@chessle/chess.js-extended
Version:
A powerful browser-only chess engine package that bundles Stockfish for position evaluation and analysis on top of chess.js
2,055 lines (2,053 loc) • 2.78 MB
JavaScript
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __commonJS = (cb, mod) => function __require() {
return mod || (0, cb[__getOwnPropNames(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;
};
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
if (from && typeof from === "object" || typeof from === "function") {
for (let key of __getOwnPropNames(from))
if (!__hasOwnProp.call(to, key) && key !== except)
__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
}
return to;
};
var __reExport = (target, mod, secondTarget) => (__copyProps(target, mod, "default"), secondTarget && __copyProps(secondTarget, mod, "default"));
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
// If the importer is in node compatibility mode or this is not an ESM
// file that has been converted to a CommonJS file using a Babel-
// compatible transform (i.e. "__esModule" has not been set), then set
// "default" to the CommonJS "module.exports" for node compatibility.
isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
mod
));
// ../../node_modules/.pnpm/chess.js@1.4.0/node_modules/chess.js/dist/cjs/chess.js
var require_chess = __commonJS({
"../../node_modules/.pnpm/chess.js@1.4.0/node_modules/chess.js/dist/cjs/chess.js"(exports) {
"use strict";
function rootNode(comment) {
return comment !== null ? { comment, variations: [] } : { variations: [] };
}
function node(move, suffix, nag, comment, variations) {
const node2 = { move, variations };
if (suffix) {
node2.suffix = suffix;
}
if (nag) {
node2.nag = nag;
}
if (comment !== null) {
node2.comment = comment;
}
return node2;
}
function lineToTree(...nodes) {
const [root, ...rest] = nodes;
let parent = root;
for (const child of rest) {
if (child !== null) {
parent.variations = [child, ...child.variations];
child.variations = [];
parent = child;
}
}
return root;
}
function pgn(headers, game) {
if (game.marker && game.marker.comment) {
let node2 = game.root;
while (true) {
const next = node2.variations[0];
if (!next) {
node2.comment = game.marker.comment;
break;
}
node2 = next;
}
}
return {
headers,
root: game.root,
result: (game.marker && game.marker.result) ?? void 0
};
}
function peg$subclass(child, parent) {
function C() {
this.constructor = child;
}
C.prototype = parent.prototype;
child.prototype = new C();
}
function peg$SyntaxError(message, expected, found, location) {
var self = Error.call(this, message);
if (Object.setPrototypeOf) {
Object.setPrototypeOf(self, peg$SyntaxError.prototype);
}
self.expected = expected;
self.found = found;
self.location = location;
self.name = "SyntaxError";
return self;
}
peg$subclass(peg$SyntaxError, Error);
function peg$padEnd(str, targetLength, padString) {
padString = padString || " ";
if (str.length > targetLength) {
return str;
}
targetLength -= str.length;
padString += padString.repeat(targetLength);
return str + padString.slice(0, targetLength);
}
peg$SyntaxError.prototype.format = function(sources) {
var str = "Error: " + this.message;
if (this.location) {
var src = null;
var k;
for (k = 0; k < sources.length; k++) {
if (sources[k].source === this.location.source) {
src = sources[k].text.split(/\r\n|\n|\r/g);
break;
}
}
var s = this.location.start;
var offset_s = this.location.source && typeof this.location.source.offset === "function" ? this.location.source.offset(s) : s;
var loc = this.location.source + ":" + offset_s.line + ":" + offset_s.column;
if (src) {
var e = this.location.end;
var filler = peg$padEnd("", offset_s.line.toString().length, " ");
var line = src[s.line - 1];
var last = s.line === e.line ? e.column : line.length + 1;
var hatLen = last - s.column || 1;
str += "\n --> " + loc + "\n" + filler + " |\n" + offset_s.line + " | " + line + "\n" + filler + " | " + peg$padEnd("", s.column - 1, " ") + peg$padEnd("", hatLen, "^");
} else {
str += "\n at " + loc;
}
}
return str;
};
peg$SyntaxError.buildMessage = function(expected, found) {
var DESCRIBE_EXPECTATION_FNS = {
literal: function(expectation) {
return '"' + literalEscape(expectation.text) + '"';
},
class: function(expectation) {
