2 var hiddenboard = null;
4 var occupied_by_arrows = [];
5 var refutation_lines = [];
9 var sort_refutation_lines_by_score = 0;
10 var highlight_from = undefined;
11 var highlight_to = undefined;
12 var unique = Math.random();
15 var display_lines = [];
16 var current_display_line = null;
17 var current_display_move = null;
19 var request_update = function(board) {
21 url: "http://analysis.sesse.net/analysis.pl?ims=" + ims + "&unique=" + unique
22 //url: "http://analysis.sesse.net:5000/analysis.pl?ims=" + ims + "&unique=" + unique
23 }).done(function(data, textstatus, xhr) {
24 ims = xhr.getResponseHeader('X-Remoteglot-Last-Modified');
25 var num_viewers = xhr.getResponseHeader('X-Remoteglot-Num-Viewers');
26 update_board(board, data, num_viewers);
28 // Wait ten seconds, then try again.
29 setTimeout(function() { request_update(board); }, 10000);
33 var clear_arrows = function() {
34 for (var i = 0; i < arrows.length; ++i) {
36 arrows[i].svg.parentElement.removeChild(arrows[i].svg);
42 occupied_by_arrows = [];
43 for (var y = 0; y < 8; ++y) {
44 occupied_by_arrows.push([false, false, false, false, false, false, false, false]);
48 var redraw_arrows = function() {
49 for (var i = 0; i < arrows.length; ++i) {
50 position_arrow(arrows[i]);
54 var sign = function(x) {
64 // See if drawing this arrow on the board would cause unduly amount of confusion.
65 var interfering_arrow = function(from, to) {
66 var from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
67 var from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
68 var to_col = to.charCodeAt(0) - "a1".charCodeAt(0);
69 var to_row = to.charCodeAt(1) - "a1".charCodeAt(1);
71 occupied_by_arrows[from_row][from_col] = true;
73 // Knight move: Just check that we haven't been at the destination before.
74 if ((Math.abs(to_col - from_col) == 2 && Math.abs(to_row - from_row) == 1) ||
75 (Math.abs(to_col - from_col) == 1 && Math.abs(to_row - from_row) == 2)) {
76 return occupied_by_arrows[to_row][to_col];
79 // Sliding piece: Check if anything except the from-square is seen before.
80 var dx = sign(to_col - from_col);
81 var dy = sign(to_row - from_row);
87 if (occupied_by_arrows[y][x]) {
90 occupied_by_arrows[y][x] = true;
91 } while (x != to_col || y != to_row);
96 var point_from_start = function(x1, y1, x2, y2, t, u) {
100 var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
104 var x = x1 + dx * t + dy * u;
105 var y = y1 + dy * t - dx * u;
109 var point_from_end = function(x1, y1, x2, y2, t, u) {
113 var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
117 var x = x2 + dx * t + dy * u;
118 var y = y2 + dy * t - dx * u;
122 var position_arrow = function(arrow) {
124 arrow.svg.parentElement.removeChild(arrow.svg);
127 if (current_display_line !== null) {
131 var pos = $(".square-a8").position();
133 var zoom_factor = $("#board").width() / 400.0;
134 var line_width = arrow.line_width * zoom_factor;
135 var arrow_size = arrow.arrow_size * zoom_factor;
137 var square_width = $(".square-a8").width();
138 var from_y = (7 - arrow.from_row + 0.5)*square_width;
139 var to_y = (7 - arrow.to_row + 0.5)*square_width;
140 var from_x = (arrow.from_col + 0.5)*square_width;
141 var to_x = (arrow.to_col + 0.5)*square_width;
143 var SVG_NS = "http://www.w3.org/2000/svg";
144 var XHTML_NS = "http://www.w3.org/1999/xhtml";
145 var svg = document.createElementNS(SVG_NS, "svg");
146 svg.setAttribute("width", $("#board").width());
147 svg.setAttribute("height", $("#board").height());
148 svg.setAttribute("style", "position: absolute");
149 svg.setAttribute("position", "absolute");
150 svg.setAttribute("version", "1.1");
151 svg.setAttribute("class", "c1");
152 svg.setAttribute("xmlns", XHTML_NS);
160 var outline = document.createElementNS(SVG_NS, "path");
161 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));
162 outline.setAttribute("xmlns", XHTML_NS);
163 outline.setAttribute("stroke", "#666");
164 outline.setAttribute("stroke-width", line_width + 2);
165 outline.setAttribute("fill", "none");
166 svg.appendChild(outline);
168 var path = document.createElementNS(SVG_NS, "path");
169 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));
170 path.setAttribute("xmlns", XHTML_NS);
171 path.setAttribute("stroke", arrow.fg_color);
172 path.setAttribute("stroke-width", line_width);
173 path.setAttribute("fill", "none");
174 svg.appendChild(path);
176 // Then the arrow head.
