2 var hiddenboard = null;
4 var arrow_targets = [];
5 var occupied_by_arrows = [];
6 var refutation_lines = [];
10 var sort_refutation_lines_by_score = 0;
11 var highlight_from = undefined;
12 var highlight_to = undefined;
13 var unique = Math.random();
16 var display_lines = [];
17 var current_display_line = null;
18 var current_display_move = null;
20 var request_update = function(board) {
22 url: "http://analysis.sesse.net/analysis.pl?ims=" + ims + "&unique=" + unique
23 //url: "http://analysis.sesse.net:5000/analysis.pl?ims=" + ims + "&unique=" + unique
24 }).done(function(data, textstatus, xhr) {
25 ims = xhr.getResponseHeader('X-Remoteglot-Last-Modified');
26 var num_viewers = xhr.getResponseHeader('X-Remoteglot-Num-Viewers');
27 update_board(board, data, num_viewers);
29 // Wait ten seconds, then try again.
30 setTimeout(function() { request_update(board); }, 10000);
34 var clear_arrows = function() {
35 for (var i = 0; i < arrows.length; ++i) {
36 jsPlumb.detach(arrows[i].connection1);
37 jsPlumb.detach(arrows[i].connection2);
41 for (var i = 0; i < arrow_targets.length; ++i) {
42 document.body.removeChild(arrow_targets[i]);
46 occupied_by_arrows = [];
47 for (var y = 0; y < 8; ++y) {
48 occupied_by_arrows.push([false, false, false, false, false, false, false, false]);
52 var redraw_arrows = function() {
53 for (var i = 0; i < arrows.length; ++i) {
54 position_arrow(arrows[i]);
58 var sign = function(x) {
68 // See if drawing this arrow on the board would cause unduly amount of confusion.
69 var interfering_arrow = function(from, to) {
70 var from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
71 var from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
72 var to_col = to.charCodeAt(0) - "a1".charCodeAt(0);
73 var to_row = to.charCodeAt(1) - "a1".charCodeAt(1);
75 occupied_by_arrows[from_row][from_col] = true;
77 // Knight move: Just check that we haven't been at the destination before.
78 if ((Math.abs(to_col - from_col) == 2 && Math.abs(to_row - from_row) == 1) ||
79 (Math.abs(to_col - from_col) == 1 && Math.abs(to_row - from_row) == 2)) {
80 return occupied_by_arrows[to_row][to_col];
83 // Sliding piece: Check if anything except the from-square is seen before.
84 var dx = sign(to_col - from_col);
85 var dy = sign(to_row - from_row);
91 if (occupied_by_arrows[y][x]) {
94 occupied_by_arrows[y][x] = true;
95 } while (x != to_col || y != to_row);
100 var add_target = function() {
101 var elem = document.createElement("div");
102 $(elem).addClass("window");
103 elem.id = "target" + arrow_targets.length;
104 document.body.appendChild(elem);
105 arrow_targets.push(elem);
109 var position_arrow = function(arrow) {
110 var zoom_factor = $("#board").width() / 400.0;
111 var line_width = arrow.line_width * zoom_factor;
112 var arrow_size = arrow.arrow_size * zoom_factor;
114 var square_width = $(".square-a8").width();
115 var from_y = (7 - arrow.from_row + 0.5)*square_width;
116 var to_y = (7 - arrow.to_row + 0.5)*square_width;
117 var from_x = (arrow.from_col + 0.5)*square_width;
118 var to_x = (arrow.to_col + 0.5)*square_width;
120 var dx = to_x - from_x;
121 var dy = to_y - from_y;
122 var len = Math.sqrt(dx * dx + dy * dy);
125 var pos = $(".square-a8").position();
126 $("#" + arrow.s1).css({ top: pos.top + from_y + (0.5 * arrow_size) * dy, left: pos.left + from_x + (0.5 * arrow_size) * dx });
127 $("#" + arrow.d1).css({ top: pos.top + to_y - (0.5 * arrow_size) * dy, left: pos.left + to_x - (0.5 * arrow_size) * dx });
128 $("#" + arrow.s1v).css({ top: pos.top + from_y - 0 * dy, left: pos.left + from_x - 0 * dx });
129 $("#" + arrow.d1v).css({ top: pos.top + to_y + 0 * dy, left: pos.left + to_x + 0 * dx });
131 if (arrow.connection1) {
132 jsPlumb.detach(arrow.connection1);
134 if (arrow.connection2) {
135 jsPlumb.detach(arrow.connection2);
137 if (current_display_line !== null) {
138 delete arrow.connection1;
139 delete arrow.connection2;
142 arrow.connection1 = jsPlumb.connect({
145 connector:["Straight"],
148 endpointClass:"c1Endpoint",
151 lineWidth:line_width,
152 strokeStyle:arrow.fg_color,
158 arrow.connection2 = jsPlumb.connect({
161 connector:["Straight"],
164 endpointClass:"c1Endpoint",
168 strokeStyle:arrow.fg_color,
179 lineWidth:line_width,
187 var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
188 var from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
189 var from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
190 var to_col = to_square.charCodeAt(0) - "a1".charCodeAt(0);
191 var to_row = to_square.charCodeAt(1) - "a1".charCodeAt(1);
203 line_width: line_width,
204 arrow_size: arrow_size,
208 position_arrow(arrow);
212 var compare_by_sort_key = function(refutation_lines, toplay, a, b) {
213 var ska = refutation_lines[a].sort_key;
214 var skb = refutation_lines[b].sort_key;
215 if (ska < skb) return -1;
216 if (ska > skb) return 1;
220 var compare_by_score = function(refutation_lines, toplay, a, b) {
221 var sa = parseInt(refutation_lines[b].score_sort_key);
222 var sb = parseInt(refutation_lines[a].score_sort_key);
230 // Fake multi-PV using the refutation lines. Find all “relevant” moves,
231 // sorted by quality, descending.