var escapedParts = expectation.parts.map(function(part) {
return Array.isArray(part) ? classEscape(part[0]) + "-" + classEscape(part[1]) : classEscape(part);
});
return "[" + (expectation.inverted ? "^" : "") + escapedParts.join("") + "]";
},
any: function() {
return "any character";
},
end: function() {
return "end of input";
},
other: function(expectation) {
return expectation.description;
}
};
function hex(ch) {
return ch.charCodeAt(0).toString(16).toUpperCase();
}
function literalEscape(s) {
return s.replace(/\\/g, "\\\\").replace(/"/g, '\\"').replace(/\0/g, "\\0").replace(/\t/g, "\\t").replace(/\n/g, "\\n").replace(/\r/g, "\\r").replace(/[\x00-\x0F]/g, function(ch) {
return "\\x0" + hex(ch);
}).replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) {
return "\\x" + hex(ch);
});
}
function classEscape(s) {
return s.replace(/\\/g, "\\\\").replace(/\]/g, "\\]").replace(/\^/g, "\\^").replace(/-/g, "\\-").replace(/\0/g, "\\0").replace(/\t/g, "\\t").replace(/\n/g, "\\n").replace(/\r/g, "\\r").replace(/[\x00-\x0F]/g, function(ch) {
return "\\x0" + hex(ch);
}).replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) {
return "\\x" + hex(ch);
});
}
function describeExpectation(expectation) {
return DESCRIBE_EXPECTATION_FNS[expectation.type](expectation);
}
function describeExpected(expected2) {
var descriptions = expected2.map(describeExpectation);
var i, j;
descriptions.sort();
if (descriptions.length > 0) {
for (i = 1, j = 1; i < descriptions.length; i++) {
if (descriptions[i - 1] !== descriptions[i]) {
descriptions[j] = descriptions[i];
j++;
}
}
descriptions.length = j;
}
switch (descriptions.length) {
case 1:
return descriptions[0];
case 2:
return descriptions[0] + " or " + descriptions[1];
default:
return descriptions.slice(0, -1).join(", ") + ", or " + descriptions[descriptions.length - 1];
}
}
function describeFound(found2) {
return found2 ? '"' + literalEscape(found2) + '"' : "end of input";
}
return "Expected " + describeExpected(expected) + " but " + describeFound(found) + " found.";
};
function peg$parse(input, options) {
options = options !== void 0 ? options : {};
var peg$FAILED = {};
var peg$source = options.grammarSource;
var peg$startRuleFunctions = { pgn: peg$parsepgn };
var peg$startRuleFunction = peg$parsepgn;
var peg$c0 = "[";
var peg$c1 = '"';
var peg$c2 = "]";
var peg$c3 = ".";
var peg$c4 = "O-O-O";
var peg$c5 = "O-O";
var peg$c6 = "0-0-0";
var peg$c7 = "0-0";
var peg$c8 = "$";
var peg$c9 = "{";
var peg$c10 = "}";
var peg$c11 = ";";
var peg$c12 = "(";
var peg$c13 = ")";
var peg$c14 = "1-0";
var peg$c15 = "0-1";
var peg$c16 = "1/2-1/2";
var peg$c17 = "*";
var peg$r0 = /^[a-zA-Z]/;
var peg$r1 = /^[^"]/;
var peg$r2 = /^[0-9]/;
var peg$r3 = /^[.]/;
var peg$r4 = /^[a-zA-Z1-8\-=]/;
var peg$r5 = /^[+#]/;
var peg$r6 = /^[!?]/;
var peg$r7 = /^[^}]/;
var peg$r8 = /^[^\r\n]/;
var peg$r9 = /^[ \t\r\n]/;
var peg$e0 = peg$otherExpectation("tag pair");
var peg$e1 = peg$literalExpectation("[", false);
var peg$e2 = peg$literalExpectation('"', false);
var peg$e3 = peg$literalExpectation("]", false);
var peg$e4 = peg$otherExpectation("tag name");
var peg$e5 = peg$classExpectation([["a", "z"], ["A", "Z"]], false, false);
var peg$e6 = peg$otherExpectation("tag value");
var peg$e7 = peg$classExpectation(['"'], true, false);
var peg$e8 = peg$otherExpectation("move number");
var peg$e9 = peg$classExpectation([["0", "9"]], false, false);
var peg$e10 = peg$literalExpectation(".", false);
var peg$e11 = peg$classExpectation(["."], false, false);
var peg$e12 = peg$otherExpectation("standard algebraic notation");
var peg$e13 = peg$literalExpectation("O-O-O", false);
var peg$e14 = peg$literalExpectation("O-O", false);
var peg$e15 = peg$literalExpectation("0-0-0", false);
var peg$e16 = peg$literalExpectation("0-0", false);
var peg$e17 = peg$classExpectation([["a", "z"], ["A", "Z"], ["1", "8"], "-", "="], false, false);
var peg$e18 = peg$classExpectation(["+", "#"], false, false);
var peg$e19 = peg$otherExpectation("suffix annotation");
var peg$e20 = peg$classExpectation(["!", "?"], false, false);
var peg$e21 = peg$otherExpectation("NAG");
var peg$e22 = peg$literalExpectation("$", false);
var peg$e23 = peg$otherExpectation("brace comment");
