4 var hiddenboard = null;
6 var occupied_by_arrows = [];
7 var refutation_lines = [];
11 var sort_refutation_lines_by_score = 0;
12 var highlight_from = undefined;
13 var highlight_to = undefined;
14 var unique = Math.random();
17 var display_lines = [];
18 var current_display_line = null;
19 var current_display_move = null;
21 var request_update = function(board) {
23 url: "http://analysis.sesse.net/analysis.pl?ims=" + ims + "&unique=" + unique
24 //url: "http://analysis.sesse.net:5000/analysis.pl?ims=" + ims + "&unique=" + unique
25 }).done(function(data, textstatus, xhr) {
26 ims = xhr.getResponseHeader('X-Remoteglot-Last-Modified');
27 var num_viewers = xhr.getResponseHeader('X-Remoteglot-Num-Viewers');
28 update_board(board, data, num_viewers);
30 // Wait ten seconds, then try again.
31 setTimeout(function() { request_update(board); }, 10000);
35 var clear_arrows = function() {
36 for (var i = 0; i < arrows.length; ++i) {
38 arrows[i].svg.parentElement.removeChild(arrows[i].svg);
44 occupied_by_arrows = [];
45 for (var y = 0; y < 8; ++y) {
46 occupied_by_arrows.push([false, false, false, false, false, false, false, false]);
50 var redraw_arrows = function() {
51 for (var i = 0; i < arrows.length; ++i) {
52 position_arrow(arrows[i]);
56 var sign = function(x) {
66 // See if drawing this arrow on the board would cause unduly amount of confusion.
67 var interfering_arrow = function(from, to) {
68 var from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
69 var from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
70 var to_col = to.charCodeAt(0) - "a1".charCodeAt(0);
71 var to_row = to.charCodeAt(1) - "a1".charCodeAt(1);
73 occupied_by_arrows[from_row][from_col] = true;
75 // Knight move: Just check that we haven't been at the destination before.
76 if ((Math.abs(to_col - from_col) == 2 && Math.abs(to_row - from_row) == 1) ||
77 (Math.abs(to_col - from_col) == 1 && Math.abs(to_row - from_row) == 2)) {
78 return occupied_by_arrows[to_row][to_col];
81 // Sliding piece: Check if anything except the from-square is seen before.
82 var dx = sign(to_col - from_col);
83 var dy = sign(to_row - from_row);
89 if (occupied_by_arrows[y][x]) {
92 occupied_by_arrows[y][x] = true;
93 } while (x != to_col || y != to_row);
98 var point_from_start = function(x1, y1, x2, y2, t, u) {
102 var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
106 var x = x1 + dx * t + dy * u;
107 var y = y1 + dy * t - dx * u;
111 var point_from_end = function(x1, y1, x2, y2, t, u) {
115 var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
119 var x = x2 + dx * t + dy * u;
120 var y = y2 + dy * t - dx * u;
124 var position_arrow = function(arrow) {
126 arrow.svg.parentElement.removeChild(arrow.svg);
129 if (current_display_line !== null) {
133 var pos = $(".square-a8").position();
135 var zoom_factor = $("#board").width() / 400.0;
136 var line_width = arrow.line_width * zoom_factor;
137 var arrow_size = arrow.arrow_size * zoom_factor;
139 var square_width = $(".square-a8").width();
140 var from_y = (7 - arrow.from_row + 0.5)*square_width;
141 var to_y = (7 - arrow.to_row + 0.5)*square_width;
142 var from_x = (arrow.from_col + 0.5)*square_width;
143 var to_x = (arrow.to_col + 0.5)*square_width;
145 var SVG_NS = "http://www.w3.org/2000/svg";
146 var XHTML_NS = "http://www.w3.org/1999/xhtml";
147 var svg = document.createElementNS(SVG_NS, "svg");
148 svg.setAttribute("width", $("#board").width());
149 svg.setAttribute("height", $("#board").height());
150 svg.setAttribute("style", "position: absolute");
151 svg.setAttribute("position", "absolute");
152 svg.setAttribute("version", "1.1");
153 svg.setAttribute("class", "c1");
154 svg.setAttribute("xmlns", XHTML_NS);
162 var outline = document.createElementNS(SVG_NS, "path");
163 outline.setAttribute("d", "M " + point_from_start(x1, y1, x2, y2, arrow_size / 2, 0) + " L " + point_from_end(x1, y1, x2, y2, -arrow_size / 2, 0));
164 outline.setAttribute("xmlns", XHTML_NS);
165 outline.setAttribute("stroke", "#666");
166 outline.setAttribute("stroke-width", line_width + 2);
167 outline.setAttribute("fill", "none");
168 svg.appendChild(outline);
170 var path = document.createElementNS(SVG_NS, "path");
171 path.setAttribute("d", "M " + point_from_start(x1, y1, x2, y2, arrow_size / 2, 0) + " L " + point_from_end(x1, y1, x2, y2, -arrow_size / 2, 0));
172 path.setAttribute("xmlns", XHTML_NS);
173 path.setAttribute("stroke", arrow.fg_color);
174 path.setAttribute("stroke-width", line_width);
175 path.setAttribute("fill", "none");
176 svg.appendChild(path);
178 // Then the arrow head.