177 var head = document.createElementNS(SVG_NS, "path");
178 head.setAttribute("d",
179 "M " + point_from_end(x1, y1, x2, y2, 0, 0) +
180 " L " + point_from_end(x1, y1, x2, y2, -arrow_size, -arrow_size / 2) +
181 " L " + point_from_end(x1, y1, x2, y2, -arrow_size * .623, 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, 0, 0));
184 head.setAttribute("xmlns", XHTML_NS);
185 head.setAttribute("stroke", "#000");
186 head.setAttribute("stroke-width", "1");
187 head.setAttribute("fill", "#f66");
188 svg.appendChild(head);
190 $(svg).css({ top: pos.top, left: pos.left });
191 document.body.appendChild(svg);
195 var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
196 var from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
197 var from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
198 var to_col = to_square.charCodeAt(0) - "a1".charCodeAt(0);
199 var to_row = to_square.charCodeAt(1) - "a1".charCodeAt(1);
207 line_width: line_width,
208 arrow_size: arrow_size,
212 position_arrow(arrow);
216 var compare_by_sort_key = function(refutation_lines, a, b) {
217 var ska = refutation_lines[a].sort_key;
218 var skb = refutation_lines[b].sort_key;
219 if (ska < skb) return -1;
220 if (ska > skb) return 1;
224 var compare_by_score = function(refutation_lines, a, b) {
225 var sa = parseInt(refutation_lines[b].score_sort_key);
226 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, 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, 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 '
383 if (data.position.toplay == 'W') {
384 headline += (data.position.move_num-1) + '… ';
386 headline += data.position.move_num + '. ';
388 headline += data.position.last_move;
391 $("#headline").text(headline);
393 if (num_viewers === null) {
394 $("#numviewers").text("");
395 } else if (num_viewers == 1) {
396 $("#numviewers").text("You are the only current viewer");
398 $("#numviewers").text(num_viewers + " current viewers");
402 if (data.score !== null) {
403 $("#score").text(data.score);
407 if (data.nodes && data.nps && data.depth) {
408 var stats = thousands(data.nodes) + ' nodes, ' + thousands(data.nps) + ' nodes/sec, depth ' + data.depth + ' ply';
410 stats += ' (' + data.seldepth + ' selective)';
412 if (data.tbhits && data.tbhits > 0) {
413 if (data.tbhits == 1) {
414 stats += ', one Nalimov hit';
416 stats += ', ' + data.tbhits + ' Nalimov hits';
420 $("#searchstats").text(stats);
423 // Update the board itself.
424 fen = data.position.fen;
425 update_displayed_line();
427 if (data.position.last_move_uci) {
428 highlight_from = data.position.last_move_uci.substr(0, 2);
429 highlight_to = data.position.last_move_uci.substr(2, 4);
431 highlight_from = highlight_to = undefined;
436 $("#pv").html(print_pv(data.position.fen, data.pv_uci, data.pv_pretty, data.position.move_num, data.position.toplay));
438 // Update the PV arrow.