var peg$e24 = peg$literalExpectation("{", false);
var peg$e25 = peg$classExpectation(["}"], true, false);
var peg$e26 = peg$literalExpectation("}", false);
var peg$e27 = peg$otherExpectation("rest of line comment");
var peg$e28 = peg$literalExpectation(";", false);
var peg$e29 = peg$classExpectation(["\r", "\n"], true, false);
var peg$e30 = peg$otherExpectation("variation");
var peg$e31 = peg$literalExpectation("(", false);
var peg$e32 = peg$literalExpectation(")", false);
var peg$e33 = peg$otherExpectation("game termination marker");
var peg$e34 = peg$literalExpectation("1-0", false);
var peg$e35 = peg$literalExpectation("0-1", false);
var peg$e36 = peg$literalExpectation("1/2-1/2", false);
var peg$e37 = peg$literalExpectation("*", false);
var peg$e38 = peg$otherExpectation("whitespace");
var peg$e39 = peg$classExpectation([" ", " ", "\r", "\n"], false, false);
var peg$f0 = function(headers, game) {
return pgn(headers, game);
};
var peg$f1 = function(tagPairs) {
return Object.fromEntries(tagPairs);
};
var peg$f2 = function(tagName, tagValue) {
return [tagName, tagValue];
};
var peg$f3 = function(root, marker) {
return { root, marker };
};
var peg$f4 = function(comment, moves) {
return lineToTree(rootNode(comment), ...moves.flat());
};
var peg$f5 = function(san, suffix, nag, comment, variations) {
return node(san, suffix, nag, comment, variations);
};
var peg$f6 = function(nag) {
return nag;
};
var peg$f7 = function(comment) {
return comment.replace(/[\r\n]+/g, " ");
};
var peg$f8 = function(comment) {
return comment.trim();
};
var peg$f9 = function(line) {
return line;
};
var peg$f10 = function(result, comment) {
return { result, comment };
};
var peg$currPos = options.peg$currPos | 0;
var peg$posDetailsCache = [{ line: 1, column: 1 }];
var peg$maxFailPos = peg$currPos;
var peg$maxFailExpected = options.peg$maxFailExpected || [];
var peg$silentFails = options.peg$silentFails | 0;
var peg$result;
if (options.startRule) {
if (!(options.startRule in peg$startRuleFunctions)) {
throw new Error(`Can't start parsing from rule "` + options.startRule + '".');
}
peg$startRuleFunction = peg$startRuleFunctions[options.startRule];
}
function peg$literalExpectation(text, ignoreCase) {
return { type: "literal", text, ignoreCase };
}
function peg$classExpectation(parts, inverted, ignoreCase) {
return { type: "class", parts, inverted, ignoreCase };
}
function peg$endExpectation() {
return { type: "end" };
}
function peg$otherExpectation(description) {
return { type: "other", description };
}
function peg$computePosDetails(pos) {
var details = peg$posDetailsCache[pos];
var p;
if (details) {
return details;
} else {
if (pos >= peg$posDetailsCache.length) {
p = peg$posDetailsCache.length - 1;
} else {
p = pos;
while (!peg$posDetailsCache[--p]) {
}
}
details = peg$posDetailsCache[p];
details = {
line: details.line,
column: details.column
};
while (p < pos) {
if (input.charCodeAt(p) === 10) {
details.line++;
details.column = 1;
} else {
details.column++;
}
p++;
}
peg$posDetailsCache[pos] = details;
return details;
}
}
function peg$computeLocation(startPos, endPos, offset) {
var startPosDetails = peg$computePosDetails(startPos);
var endPosDetails = peg$computePosDetails(endPos);
var res = {
source: peg$source,
start: {
offset: startPos,
line: startPosDetails.line,
column: startPosDetails.column
},
end: {
offset: endPos,
line: endPosDetails.line,
column: endPosDetails.column
}
};
return res;
}
function peg$fail(expected) {
if (peg$currPos < peg$maxFailPos) {
return;
}
if (peg$currPos > peg$maxFailPos) {
peg$maxFailPos = peg$currPos;
peg$maxFailExpected = [];
}
peg$maxFailExpected.push(expected);
}
function peg$buildStructuredError(expected, found, location) {
return new peg$SyntaxError(
peg$SyntaxError.buildMessage(expected, found),
expected,
found,
location
);
}
function peg$parsepgn() {
var s0, s1, s2;
s0 = peg$currPos;
s1 = peg$parsetagPairSection();
s2 = peg$parsemoveTextSection();
s0 = peg$f0(s1, s2);
return s0;
}
function peg$parsetagPairSection() {
var s0, s1, s2;
s0 = peg$currPos;
s1 = [];
s2 = peg$parsetagPair();
while (s2 !== peg$FAILED) {
s1.push(s2);
s2 = peg$parsetagPair();
}
s2 = peg$parse_();
s0 = peg$f1(s1);
return s0;
}
function peg$parsetagPair() {
var s0, s2, s4, s6, s7, s8, s10;