179 var head = document.createElementNS(SVG_NS, "path");
180 head.setAttribute("d",
181 "M " + point_from_end(x1, y1, x2, y2, 0, 0) +
182 " L " + point_from_end(x1, y1, x2, y2, -arrow_size, -arrow_size / 2) +
183 " L " + point_from_end(x1, y1, x2, y2, -arrow_size * .623, 0.0) +
184 " L " + point_from_end(x1, y1, x2, y2, -arrow_size, arrow_size / 2) +
185 " L " + point_from_end(x1, y1, x2, y2, 0, 0));
186 head.setAttribute("xmlns", XHTML_NS);
187 head.setAttribute("stroke", "#000");
188 head.setAttribute("stroke-width", "1");
189 head.setAttribute("fill", "#f66");
190 svg.appendChild(head);
192 $(svg).css({ top: pos.top, left: pos.left });
193 document.body.appendChild(svg);
197 var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
198 var from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
199 var from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
200 var to_col = to_square.charCodeAt(0) - "a1".charCodeAt(0);
201 var to_row = to_square.charCodeAt(1) - "a1".charCodeAt(1);
209 line_width: line_width,
210 arrow_size: arrow_size,
214 position_arrow(arrow);
218 var compare_by_sort_key = function(refutation_lines, a, b) {
219 var ska = refutation_lines[a]['sort_key'];
220 var skb = refutation_lines[b]['sort_key'];
221 if (ska < skb) return -1;
222 if (ska > skb) return 1;
226 var compare_by_score = function(refutation_lines, a, b) {
227 var sa = parseInt(refutation_lines[b]['score_sort_key'], 10);
228 var sb = parseInt(refutation_lines[a]['score_sort_key'], 10);
232 // Fake multi-PV using the refutation lines. Find all “relevant” moves,
233 // sorted by quality, descending.
234 var find_nonstupid_moves = function(data, margin) {
235 // First of all, if there are any moves that are more than 0.5 ahead of
236 // the primary move, the refutation lines are probably bunk, so just
238 var best_score = undefined;
239 var pv_score = undefined;
240 for (var move in data['refutation_lines']) {
241 var score = parseInt(data['refutation_lines'][move]['score_sort_key'], 10);
242 if (move == data['pv_uci'][0]) {
245 if (best_score === undefined || score > best_score) {
248 if (!(data['refutation_lines'][move]['depth'] >= 8)) {
253 if (best_score - pv_score > 50) {
257 // Now find all moves that are within “margin” of the best score.
258 // The PV move will always be first.
