/g, piece);
647 | }
648 |
649 | // NOTE: this should never happen
650 | error(8272, 'Unable to build image source for cfg.pieceTheme.');
651 | return '';
652 | }
653 |
654 | function buildPiece(piece, hidden, id) {
655 | var html = '';
605 |
606 | if (cfg.showNotation === true) {
607 | // alpha notation
608 | if ((orientation === 'white' && row === 1) ||
609 | (orientation === 'black' && row === 8)) {
610 | html += '
'; // end .square
622 |
623 | squareColor = (squareColor === 'white' ? 'black' : 'white');
624 | }
625 | html += '' +
611 | alpha[j] + '
';
612 | }
613 |
614 | // numeric notation
615 | if (j === 0) {
616 | html += '' +
617 | row + '
';
618 | }
619 | }
620 |
621 | html += '" }) 1228 | */ 1229 | var newline = (typeof options === 'object' && 1230 | typeof options.newline_char === 'string') ? 1231 | options.newline_char : '\n'; 1232 | var max_width = (typeof options === 'object' && 1233 | typeof options.max_width === 'number') ? 1234 | options.max_width : 0; 1235 | var result = []; 1236 | var header_exists = false; 1237 | 1238 | /* add the PGN header headerrmation */ 1239 | for (var i in header) { 1240 | /* TODO: order of enumerated properties in header object is not 1241 | * guaranteed, see ECMA-262 spec (section 12.6.4) 1242 | */ 1243 | result.push('[' + i + ' \"' + header[i] + '\"]' + newline); 1244 | header_exists = true; 1245 | } 1246 | 1247 | if (header_exists && history.length) { 1248 | result.push(newline); 1249 | } 1250 | 1251 | /* pop all of history onto reversed_history */ 1252 | var reversed_history = []; 1253 | while (history.length > 0) { 1254 | reversed_history.push(undo_move()); 1255 | } 1256 | 1257 | var moves = []; 1258 | var move_string = ''; 1259 | var pgn_move_number = 1; 1260 | 1261 | /* build the list of moves. a move_string looks like: "3. e3 e6" */ 1262 | while (reversed_history.length > 0) { 1263 | var move = reversed_history.pop(); 1264 | 1265 | /* if the position started with black to move, start PGN with 1. ... */ 1266 | if (pgn_move_number === 1 && move.color === 'b') { 1267 | move_string = '1. ...'; 1268 | pgn_move_number++; 1269 | } else if (move.color === 'w') { 1270 | /* store the previous generated move_string if we have one */ 1271 | if (move_string.length) { 1272 | moves.push(move_string); 1273 | } 1274 | move_string = pgn_move_number + '.'; 1275 | pgn_move_number++; 1276 | } 1277 | 1278 | move_string = move_string + ' ' + move_to_san(move); 1279 | make_move(move); 1280 | } 1281 | 1282 | /* are there any other leftover moves? */ 1283 | if (move_string.length) { 1284 | moves.push(move_string); 1285 | } 1286 | 1287 | /* is there a result? */ 1288 | if (typeof header.Result !== 'undefined') { 1289 | moves.push(header.Result); 1290 | } 1291 | 1292 | /* history should be back to what is was before we started generating PGN, 1293 | * so join together moves 1294 | */ 1295 | if (max_width === 0) { 1296 | return result.join('') + moves.join(' '); 1297 | } 1298 | 1299 | /* wrap the PGN output at max_width */ 1300 | var current_width = 0; 1301 | for (var i = 0; i < moves.length; i++) { 1302 | /* if the current move will push past max_width */ 1303 | if (current_width + moves[i].length > max_width && i !