peg$silentFails++;
s0 = peg$currPos;
peg$parse_();
if (input.charCodeAt(peg$currPos) === 91) {
s2 = peg$c0;
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e1);
}
}
if (s2 !== peg$FAILED) {
peg$parse_();
s4 = peg$parsetagName();
if (s4 !== peg$FAILED) {
peg$parse_();
if (input.charCodeAt(peg$currPos) === 34) {
s6 = peg$c1;
peg$currPos++;
} else {
s6 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e2);
}
}
if (s6 !== peg$FAILED) {
s7 = peg$parsetagValue();
if (input.charCodeAt(peg$currPos) === 34) {
s8 = peg$c1;
peg$currPos++;
} else {
s8 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e2);
}
}
if (s8 !== peg$FAILED) {
peg$parse_();
if (input.charCodeAt(peg$currPos) === 93) {
s10 = peg$c2;
peg$currPos++;
} else {
s10 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e3);
}
}
if (s10 !== peg$FAILED) {
s0 = peg$f2(s4, s7);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
if (peg$silentFails === 0) {
peg$fail(peg$e0);
}
}
return s0;
}
function peg$parsetagName() {
var s0, s1, s2;
peg$silentFails++;
s0 = peg$currPos;
s1 = [];
s2 = input.charAt(peg$currPos);
if (peg$r0.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e5);
}
}
if (s2 !== peg$FAILED) {
while (s2 !== peg$FAILED) {
s1.push(s2);
s2 = input.charAt(peg$currPos);
if (peg$r0.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e5);
}
}
}
} else {
s1 = peg$FAILED;
}
if (s1 !== peg$FAILED) {
s0 = input.substring(s0, peg$currPos);
} else {
s0 = s1;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e4);
}
}
return s0;
}
function peg$parsetagValue() {
var s0, s1, s2;
peg$silentFails++;
s0 = peg$currPos;
s1 = [];
s2 = input.charAt(peg$currPos);
if (peg$r1.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e7);
}
}
while (s2 !== peg$FAILED) {
s1.push(s2);
s2 = input.charAt(peg$currPos);
if (peg$r1.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e7);
}
}
}
s0 = input.substring(s0, peg$currPos);
peg$silentFails--;
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e6);
}
return s0;
}
function peg$parsemoveTextSection() {
var s0, s1, s3;
s0 = peg$currPos;
s1 = peg$parseline();
peg$parse_();
s3 = peg$parsegameTerminationMarker();
if (s3 === peg$FAILED) {
s3 = null;
}
peg$parse_();
s0 = peg$f3(s1, s3);
return s0;
}
function peg$parseline() {
var s0, s1, s2, s3;
s0 = peg$currPos;
s1 = peg$parsecomment();
if (s1 === peg$FAILED) {
s1 = null;
}
s2 = [];
s3 = peg$parsemove();
while (s3 !== peg$FAILED) {
s2.push(s3);
s3 = peg$parsemove();
}
s0 = peg$f4(s1, s2);
return s0;
}
function peg$parsemove() {
var s0, s4, s5, s6, s7, s8, s9, s10;
s0 = peg$currPos;
peg$parse_();
peg$parsemoveNumber();
peg$parse_();
s4 = peg$parsesan();
if (s4 !== peg$FAILED) {
s5 = peg$parsesuffixAnnotation();
if (s5 === peg$FAILED) {
s5 = null;
}
s6 = [];
s7 = peg$parsenag();
while (s7 !== peg$FAILED) {
s6.push(s7);
s7 = peg$parsenag();
}
s7 = peg$parse_();
s8 = peg$parsecomment();
if (s8 === peg$FAILED) {
s8 = null;
}
s9 = [];
s10 = peg$parsevariation();
while (s10 !== peg$FAILED) {
s9.push(s10);
s10 = peg$parsevariation();
}
s0 = peg$f5(s4, s5, s6, s8, s9);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
return s0;
}
function peg$parsemoveNumber() {
var s0, s1, s2, s3, s4, s5;
peg$silentFails++;
s0 = peg$currPos;
s1 = [];
s2 = input.charAt(peg$currPos);
if (peg$r2.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e9);
}
}
while (s2 !== peg$FAILED) {
s1.push(s2);
s2 = input.charAt(peg$currPos);
if (peg$r2.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e9);
}
}
}
if (input.charCodeAt(peg$currPos) === 46) {
s2 = peg$c3;
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e10);
}
}
if (s2 !== peg$FAILED) {
s3 = peg$parse_();
s4 = [];
s5 = input.charAt(peg$currPos);
if (peg$r3.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e11);
}
}
while (s5 !== peg$FAILED) {
s4.push(s5);
s5 = input.charAt(peg$currPos);
if (peg$r3.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e11);
}
}
}
s1 = [s1, s2, s3, s4];
s0 = s1;
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e8);
}
}
return s0;
}
function peg$parsesan() {
var s0, s1, s2, s3, s4, s5;
peg$silentFails++;
s0 = peg$currPos;
s1 = peg$currPos;
if (input.substr(peg$currPos, 5) === peg$c4) {
s2 = peg$c4;
peg$currPos += 5;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e13);
