(function() {
var board = null;
-var history = [];
+var game = new Chess();
+var fens = [];
var move_override = 0;
var includetransp = true;
+var stockfish = new Worker('/js/stockfish.js');
+var engine_running = false;
+var engine_replacement_callback = null;
+var recommended_dest = null;
var entity_map = {
"&": "&",
});
}
-var get_game = function(skip_last_move) {
- var moves_to_drop = 0;
- if (skip_last_move === true) {
- moves_to_drop = 1;
- }
-
- var game = new Chess();
- for (var i = 0; i < move_override - moves_to_drop; ++i) {
- game.move(history[i]);
+var current_display_fen = function() {
+ if (move_override == 0) {
+ return 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1';
+ } else {
+ return fens[move_override - 1];
}
- return game;
}
var update = function() {
var text = "";
+ var history = game.history({ verbose: true });
for (var i = 0; i < history.length; ++i) {
if (i % 2 == 0) {
text += (i/2 + 1) + ". ";
}
if (i + 1 == move_override) {
- text += '<strong>' + history[i] + '</strong>';
+ text += '<strong>' + history[i].san + '</strong>';
} else {
- text += '<a href="javascript:set_move(' + (i + 1) + ')">' + history[i] + '</a>';
+ text += '<a href="javascript:set_move(' + (i + 1) + ')">' + history[i].san + '</a>';
}
text += " ";
}
$('#gamehistory').html(text);
- var game = get_game();
- board.position(game.fen());
+ if (board.fen() != current_display_fen()) {
+ board.position(current_display_fen());
+ }
- var all_moves = game.history({ verbose: true });
- if (all_moves.length > 0) {
- var last_move = all_moves.pop();
+ $("#board").find('.square-55d63').removeClass('nonuglyhighlight');
+ if (move_override > 0) {
+ var last_move = history[move_override - 1];
var highlight_from = last_move.from;
var highlight_to = last_move.to;
- $("#board").find('.square-55d63').removeClass('nonuglyhighlight');
$("#board").find('.square-' + highlight_from).addClass('nonuglyhighlight');
$("#board").find('.square-' + highlight_to).addClass('nonuglyhighlight');
}
fetch_analysis();
}
+var get_history_url = function() {
+ var history = game.history({ verbose: true }).map(function(x) { return x.san; });
+ history.length = move_override;
+ return '/?' + history.join(',');
+}
+
var fetch_analysis = function() {
- var game = get_game();
- var fen = game.fen();
- var prevfen = "";
- if (move_override > 0) {
- prevfen = get_game(true).fen();
- }
+ var fen = current_display_fen();
$.ajax({
url: "/opening-stats.pl?fen=" + encodeURIComponent(fen) +
- ";prevfen=" + encodeURIComponent(prevfen) +
";includetransp=" + (includetransp ? 1 : 0)
}).done(function(data, textstatus, xhr) {
show_lines(data, game);
[ "Move", TYPE_MOVE ],
[ "Games", TYPE_INTEGER ],
[ "%", TYPE_RATIO ],
+ [ "CGames", TYPE_INTEGER ],
+ [ "Hum", TYPE_RATIO ],
[ "Win%", TYPE_RATIO ],
[ "WWin", TYPE_INTEGER ],
[ "%WW", TYPE_RATIO ],
}
var lines = [];
+ var transpose_only = [];
for (var i = 0; i < moves.length; ++i) {
var move = moves[i];
var line = [];
var white = parseInt(move['white']);
var draw = parseInt(move['draw']);
var black = parseInt(move['black']);
+ var computer = parseInt(move['computer']);
line.push(move['move']); // Move.
+ transpose_only.push(move['transpose_only']);
var num = white + draw + black;
line.push(num); // N.
line.push(num / total_num); // %.
+ line.push(computer); // CGames.
+
+ // Adjust so that the human index is 50% overall.
+ var exp = Math.log(0.5) / Math.log(data['computer_games'] / data['total_games']);
+ line.push(1.0 - Math.pow(computer / num, exp)); // Hum.