440 if (data.pv_uci.length >= 1) {
441 // draw a continuation arrow as long as it's the same piece
442 for (var i = 0; i < data.pv_uci.length; i += 2) {
443 var from = data.pv_uci[i].substr(0, 2);
444 var to = data.pv_uci[i].substr(2,4);
445 if ((i >= 2 && from != data.pv_uci[i - 2].substr(2, 4)) ||
446 interfering_arrow(from, to)) {
449 create_arrow(from, to, '#f66', 6, 20);
452 var alt_moves = find_nonstupid_moves(data, 30);
453 for (var i = 1; i < alt_moves.length && i < 3; ++i) {
454 create_arrow(alt_moves[i].substr(0, 2),
455 alt_moves[i].substr(2, 4), '#f66', 1, 10);
459 // See if all semi-reasonable moves have only one possible response.
460 if (data.pv_uci.length >= 2) {
461 var nonstupid_moves = find_nonstupid_moves(data, 300);
462 var response = data.pv_uci[1];
463 for (var i = 0; i < nonstupid_moves.length; ++i) {
464 if (nonstupid_moves[i] == data.pv_uci[0]) {
465 // ignore the PV move for refutation lines.
468 if (!data.refutation_lines ||
469 !data.refutation_lines[nonstupid_moves[i]] ||
470 !data.refutation_lines[nonstupid_moves[i]].pv_uci ||
471 data.refutation_lines[nonstupid_moves[i]].pv_uci.length < 1) {
472 // Incomplete PV, abort.
473 response = undefined;
476 var this_response = data.refutation_lines[nonstupid_moves[i]].pv_uci[1];
477 if (response !== this_response) {
478 // Different response depending on lines, abort.
479 response = undefined;
484 if (nonstupid_moves.length > 0 && response !== undefined) {
485 create_arrow(response.substr(0, 2),
486 response.substr(2, 4), '#66f', 6, 20);
490 // Update the refutation lines.
491 fen = data.position.fen;
492 move_num = data.position.move_num;
493 toplay = data.position.toplay;
494 refutation_lines = data.refutation_lines;
495 update_refutation_lines(board);
498 setTimeout(function() { request_update(board); }, 100);
501 var resort_refutation_lines = function(sort_by_score) {
502 sort_refutation_lines_by_score = sort_by_score;
503 update_refutation_lines(board);
506 var show_line = function(line_num, move_num) {
507 if (line_num == -1) {
508 current_display_line = null;
509 current_display_move = null;
511 current_display_line = display_lines[line_num];
512 current_display_move = move_num;
514 update_displayed_line();
519 var prev_move = function() {
520 --current_display_move;
521 update_displayed_line();
524 var next_move = function() {
525 ++current_display_move;
526 update_displayed_line();
529 var update_displayed_line = function() {
530 if (current_display_line === null) {
531 $("#linenav").hide();
532 $("#linemsg").show();
537 $("#linenav").show();
538 $("#linemsg").hide();
540 if (current_display_move == 0) {
541 $("#prevmove").html("Previous");
543 $("#prevmove").html("<a href=\"javascript:prev_move();\">Previous</a></span>");
545 if (current_display_move == current_display_line.uci_pv.length - 1) {
546 $("#nextmove").html("Next");
548 $("#nextmove").html("<a href=\"javascript:next_move();\">Next</a></span>");
551 hiddenboard.position(current_display_line.start_fen, false);
552 for (var i = 0; i <= current_display_move; ++i) {
553 var move = current_display_line.uci_pv[i];
554 move = move.substr(0, 2) + "-" + move.substr(2, 4);
555 hiddenboard.move(move, false);
557 board.position(hiddenboard.position());
560 var init = function() {
562 board = new ChessBoard('board', 'start');
563 hiddenboard = new ChessBoard('hiddenboard', 'start');
565 request_update(board);
566 $(window).resize(function() {
572 $(document).ready(init);