260 for (var move in data['refutation_lines']) {
261 var score = parseInt(data['refutation_lines'][move]['score_sort_key'], 10);
262 if (move != data['pv_uci'][0] && best_score - score <= margin) {
266 moves = moves.sort(function(a, b) { return compare_by_score(data['refutation_lines'], a, b) });
267 moves.unshift(data['pv_uci'][0]);
272 var thousands = function(x) {
273 return String(x).split('').reverse().join('').replace(/(\d{3}\B)/g, '$1,').split('').reverse().join('');
276 var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, opt_limit) {
286 var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + 0 + ");\">" + pretty_pv[0] + "</a>";
287 pv = move_num + '. … ' + move;
292 for ( ; i < pretty_pv.length; ++i) {
293 var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + i + ");\">" + pretty_pv[i] + "</a>";
302 pv += move_num + '. ' + move;
313 var update_highlight = function() {
314 $("#board").find('.square-55d63').removeClass('nonuglyhighlight');
315 if (current_display_line === null && highlight_from !== undefined && highlight_to !== undefined) {
316 $("#board").find('.square-' + highlight_from).addClass('nonuglyhighlight');
317 $("#board").find('.square-' + highlight_to).addClass('nonuglyhighlight');
321 var update_refutation_lines = function(board) {
322 if (display_lines.length > 1) {
323 display_lines = [ display_lines[0] ];
326 var tbl = $("#refutationlines");
330 for (var move in refutation_lines) {
333 var compare = sort_refutation_lines_by_score ? compare_by_score : compare_by_sort_key;
334 moves = moves.sort(function(a, b) { return compare(refutation_lines, a, b) });
335 for (var i = 0; i < moves.length; ++i) {
336 var line = refutation_lines[moves[i]];
338 var tr = document.createElement("tr");
340 var move_td = document.createElement("td");
341 tr.appendChild(move_td);
342 $(move_td).addClass("move");
343 if (line['pv_uci'].length == 0) {
344 $(move_td).text(line['pretty_move']);
346 var move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line['pretty_move'] + "</a>";
347 $(move_td).html(move);
350 var score_td = document.createElement("td");
351 tr.appendChild(score_td);
352 $(score_td).addClass("score");
353 $(score_td).text(line['pretty_score']);
355 var depth_td = document.createElement("td");
356 tr.appendChild(depth_td);
357 $(depth_td).addClass("depth");
358 $(depth_td).text("d" + line['depth']);
360 var pv_td = document.createElement("td");
361 tr.appendChild(pv_td);
362 $(pv_td).addClass("pv");
363 $(pv_td).html(print_pv(fen, line['pv_uci'], line['pv_pretty'], move_num, toplay, 10));
368 // Make one of the links clickable and the other nonclickable.
369 if (sort_refutation_lines_by_score) {
370 $("#sortbyscore0").html("<a href=\"javascript:resort_refutation_lines(0)\">Move</a>");
371 $("#sortbyscore1").html("<strong>Score</strong>");
373 $("#sortbyscore0").html("<strong>Move</strong>");
374 $("#sortbyscore1").html("<a href=\"javascript:resort_refutation_lines(1)\">Score</a>");
378 var update_board = function(board, data, num_viewers) {
382 var headline = 'Analysis';
383 if (data['position']['last_move'] !== 'none') {
384 headline += ' after '
385 if (data['position']['toplay'] == 'W') {
386 headline += (data['position']['move_num']-1) + '… ';
388 headline += data['position']['move_num'] + '. ';
390 headline += data['position']['last_move'];
393 $("#headline").text(headline);
395 if (num_viewers === null) {
396 $("#numviewers").text("");
397 } else if (num_viewers == 1) {
398 $("#numviewers").text("You are the only current viewer");
400 $("#numviewers").text(num_viewers + " current viewers");
404 if (data['score'] !== null) {
405 $("#score").text(data['score']);
409 if (data['nodes'] && data['nps'] && data['depth']) {
410 var stats = thousands(data['nodes']) + ' nodes, ' + thousands(data['nps']) + ' nodes/sec, depth ' + data['depth'] + ' ply';
411 if (data['seldepth']) {
412 stats += ' (' + data['seldepth'] + ' selective)';
414 if (data['tbhits'] && data['tbhits'] > 0) {
415 if (data['tbhits'] == 1) {
416 stats += ', one Nalimov hit';
418 stats += ', ' + data['tbhits'] + ' Nalimov hits';
422 $("#searchstats").text(stats);
425 // Update the board itself.
426 fen = data['position']['fen'];
427 update_displayed_line();
429 if (data['position']['last_move_uci']) {
430 highlight_from = data['position']['last_move_uci'].substr(0, 2);
431 highlight_to = data['position']['last_move_uci'].substr(2, 4);
433 highlight_from = highlight_to = undefined;
438 $("#pv").html(print_pv(data['position']['fen'], data['pv_uci'], data['pv_pretty'], data['position']['move_num'], data['position']['toplay']));
440 // Update the PV arrow.