}
}
if (s2 === peg$FAILED) {
if (input.substr(peg$currPos, 3) === peg$c5) {
s2 = peg$c5;
peg$currPos += 3;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e14);
}
}
if (s2 === peg$FAILED) {
if (input.substr(peg$currPos, 5) === peg$c6) {
s2 = peg$c6;
peg$currPos += 5;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e15);
}
}
if (s2 === peg$FAILED) {
if (input.substr(peg$currPos, 3) === peg$c7) {
s2 = peg$c7;
peg$currPos += 3;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e16);
}
}
if (s2 === peg$FAILED) {
s2 = peg$currPos;
s3 = input.charAt(peg$currPos);
if (peg$r0.test(s3)) {
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e5);
}
}
if (s3 !== peg$FAILED) {
s4 = [];
s5 = input.charAt(peg$currPos);
if (peg$r4.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e17);
}
}
if (s5 !== peg$FAILED) {
while (s5 !== peg$FAILED) {
s4.push(s5);
s5 = input.charAt(peg$currPos);
if (peg$r4.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e17);
}
}
}
} else {
s4 = peg$FAILED;
}
if (s4 !== peg$FAILED) {
s3 = [s3, s4];
s2 = s3;
} else {
peg$currPos = s2;
s2 = peg$FAILED;
}
} else {
peg$currPos = s2;
s2 = peg$FAILED;
}
}
}
}
}
if (s2 !== peg$FAILED) {
s3 = input.charAt(peg$currPos);
if (peg$r5.test(s3)) {
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e18);
}
}
if (s3 === peg$FAILED) {
s3 = null;
}
s2 = [s2, s3];
s1 = s2;
} else {
peg$currPos = s1;
s1 = peg$FAILED;
}
if (s1 !== peg$FAILED) {
s0 = input.substring(s0, peg$currPos);
} else {
s0 = s1;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e12);
}
}
return s0;
}
function peg$parsesuffixAnnotation() {
var s0, s1, s2;
peg$silentFails++;
s0 = peg$currPos;
s1 = [];
s2 = input.charAt(peg$currPos);
if (peg$r6.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e20);
}
}
while (s2 !== peg$FAILED) {
s1.push(s2);
if (s1.length >= 2) {
s2 = peg$FAILED;
} else {
s2 = input.charAt(peg$currPos);
if (peg$r6.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e20);
}
}
}
}
if (s1.length < 1) {
peg$currPos = s0;
s0 = peg$FAILED;
} else {
s0 = s1;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e19);
}
}
return s0;
}
function peg$parsenag() {
var s0, s2, s3, s4, s5;
peg$silentFails++;
s0 = peg$currPos;
peg$parse_();
if (input.charCodeAt(peg$currPos) === 36) {
s2 = peg$c8;
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e22);
}
}
if (s2 !== peg$FAILED) {
s3 = peg$currPos;
s4 = [];
s5 = input.charAt(peg$currPos);
if (peg$r2.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e9);
}
}
if (s5 !== peg$FAILED) {
while (s5 !== peg$FAILED) {
s4.push(s5);
s5 = input.charAt(peg$currPos);
if (peg$r2.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e9);
}
}
}
} else {
s4 = peg$FAILED;
}
if (s4 !== peg$FAILED) {
s3 = input.substring(s3, peg$currPos);
} else {
s3 = s4;
}
if (s3 !== peg$FAILED) {
s0 = peg$f6(s3);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
if (peg$silentFails === 0) {
peg$fail(peg$e21);
}
}
return s0;
}
function peg$parsecomment() {
var s0;
s0 = peg$parsebraceComment();
if (s0 === peg$FAILED) {
s0 = peg$parserestOfLineComment();
}
return s0;
}
function peg$parsebraceComment() {
var s0, s1, s2, s3, s4;
peg$silentFails++;
s0 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 123) {
s1 = peg$c9;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e24);
}
}
if (s1 !== peg$FAILED) {
s2 = peg$currPos;
s3 = [];
s4 = input.charAt(peg$currPos);
if (peg$r7.test(s4)) {
peg$currPos++;
} else {
s4 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e25);
}
}
while (s4 !== peg$FAILED) {
s3.push(s4);
s4 = input.charAt(peg$currPos);
if (peg$r7.test(s4)) {
peg$currPos++;
} else {
s4 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e25);
}
}
}
s2 = input.substring(s2, peg$currPos);
if (input.charCodeAt(peg$currPos) === 125) {
s3 = peg$c10;
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e26);
}
}
if (s3 !== peg$FAILED) {
s0 = peg$f7(s2);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e23);
}
}
return s0;
}
function peg$parserestOfLineComment() {
var s0, s1, s2, s3, s4;
peg$silentFails++;
s0 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 59) {
s1 = peg$c11;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e28);
}
}
if (s1 !== peg$FAILED) {