232 var find_nonstupid_moves = function(data, margin) {
233 // First of all, if there are any moves that are more than 0.5 ahead of
234 // the primary move, the refutation lines are probably bunk, so just
236 var best_score = undefined;
237 var pv_score = undefined;
238 for (var move in data.refutation_lines) {
239 var score = parseInt(data.refutation_lines[move].score_sort_key);
240 if (move == data.pv_uci[0]) {
243 if (best_score === undefined || score > best_score) {
246 if (!(data.refutation_lines[move].depth >= 8)) {
251 if (best_score - pv_score > 50) {
255 // Now find all moves that are within “margin” of the best score.
256 // The PV move will always be first.
258 for (var move in data.refutation_lines) {
259 var score = parseInt(data.refutation_lines[move].score_sort_key);
260 if (move != data.pv_uci[0] && best_score - score <= margin) {
264 moves = moves.sort(function(a, b) { return compare_by_score(data.refutation_lines, data.position.toplay, a, b) });
265 moves.unshift(data.pv_uci[0]);
270 var thousands = function(x) {
271 return String(x).split('').reverse().join('').replace(/(\d{3}\B)/g, '$1,').split('').reverse().join('');
274 var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, limit) {
284 var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + 0 + ");\">" + pretty_pv[0] + "</a>";
285 pv = move_num + '. … ' + move;
290 for ( ; i < pretty_pv.length; ++i) {
291 var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + i + ");\">" + pretty_pv[i] + "</a>";
300 pv += move_num + '. ' + move;
311 var update_highlight = function() {
312 $("#board").find('.square-55d63').removeClass('nonuglyhighlight');
313 if (current_display_line === null && highlight_from !== undefined && highlight_to !== undefined) {
314 $("#board").find('.square-' + highlight_from).addClass('nonuglyhighlight');
315 $("#board").find('.square-' + highlight_to).addClass('nonuglyhighlight');
319 var update_refutation_lines = function(board) {
320 if (display_lines.length > 1) {
321 display_lines = [ display_lines[0] ];
324 var tbl = $("#refutationlines");
328 for (var move in refutation_lines) {
331 var compare = sort_refutation_lines_by_score ? compare_by_score : compare_by_sort_key;
332 moves = moves.sort(function(a, b) { return compare(refutation_lines, toplay, a, b) });
333 for (var i = 0; i < moves.length; ++i) {
334 var line = refutation_lines[moves[i]];
336 var tr = document.createElement("tr");
338 var move_td = document.createElement("td");
339 tr.appendChild(move_td);
340 $(move_td).addClass("move");
341 if (line.pv_uci.length == 0) {
342 $(move_td).text(line.pretty_move);
344 var move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line.pretty_move + "</a>";
345 $(move_td).html(move);
348 var score_td = document.createElement("td");
349 tr.appendChild(score_td);
350 $(score_td).addClass("score");
351 $(score_td).text(line.pretty_score);
353 var depth_td = document.createElement("td");
354 tr.appendChild(depth_td);
355 $(depth_td).addClass("depth");
356 $(depth_td).text("d" + line.depth);
358 var pv_td = document.createElement("td");
359 tr.appendChild(pv_td);
360 $(pv_td).addClass("pv");
361 $(pv_td).html(print_pv(fen, line.pv_uci, line.pv_pretty, move_num, toplay, 10));
366 // Make one of the links clickable and the other nonclickable.
367 if (sort_refutation_lines_by_score) {
368 $("#sortbyscore0").html("<a href=\"javascript:resort_refutation_lines(0)\">Move</a>");
369 $("#sortbyscore1").html("<strong>Score</strong>");
371 $("#sortbyscore0").html("<strong>Move</strong>");
372 $("#sortbyscore1").html("<a href=\"javascript:resort_refutation_lines(1)\">Score</a>");
376 var update_board = function(board, data, num_viewers) {
380 var headline = 'Analysis';
381 if (data.position.last_move !== 'none') {
382 headline += ' after ' + data.position.move_num + '. ';
383 if (data.position.toplay == 'W') {
386 headline += data.position.last_move;
389 $("#headline").text(headline);
391 if (num_viewers === null) {
392 $("#numviewers").text("");
393 } else if (num_viewers == 1) {
394 $("#numviewers").text("You are the only current viewer");
396 $("#numviewers").text(num_viewers + " current viewers");
400 if (data.score !== null) {
401 $("#score").text(data.score);
405 if (data.nodes && data.nps && data.depth) {
406 var stats = thousands(data.nodes) + ' nodes, ' + thousands(data.nps) + ' nodes/sec, depth ' + data.depth + ' ply';
408 stats += ' (' + data.seldepth + ' selective)';
410 if (data.tbhits && data.tbhits > 0) {
411 if (data.tbhits == 1) {
412 stats += ', one Nalimov hit';
414 stats += ', ' + data.tbhits + ' Nalimov hits';
419 $("#searchstats").text(stats);
422 // Update the board itself.