== 0) { 1304 | 1305 | /* don't end the line with whitespace */ 1306 | if (result[result.length - 1] === ' ') { 1307 | result.pop(); 1308 | } 1309 | 1310 | result.push(newline); 1311 | current_width = 0; 1312 | } else if (i !== 0) { 1313 | result.push(' '); 1314 | current_width++; 1315 | } 1316 | result.push(moves[i]); 1317 | current_width += moves[i].length; 1318 | } 1319 | 1320 | return result.join(''); 1321 | }, 1322 | 1323 | load_pgn: function(pgn, options) { 1324 | function mask(str) { 1325 | return str.replace(/\n/g, '\\n').replace(/\r/g, '\\r'); 1326 | } 1327 | 1328 | /* convert a move from Standard Algebraic Notation (SAN) to 0x88 1329 | * coordinates 1330 | */ 1331 | function move_from_san(move) { 1332 | var to, from, flags = BITS.NORMAL, promotion; 1333 | var parse = move.match(/^([NBKRQ])?([abcdefgh12345678][12345678]?)?(x)?([abcdefgh][12345678])(=?[NBRQ])?/); 1334 | if (move.slice(0, 5) === 'O-O-O') { 1335 | from = kings[turn]; 1336 | to = from - 2; 1337 | flags = BITS.QSIDE_CASTLE; 1338 | } else if (move.slice(0, 3) === 'O-O') { 1339 | from = kings[turn]; 1340 | to = from + 2; 1341 | flags = BITS.KSIDE_CASTLE; 1342 | } else if (parse && parse[1]) { 1343 | // regular moves 1344 | var piece = parse[1].toLowerCase(); 1345 | if (parse[3]) { 1346 | // capture 1347 | flags = BITS.CAPTURE; 1348 | } 1349 | to = SQUARES[parse[4]]; 1350 | for (var j = 0, len = PIECE_OFFSETS[piece].length; j < len; j++) { 1351 | var offset = PIECE_OFFSETS[piece][j]; 1352 | var square = to; 1353 | 1354 | while (true) { 1355 | square += offset; 1356 | if (square & 0x88) break; 1357 | 1358 | var b = board[square]; 1359 | if (b) { 1360 | if (b.color === turn && b.type === piece && (!parse[2] || algebraic(square).indexOf(parse[2]) >= 0)) { 1361 | from = square; 1362 | } 1363 | break; 1364 | } 1365 | 1366 | /* break, if knight or king */ 1367 | if (piece === 'n' || piece === 'k') break; 1368 | } 1369 | } 1370 | } else if (parse) { 1371 | // pawn move 1372 | if (parse[3]) { 1373 | // capture 1374 | to = SQUARES[parse[4]]; 1375 | for (var j = 2; j < 4; j++) { 1376 | var square = to - PAWN_OFFSETS[turn][j]; 1377 | if (square & 0x88) continue; 1378 | 1379 | if (board[square] != null && 1380 | board[square].color === turn && 1381 | algebraic(square)[0] === parse[2]) { 1382 | from = square; 1383 | } 1384 | } 1385 | if (board[to]) { 1386 | flags = BITS.CAPTURE; 1387 | } else { 1388 | flags = BITS.EP_CAPTURE; 1389 | } 1390 | } else { 1391 | // normal move 1392 | to = SQUARES[move.slice(0,2)]; 1393 | var c = to - PAWN_OFFSETS[turn][0], 1394 | b = board[c]; 1395 | if (b && b.type === PAWN && b.color === turn) { 1396 | from = c; 1397 | } else { 1398 | c = to - PAWN_OFFSETS[turn][1]; 1399 | b = board[c]; 1400 | if (b && b.type === PAWN && b.color === turn) { 1401 | from = c; 1402 | flags = BITS.BIG_PAWN; 1403 | } 1404 | } 1405 | } 1406 | // promotion? 1407 | if (parse[5]) { 1408 | if(typeof parse[5][1] == 'undefined') { 1409 | promotion = parse[5][0].toLowerCase(); 1410 | } else { 1411 | promotion = parse[5][1].toLowerCase(); 1412 | } 1413 | } 1414 | } 1415 | if (from >=0 && to >=0 && flags) { 1416 | return build_move(board, from, to, flags, promotion); 1417 | } else if (move.length > 0) { 1418 | /* alert(move); // error in PGN, or in parsing. */ 1419 | } 1420 | } 1421 | 1422 | function get_move_obj(move) { 1423 | return move_from_san(trim(move)); 1424 | } 1425 | 1426 | function has_keys(object) { 1427 | var has_keys = false; 1428 | for (var key in object) { 1429 | has_keys = true; 1430 | } 1431 | return has_keys; 1432 | } 1433 | 1434 | function parse_pgn_header(header, options) { 1435 | var newline_char = (typeof options === 'object' && 1436 | typeof options.newline_char === 'string') ? 