s2 = peg$currPos;
s3 = [];
s4 = input.charAt(peg$currPos);
if (peg$r8.test(s4)) {
peg$currPos++;
} else {
s4 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e29);
}
}
while (s4 !== peg$FAILED) {
s3.push(s4);
s4 = input.charAt(peg$currPos);
if (peg$r8.test(s4)) {
peg$currPos++;
} else {
s4 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e29);
}
}
}
s2 = input.substring(s2, peg$currPos);
s0 = peg$f8(s2);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e27);
}
}
return s0;
}
function peg$parsevariation() {
var s0, s2, s3, s5;
peg$silentFails++;
s0 = peg$currPos;
peg$parse_();
if (input.charCodeAt(peg$currPos) === 40) {
s2 = peg$c12;
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e31);
}
}
if (s2 !== peg$FAILED) {
s3 = peg$parseline();
if (s3 !== peg$FAILED) {
peg$parse_();
if (input.charCodeAt(peg$currPos) === 41) {
s5 = peg$c13;
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e32);
}
}
if (s5 !== peg$FAILED) {
s0 = peg$f9(s3);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
if (peg$silentFails === 0) {
peg$fail(peg$e30);
}
}
return s0;
}
function peg$parsegameTerminationMarker() {
var s0, s1, s3;
peg$silentFails++;
s0 = peg$currPos;
if (input.substr(peg$currPos, 3) === peg$c14) {
s1 = peg$c14;
peg$currPos += 3;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e34);
}
}
if (s1 === peg$FAILED) {
if (input.substr(peg$currPos, 3) === peg$c15) {
s1 = peg$c15;
peg$currPos += 3;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e35);
}
}
if (s1 === peg$FAILED) {
if (input.substr(peg$currPos, 7) === peg$c16) {
s1 = peg$c16;
peg$currPos += 7;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e36);
}
}
if (s1 === peg$FAILED) {
if (input.charCodeAt(peg$currPos) === 42) {
s1 = peg$c17;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e37);
}
}
}
}
}
if (s1 !== peg$FAILED) {
peg$parse_();
s3 = peg$parsecomment();
if (s3 === peg$FAILED) {
s3 = null;
}
s0 = peg$f10(s1, s3);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e33);
}
}
return s0;
}
function peg$parse_() {
var s0, s1;
peg$silentFails++;
s0 = [];
s1 = input.charAt(peg$currPos);
if (peg$r9.test(s1)) {
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e39);
}
}
while (s1 !== peg$FAILED) {
s0.push(s1);
s1 = input.charAt(peg$currPos);
if (peg$r9.test(s1)) {
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e39);
}
}
}
peg$silentFails--;
s1 = peg$FAILED;
if (peg$silentFails === 0) {
peg$fail(peg$e38);
}
return s0;
}
peg$result = peg$startRuleFunction();
if (options.peg$library) {
return (
/** @type {any} */
{
peg$result,
peg$currPos,
peg$FAILED,
peg$maxFailExpected,
peg$maxFailPos
}
);
}
if (peg$result !== peg$FAILED && peg$currPos === input.length) {
return peg$result;
} else {
if (peg$result !== peg$FAILED && peg$currPos < input.length) {
peg$fail(peg$endExpectation());
}
throw peg$buildStructuredError(
peg$maxFailExpected,
peg$maxFailPos < input.length ? input.charAt(peg$maxFailPos) : null,
peg$maxFailPos < input.length ? peg$computeLocation(peg$maxFailPos, peg$maxFailPos + 1) : peg$computeLocation(peg$maxFailPos, peg$maxFailPos)
);
}
}
var MASK64 = 0xffffffffffffffffn;
function rotl(x, k) {
return (x << k | x >> 64n - k) & 0xffffffffffffffffn;
}
function wrappingMul(x, y) {
return x * y & MASK64;
}
function xoroshiro128(state) {
return function() {
let s0 = BigInt(state & MASK64);
let s1 = BigInt(state >> 64n & MASK64);
const result = wrappingMul(rotl(wrappingMul(s0, 5n), 7n), 9n);
s1 ^= s0;
s0 = (rotl(s0, 24n) ^ s1 ^ s1 << 16n) & MASK64;
s1 = rotl(s1, 37n);
state = s1 << 64n | s0;
return result;
};
}
var rand = xoroshiro128(0xa187eb39cdcaed8f31c4b365b102e01en);
var PIECE_KEYS = Array.from({ length: 2 }, () => Array.from({ length: 6 }, () => Array.from({ length: 128 }, () => rand())));
var EP_KEYS = Array.from({ length: 8 }, () => rand());
var CASTLING_KEYS = Array.from({ length: 16 }, () => rand());
var SIDE_KEY = rand();
var WHITE = "w";
var BLACK = "b";
var PAWN = "p";
var KNIGHT = "n";
var BISHOP = "b";
var ROOK = "r";
var QUEEN = "q";
var KING = "k";
var DEFAULT_POSITION = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
var Move = class {
color;
from;
to;
piece;
captured;
promotion;
/**
* @deprecated This field is deprecated and will be removed in version 2.0.0.