// Win%.
var white_win_ratio = (white + 0.5 * draw) / num;
- var win_ratio = (game.turn() == 'w') ? white_win_ratio : 1.0 - white_win_ratio;
+ var win_ratio = (move_override % 2 == 0) ? white_win_ratio : 1.0 - white_win_ratio;
line.push(win_ratio);
line.push(white); // WWin.
var win_elo = -400.0 * Math.log(1.0 / white_win_ratio - 1.0) / Math.LN10;
win_elo -= (move['white_avg_elo'] - move['black_avg_elo']);
white_win_ratio = 1.0 / (1.0 + Math.pow(10, win_elo / -400.0));
- win_ratio = (game.turn() == 'w') ? white_win_ratio : 1.0 - white_win_ratio;
+ win_ratio = (move_override % 2 == 0) ? white_win_ratio : 1.0 - white_win_ratio;
line.push(win_ratio);
} else {
line.push(null);
if (line[0] === undefined) {
$(tr).addClass("totals");
+ } else if (transpose_only[i]) {
+ $(tr).addClass("transponly");
}
for (var j = 0; j < line.length; ++j) {
td.appendChild(move_a);
$(move_a).text(line[j]);
} else if (headings[j][1] == TYPE_INTEGER) {
- add_td(tr, line[j]);
+ add_td(tr, line[j] || 0);
} else if (headings[j][1] == TYPE_FLOAT) {
- add_td(tr, line[j].toFixed(1));
+ if (isNaN(line[j]) || !isFinite(line[j])) {
+ add_td(tr, '');
+ } else {
+ add_td(tr, line[j].toFixed(1));
+ }
} else {
- add_td(tr, (100.0 * line[j]).toFixed(1) + "%");
+ if (isNaN(line[j]) || !isFinite(line[j])) {
+ add_td(tr, '');
+ } else {
+ add_td(tr, (100.0 * line[j]).toFixed(1) + "%");
+ }
}
}
}
window['set_includetransp'] = set_includetransp;
-var make_move = function(move) {
- if (move_override < history.length && history[move_override] == move) {
+var make_move = function(move, do_update) {
+ var history = game.history({ verbose: true });
+ if (move_override < history.length && history[move_override].san == move) {
// User effectively only moved forward in history.
++move_override;
} else {
- history.length = move_override;
- history.push(move);
- move_override = history.length;
+ var moves = game.history();
+ // Truncate the history if needed.
+ if (move_override < moves.length) {
+ game = new Chess();
+ for (var i = 0; i < move_override; ++i) {
+ game.move(moves[i]);
+ }
+ fens.length = move_override;
+ }
+ game.move(move);
+ fens.push(game.fen());
+ ++move_override;
+ }
+
+ if (do_update !== false) {
+ update();
+ window.history.pushState(null, null, get_history_url());
}
- update();
}
window['make_move'] = make_move;
if (move_override > 0) {
--move_override;
update();
+ window.history.replaceState(null, null, get_history_url());
}
}
window['prev_move'] = prev_move;
var next_move = function() {
- if (move_override < history.length) {
+ if (move_override < game.history().length) {
++move_override;
update();
+ window.history.replaceState(null, null, get_history_url());
}
}
window['next_move'] = next_move;
-var set_move = function(n) {
+var set_move = function(n, do_update) {
move_override = n;
- update();
+ if (do_update !== false) {
+ update();
+ window.history.replaceState(null, null, get_history_url());
+ }
}
window['set_move'] = set_move;
// almost all of this stuff comes from the chessboard.js example page
var onDragStart = function(source, piece, position, orientation) {
- var game = get_game();
- if (game.game_over() === true ||
- (game.turn() === 'w' && piece.search(/^b/) !== -1) ||
- (game.turn() === 'b' && piece.search(/^w/) !== -1)) {
+ var pseudogame = new Chess(current_display_fen());
+ if (pseudogame.game_over() === true ||
+ (pseudogame.turn() === 'w' && piece.search(/^b/) !== -1) ||
+ (pseudogame.turn() === 'b' && piece.search(/^w/) !== -1)) {
return false;
}
+
+ recommended_dest = null;
+ get_best_dest(pseudogame, source, function(dest) {
+ $("#board").find('.square-55d63').removeClass('nonuglyhighlight');
+ if (dest !== null) {
+ var squareEl = $('#board .square-' + dest);
+ squareEl.addClass('highlight1-32417');
+ }
+ recommended_dest = dest;
+ });
+}
+
+var get_best_dest = function(game, source, cb) {
+ var moves = game.moves({ square: source, verbose: true });
+ if (moves.length == 0) {
+ cb(null);
+ return;
+ }
+ if (moves.length == 1) {
+ cb(moves[0].to);
+ return;
+ }
+
+ // More than one move. Ask the engine to disambiguate.