1437 | options.newline_char : '\r?\n'; 1438 | var header_obj = {}; 1439 | var headers = header.split(newline_char); 1440 | var key = ''; 1441 | var value = ''; 1442 | 1443 | for (var i = 0; i < headers.length; i++) { 1444 | key = headers[i].replace(/^\[([A-Z][A-Za-z]*)\s.*\]$/, '$1'); 1445 | value = headers[i].replace(/^\[[A-Za-z]+\s"(.*)"\]$/, '$1'); 1446 | if (trim(key).length > 0) { 1447 | header_obj[key] = value; 1448 | } 1449 | } 1450 | 1451 | return header_obj; 1452 | } 1453 | 1454 | var newline_char = (typeof options === 'object' && 1455 | typeof options.newline_char === 'string') ? 1456 | options.newline_char : '\r?\n'; 1457 | var regex = new RegExp('^(\\[(.|' + mask(newline_char) + ')*\\])' + 1458 | '(' + mask(newline_char) + ')*' + 1459 | '1.(' + mask(newline_char) + '|.)*$', 'g'); 1460 | 1461 | /* get header part of the PGN file */ 1462 | var header_string = pgn.replace(regex, '$1'); 1463 | 1464 | /* no info part given, begins with moves */ 1465 | if (header_string[0] !== '[') { 1466 | header_string = ''; 1467 | } 1468 | 1469 | reset(); 1470 | 1471 | /* parse PGN header */ 1472 | var headers = parse_pgn_header(header_string, options); 1473 | for (var key in headers) { 1474 | set_header([key, headers[key]]); 1475 | } 1476 | 1477 | /* delete header to get the moves */ 1478 | var ms = pgn.replace(header_string, '').replace(new RegExp(mask(newline_char), 'g'), ' '); 1479 | 1480 | /* delete comments */ 1481 | ms = ms.replace(/(\{[^}]+\})+?/g, ''); 1482 | 1483 | /* delete move numbers */ 1484 | ms = ms.replace(/\d+\./g, ''); 1485 | 1486 | 1487 | /* trim and get array of moves */ 1488 | var moves = trim(ms).split(new RegExp(/\s+/)); 1489 | 1490 | /* delete empty entries */ 1491 | moves = moves.join(',').replace(/,,+/g, ',').split(','); 1492 | var move = ''; 1493 | 1494 | for (var half_move = 0; half_move < moves.length - 1; half_move++) { 1495 | move = get_move_obj(moves[half_move]); 1496 | 1497 | /* move not possible! (don't clear the board to examine to show the 1498 | * latest valid position) 1499 | */ 1500 | if (move == null) { 1501 | return false; 1502 | } else { 1503 | make_move(move); 1504 | } 1505 | } 1506 | 1507 | /* examine last move */ 1508 | move = moves[moves.length - 1]; 1509 | if (POSSIBLE_RESULTS.indexOf(move) > -1) { 1510 | if (has_keys(header) && typeof header.Result === 'undefined') { 1511 | set_header(['Result', move]); 1512 | } 1513 | } 1514 | else { 1515 | move = get_move_obj(move); 1516 | if (move == null) { 1517 | return false; 1518 | } else { 1519 | make_move(move); 1520 | } 1521 | } 1522 | return true; 1523 | }, 1524 | 1525 | header: function() { 1526 | return set_header(arguments); 1527 | }, 1528 | 1529 | ascii: function() { 1530 | return ascii(); 1531 | }, 1532 | 1533 | turn: function() { 1534 | return turn; 1535 | }, 1536 | 1537 | move: function(move) { 1538 | /* The move function can be called with in the following parameters: 1539 | * 1540 | * .move('Nxb7') <- where 'move' is a case-sensitive SAN string 1541 | * 1542 | * .move({ from: 'h7', <- where the 'move' is a move object (additional 1543 | * to :'h8', fields are ignored) 1544 | * promotion: 'q', 1545 | * }) 1546 | */ 1547 | var move_obj = null; 1548 | var moves = generate_moves(); 1549 | 1550 | if (typeof move === 'string') { 1551 | /* convert the move string to a move object */ 1552 | for (var i = 0, len = moves.length; i < len; i++) { 1553 | if (move === move_to_san(moves[i])) { 1554 | move_obj = moves[i]; 1555 | break; 1556 | } 1557 | } 1558 | } else if (typeof move === 'object') { 1559 | /* convert the pretty move object to an ugly move object */ 1560 | for (var i = 0, len = moves.length; i < len; i++) { 1561 | if (move.from === algebraic(moves[i].from) && 1562 | move.to === algebraic(moves[i].to) && 1563 | (!('promotion' in moves[i]) || 1564 | move.promotion === moves[i].promotion)) { 1565 | move_obj = moves[i]; 1566 | break; 1567 | } 1568 | } 1569 | } 1570 | 1571 | /* failed to find move */ 1572 | if (!move_obj) { 1573 | return null; 1574 | } 1575 | 1576 | /* need to make a copy of move because we can't generate SAN after the 1577 | * move is made 1578 | */ 1579 | var pretty_move = make_pretty(move_obj); 1580 | 1581 | make_move(move_obj); 1582 | 1583 | return pretty_move; 1584 | }, 1585 | 1586 | undo: function() { 1587 | var move = undo_move(); 1588 | return (move) ? make_pretty(move) : null; 1589 | }, 1590 | 1591 | clear: function() { 1592 | return clear(); 1593 | }, 1594 | 1595 | put: function(piece, square) { 1596 | return put(piece, square); 1597 | }, 1598 | 1599 | get: function(square) { 1600 | return get(square); 1601 | }, 1602 | 1603 | remove: function(square) { 1604 | return remove(square); 1605 | }, 1606 | 1607 | perft: function(depth) { 1608 | return perft(depth); 1609 | }, 1610 | 1611 | square_color: function(square) { 1612 | if (square in SQUARES) { 1613 | var sq_0x88 = SQUARES[square]; 1614 | return ((rank(sq_0x88) + file(sq_0x88)) % 2 === 0) ? 'light' : 'dark'; 1615 | } 1616 | 1617 | return null; 1618 | }, 1619 | 1620 | history: function(options) { 1621 | var reversed_history = []; 1622 | var move_history = []; 1623 | var verbose = (typeof options !== 'undefined' && 'verbose' in options && 1624 | options.verbose); 1625 | 1626 | while (history.length > 0) { 1627 | reversed_history.push(undo_move()); 1628 | } 1629 | 1630 | while (reversed_history.length > 0) { 1631 | var move = reversed_history.pop(); 1632 | if (verbose) { 1633 | move_history.push(make_pretty(move)); 1634 | } else { 1635 | move_history.push(move_to_san(move)); 1636 | } 1637 | make_move(move); 1638 | } 1639 | 1640 | return move_history; 1641 | } 1642 | 1643 | }; 1644 | }; 1645 | 1646 | /* export Chess object if using node or any other CommonJS compatible 1647 | * environment */ 1648 | if (typeof exports !== 'undefined') exports.Chess = Chess; 1649 | /* export Chess object for any RequireJS compatible environment */ 1650 | if (typeof define !== 'undefined') define( function () { return Chess; }); 1651 | --------------------------------------------------------------------------------