* Please use move descriptor functions instead: `isCapture`, `isPromotion`,
* `isEnPassant`, `isKingsideCastle`, `isQueensideCastle`, `isCastle`, and
* `isBigPawn`
*/
flags;
san;
lan;
before;
after;
constructor(chess, internal) {
const { color, piece, from, to, flags, captured, promotion } = internal;
const fromAlgebraic = algebraic(from);
const toAlgebraic = algebraic(to);
this.color = color;
this.piece = piece;
this.from = fromAlgebraic;
this.to = toAlgebraic;
this.san = chess["_moveToSan"](internal, chess["_moves"]({ legal: true }));
this.lan = fromAlgebraic + toAlgebraic;
this.before = chess.fen();
chess["_makeMove"](internal);
this.after = chess.fen();
chess["_undoMove"]();
this.flags = "";
for (const flag in BITS) {
if (BITS[flag] & flags) {
this.flags += FLAGS[flag];
}
}
if (captured) {
this.captured = captured;
}
if (promotion) {
this.promotion = promotion;
this.lan += promotion;
}
}
isCapture() {
return this.flags.indexOf(FLAGS["CAPTURE"]) > -1;
}
isPromotion() {
return this.flags.indexOf(FLAGS["PROMOTION"]) > -1;
}
isEnPassant() {
return this.flags.indexOf(FLAGS["EP_CAPTURE"]) > -1;
}
isKingsideCastle() {
return this.flags.indexOf(FLAGS["KSIDE_CASTLE"]) > -1;
}
isQueensideCastle() {
return this.flags.indexOf(FLAGS["QSIDE_CASTLE"]) > -1;
}
isBigPawn() {
return this.flags.indexOf(FLAGS["BIG_PAWN"]) > -1;
}
};
var EMPTY = -1;
var FLAGS = {
NORMAL: "n",
CAPTURE: "c",
BIG_PAWN: "b",
EP_CAPTURE: "e",
PROMOTION: "p",
KSIDE_CASTLE: "k",
QSIDE_CASTLE: "q",
NULL_MOVE: "-"
};
var SQUARES = [
"a8",
"b8",
"c8",
"d8",
"e8",
"f8",
"g8",
"h8",
"a7",
"b7",
"c7",
"d7",
"e7",
"f7",
"g7",
"h7",
"a6",
"b6",
"c6",
"d6",
"e6",
"f6",
"g6",
"h6",
"a5",
"b5",
"c5",
"d5",
"e5",
"f5",
"g5",
"h5",
"a4",
"b4",
"c4",
"d4",
"e4",
"f4",
"g4",
"h4",
"a3",
"b3",
"c3",
"d3",
"e3",
"f3",
"g3",
"h3",
"a2",
"b2",
"c2",
"d2",
"e2",
"f2",
"g2",
"h2",
"a1",
"b1",
"c1",
"d1",
"e1",
"f1",
"g1",
"h1"
];
var BITS = {
NORMAL: 1,
CAPTURE: 2,
BIG_PAWN: 4,
EP_CAPTURE: 8,
PROMOTION: 16,
KSIDE_CASTLE: 32,
QSIDE_CASTLE: 64,
NULL_MOVE: 128
};
var SEVEN_TAG_ROSTER = {
Event: "?",
Site: "?",
Date: "????.??.??",
Round: "?",
White: "?",
Black: "?",
Result: "*"
};
var SUPLEMENTAL_TAGS = {
WhiteTitle: null,
BlackTitle: null,
WhiteElo: null,
BlackElo: null,
WhiteUSCF: null,
BlackUSCF: null,
WhiteNA: null,
BlackNA: null,
WhiteType: null,
BlackType: null,
EventDate: null,
EventSponsor: null,
Section: null,
Stage: null,
Board: null,
Opening: null,
Variation: null,
SubVariation: null,
ECO: null,
NIC: null,
Time: null,
UTCTime: null,
UTCDate: null,
TimeControl: null,
SetUp: null,
FEN: null,
Termination: null,
Annotator: null,
Mode: null,