+ var uci_moves = moves.map(function(m) { return m.from + m.to; });
+ var when_engine_is_ready = function() {
+ engine_running = true;
+ stockfish.onmessage = function(event) {
+ var res = event.data.match(/^bestmove \S\S(\S\S)/);
+ if (res !== null) {
+ engine_running = false;
+ if (engine_replacement_callback !== null) {
+ // We are no longer interested in this query,
+ // so just discard it and call this other callback.
+ engine_replacement_callback();
+ engine_replacement_callback = null;
+ } else {
+ cb(res[1]);
+ }
+ }
+ };
+ stockfish.postMessage("position fen " + game.fen());
+ stockfish.postMessage("go depth 6 searchmoves " + uci_moves.join(" "));
+ };
+ if (engine_running) {
+ engine_replacement_callback = when_engine_is_ready;
+ } else {
+ when_engine_is_ready();
+ }
}
var onDrop = function(source, target) {
+ if (engine_running) {
+ // Snap end before the engine came back.
+ // Discard the result when it does.
+ engine_replacement_callback = function() {};
+ }
+ if (source == target) {
+ if (recommended_dest === null) {
+ return 'snapback';
+ } else {
+ // Accept the move. It will be changed in onSnapEnd.
+ return;
+ }
+ } else {
+ // Suggestion not asked for.
+ recommended_dest = null;
+ }
+
// see if the move is legal
- var game = get_game();
- var move = game.move({
+ var pseudogame = new Chess(current_display_fen());
+ var move = pseudogame.move({
from: source,
to: target,
promotion: 'q' // NOTE: always promote to a queen for example simplicity
// illegal move
if (move === null) return 'snapback';
+}
- var new_history = game.history({ verbose: true });
- history = [];
- for (var i = 0; i < new_history.length; ++i) {
- history.push(new_history[i].san);
+var onSnapEnd = function(source, target) {
+ if (source == target && recommended_dest !== null) {
+ target = recommended_dest;
+ }
+ recommended_dest = null;
+ var pseudogame = new Chess(current_display_fen());
+ var move = pseudogame.move({
+ from: source,
+ to: target,
+ promotion: 'q' // NOTE: always promote to a queen for example simplicity
+ });
+
+ make_move(pseudogame.history({ verbose: true }).pop().san);
+}
+
+var onpopstate = function() {
+ var old_moves = game.history({ verbose: true }).map(function(x) { return x.san; });
+ var new_moves = document.location.search.replace(/^\?/, "").split(",");
+
+ if (new_moves.length == 1 && new_moves[0] == "") {
+ new_moves = [];
}
- move_override = history.length;
-};
-// update the board position after the piece snap
-// for castling, en passant, pawn promotion
-var onSnapEnd = function() {
- var game = get_game();
- board.position(game.fen());
+ var num_shared_moves;
+ for (num_shared_moves = 0; num_shared_moves < Math.min(old_moves.length, new_moves.length); ++num_shared_moves) {
+ if (old_moves[i] != new_moves[i]) {
+ break;
+ }
+ }
+
+ set_move(num_shared_moves, false);
+ for (var i = num_shared_moves; i < new_moves.length; ++i) {
+ make_move(new_moves[i], false);
+ }
update();
-};
+ window.history.replaceState(null, null, get_history_url());
+}
var init = function() {
// Create board.
onDrop: onDrop,
onSnapEnd: onSnapEnd
});
- update();
+
+ window.onpopstate = onpopstate;
+ onpopstate();
$(window).keyup(function(event) {
if (event.which == 39) {
projects / remoteglot-book / blobdiff