423 fen = data.position.fen;
424 update_displayed_line();
426 if (data.position.last_move_uci) {
427 highlight_from = data.position.last_move_uci.substr(0, 2);
428 highlight_to = data.position.last_move_uci.substr(2, 4);
430 highlight_from = highlight_to = undefined;
435 $("#pv").html(print_pv(data.position.fen, data.pv_uci, data.pv_pretty, data.position.move_num, data.position.toplay));
437 // Update the PV arrow.
439 if (data.pv_uci.length >= 1) {
440 // draw a continuation arrow as long as it's the same piece
441 for (var i = 0; i < data.pv_uci.length; i += 2) {
442 var from = data.pv_uci[i].substr(0, 2);
443 var to = data.pv_uci[i].substr(2,4);
444 if ((i >= 2 && from != data.pv_uci[i - 2].substr(2, 4)) ||
445 interfering_arrow(from, to)) {
448 create_arrow(from, to, '#f66', 6, 20);
451 var alt_moves = find_nonstupid_moves(data, 30);
452 for (var i = 1; i < alt_moves.length && i < 3; ++i) {
453 create_arrow(alt_moves[i].substr(0, 2),
454 alt_moves[i].substr(2, 4), '#f66', 1, 10);
458 // See if all semi-reasonable moves have only one possible response.
459 if (data.pv_uci.length >= 2) {
460 var nonstupid_moves = find_nonstupid_moves(data, 300);
461 var response = data.pv_uci[1];
462 for (var i = 0; i < nonstupid_moves.length; ++i) {
463 if (nonstupid_moves[i] == data.pv_uci[0]) {
464 // ignore the PV move for refutation lines.
467 if (!data.refutation_lines ||
468 !data.refutation_lines[nonstupid_moves[i]] ||
469 !data.refutation_lines[nonstupid_moves[i]].pv_uci ||
470 data.refutation_lines[nonstupid_moves[i]].pv_uci.length < 1) {
471 // Incomplete PV, abort.
472 response = undefined;
475 var this_response = data.refutation_lines[nonstupid_moves[i]].pv_uci[1];
476 if (response !== this_response) {
477 // Different response depending on lines, abort.
478 response = undefined;
483 if (nonstupid_moves.length > 0 && response !== undefined) {
484 create_arrow(response.substr(0, 2),
485 response.substr(2, 4), '#66f', 6, 20);
489 // Update the refutation lines.
490 fen = data.position.fen;
491 move_num = data.position.move_num;
492 toplay = data.position.toplay;
493 refutation_lines = data.refutation_lines;
494 update_refutation_lines(board);
497 setTimeout(function() { request_update(board); }, 100);
500 var resort_refutation_lines = function(sort_by_score) {
501 sort_refutation_lines_by_score = sort_by_score;
502 update_refutation_lines(board);
505 var show_line = function(line_num, move_num) {
506 if (line_num == -1) {
507 current_display_line = null;
508 current_display_move = null;
510 current_display_line = display_lines[line_num];
511 current_display_move = move_num;
513 update_displayed_line();
518 var prev_move = function() {
519 --current_display_move;
520 update_displayed_line();
523 var next_move = function() {
524 ++current_display_move;
525 update_displayed_line();
528 var update_displayed_line = function() {
529 if (current_display_line === null) {
530 $("#linenav").hide();
531 $("#linemsg").show();
536 $("#linenav").show();
537 $("#linemsg").hide();
539 if (current_display_move == 0) {
540 $("#prevmove").html("Previous");
542 $("#prevmove").html("<a href=\"javascript:prev_move();\">Previous</a></span>");
544 if (current_display_move == current_display_line.uci_pv.length - 1) {
545 $("#nextmove").html("Next");
547 $("#nextmove").html("<a href=\"javascript:next_move();\">Next</a></span>");
550 hiddenboard.position(current_display_line.start_fen, false);
551 for (var i = 0; i <= current_display_move; ++i) {
552 var move = current_display_line.uci_pv[i];
553 move = move.substr(0, 2) + "-" + move.substr(2, 4);
554 hiddenboard.move(move, false);
556 board.position(hiddenboard.position());
559 var init = function() {
561 board = new ChessBoard('board', 'start');
562 hiddenboard = new ChessBoard('hiddenboard', 'start');
564 request_update(board);
565 $(window).resize(function() {
571 $(document).ready(init);