442 if (data['pv_uci'].length >= 1) {
443 // draw a continuation arrow as long as it's the same piece
444 for (var i = 0; i < data['pv_uci'].length; i += 2) {
445 var from = data['pv_uci'][i].substr(0, 2);
446 var to = data['pv_uci'][i].substr(2,4);
447 if ((i >= 2 && from != data['pv_uci'][i - 2].substr(2, 4)) ||
448 interfering_arrow(from, to)) {
451 create_arrow(from, to, '#f66', 6, 20);
454 var alt_moves = find_nonstupid_moves(data, 30);
455 for (var i = 1; i < alt_moves.length && i < 3; ++i) {
456 create_arrow(alt_moves[i].substr(0, 2),
457 alt_moves[i].substr(2, 4), '#f66', 1, 10);
461 // See if all semi-reasonable moves have only one possible response.
462 if (data['pv_uci'].length >= 2) {
463 var nonstupid_moves = find_nonstupid_moves(data, 300);
464 var response = data['pv_uci'][1];
465 for (var i = 0; i < nonstupid_moves.length; ++i) {
466 if (nonstupid_moves[i] == data['pv_uci'][0]) {
467 // ignore the PV move for refutation lines.
470 if (!data['refutation_lines'] ||
471 !data['refutation_lines'][nonstupid_moves[i]] ||
472 !data['refutation_lines'][nonstupid_moves[i]]['pv_uci'] ||
473 data['refutation_lines'][nonstupid_moves[i]]['pv_uci'].length < 1) {
474 // Incomplete PV, abort.
475 response = undefined;
478 var this_response = data['refutation_lines'][nonstupid_moves[i]]['pv_uci'][1];
479 if (response !== this_response) {
480 // Different response depending on lines, abort.
481 response = undefined;
486 if (nonstupid_moves.length > 0 && response !== undefined) {
487 create_arrow(response.substr(0, 2),
488 response.substr(2, 4), '#66f', 6, 20);
492 // Update the refutation lines.
493 fen = data['position']['fen'];
494 move_num = data['position']['move_num'];
495 toplay = data['position']['toplay'];
496 refutation_lines = data['refutation_lines'];
497 update_refutation_lines(board);
500 setTimeout(function() { request_update(board); }, 100);
503 var resort_refutation_lines = function(sort_by_score) {
504 sort_refutation_lines_by_score = sort_by_score;
505 update_refutation_lines(board);
507 window['resort_refutation_lines'] = resort_refutation_lines;
509 var show_line = function(line_num, move_num) {
510 if (line_num == -1) {
511 current_display_line = null;
512 current_display_move = null;
514 current_display_line = display_lines[line_num];
515 current_display_move = move_num;
517 update_displayed_line();
521 window['show_line'] = show_line;
523 var prev_move = function() {
524 --current_display_move;
525 update_displayed_line();
527 window['prev_move'] = prev_move;
529 var next_move = function() {
530 ++current_display_move;
531 update_displayed_line();
533 window['next_move'] = prev_move;
535 var update_displayed_line = function() {
536 if (current_display_line === null) {
537 $("#linenav").hide();
538 $("#linemsg").show();
543 $("#linenav").show();
544 $("#linemsg").hide();
546 if (current_display_move == 0) {
547 $("#prevmove").html("Previous");
549 $("#prevmove").html("<a href=\"javascript:prev_move();\">Previous</a></span>");
551 if (current_display_move == current_display_line.uci_pv.length - 1) {
552 $("#nextmove").html("Next");
554 $("#nextmove").html("<a href=\"javascript:next_move();\">Next</a></span>");
557 hiddenboard.position(current_display_line.start_fen, false);
558 for (var i = 0; i <= current_display_move; ++i) {
559 var move = current_display_line.uci_pv[i];
560 move = move.substr(0, 2) + "-" + move.substr(2, 4);
561 hiddenboard.move(move, false);
563 board.position(hiddenboard.position());
566 var init = function() {
568 board = new window.ChessBoard('board', 'start');
569 hiddenboard = new window.ChessBoard('hiddenboard', 'start');
571 request_update(board);
572 $(window).resize(function() {
578 $(document).ready(init);