PlyCount: null
};
var HEADER_TEMPLATE = {
...SEVEN_TAG_ROSTER,
...SUPLEMENTAL_TAGS
};
var Ox88 = {
a8: 0,
b8: 1,
c8: 2,
d8: 3,
e8: 4,
f8: 5,
g8: 6,
h8: 7,
a7: 16,
b7: 17,
c7: 18,
d7: 19,
e7: 20,
f7: 21,
g7: 22,
h7: 23,
a6: 32,
b6: 33,
c6: 34,
d6: 35,
e6: 36,
f6: 37,
g6: 38,
h6: 39,
a5: 48,
b5: 49,
c5: 50,
d5: 51,
e5: 52,
f5: 53,
g5: 54,
h5: 55,
a4: 64,
b4: 65,
c4: 66,
d4: 67,
e4: 68,
f4: 69,
g4: 70,
h4: 71,
a3: 80,
b3: 81,
c3: 82,
d3: 83,
e3: 84,
f3: 85,
g3: 86,
h3: 87,
a2: 96,
b2: 97,
c2: 98,
d2: 99,
e2: 100,
f2: 101,
g2: 102,
h2: 103,
a1: 112,
b1: 113,
c1: 114,
d1: 115,
e1: 116,
f1: 117,
g1: 118,
h1: 119
};
var PAWN_OFFSETS = {
b: [16, 32, 17, 15],
w: [-16, -32, -17, -15]
};
var PIECE_OFFSETS = {
n: [-18, -33, -31, -14, 18, 33, 31, 14],
b: [-17, -15, 17, 15],
r: [-16, 1, 16, -1],
q: [-17, -16, -15, 1, 17, 16, 15, -1],
k: [-17, -16, -15, 1, 17, 16, 15, -1]
};
var ATTACKS = [
20,
0,
0,
0,
0,
0,
0,
24,
0,
0,
0,
0,
0,
0,
20,
0,
0,
20,
0,
0,
0,
0,
0,
24,
0,
0,
0,
0,
0,
20,
0,
0,
0,
0,
20,
0,
0,
0,
0,
24,
0,
0,
0,
0,
20,
0,
0,
0,
0,
0,
0,
20,
0,
0,
0,
24,
0,
0,
0,
20,
0,
0,
0,
0,
0,
0,
0,
0,
20,
0,
0,
24,
0,
0,
20,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
20,
2,
24,
2,
20,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
2,
53,
56,
53,
2,
0,
0,
0,
0,
0,
0,
24,
24,
24,
24,
24,
24,
56,
0,
56,
24,
24,
24,
24,
24,
24,
0,
0,
0,
0,
0,
0,
2,
53,
56,
53,
2,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
20,
2,
24,
2,
20,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
20,
0,
0,
24,
0,
0,
20,
0,
0,
0,
0,
0,
0,
0,
0,
20,
0,
0,
0,
24,
0,
0,
0,
20,
0,
0,
0,
0,
0,
0,
20,
0,
0,
0,
0,
24,
0,
0,
0,
0,
20,
0,
0,
0,
0,
20,
0,
0,
0,
0,
0,
24,
0,
0,
0,
0,
0,
20,
0,
0,
20,
0,
0,
0,
0,
0,
0,
24,
0,
0,
0,
0,
0,
0,
20
];
var RAYS = [
17,
0,
0,
0,
0,
0,
0,
16,
0,
0,
0,
0,
0,
0,
15,
0,
0,
17,
0,
0,
0,
0,
0,
16,
0,
0,
0,
0,
0,
15,
0,
0,
0,
0,
17,
0,
0,
0,
0,
16,
0,
0,
0,
0,
15,
0,
0,
0,
0,
0,
0,
17,
0,
0,
0,
16,
0,
0,
0,
15,
0,
0,
0,
0,
0,
0,
0,
0,
17,
0,
0,
16,
0,
0,
15,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
17,
0,
16,
0,
15,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
17,
16,
15,
0,
0,
0,
0,
0,
0,
0,
1,
1,
1,
1,
1,
1,
1,
0,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
0,
0,
0,
0,
0,
0,
0,
-15,
-16,
-17,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
-15,
0,
-16,
0,
-17,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
-15,
0,
0,
-16,
0,
0,
-17,
0,
0,
0,
0,
0,
0,
0,
0,
-15,
0,
0,
0,
-16,
0,
0,
0,
-17,
0,
0,
0,
0,
0,
0,
-15,
0,
0,
0,
0,
-16,
0,
0,
0,
0,
-17,
0,
0,
0,
0,
-15,
0,
0,
0,
0,
0,
-16,
0,
0,
0,
0,
0,
-17,
0,
0,
-15,
0,
0,
0,
0,
0,
0,
-16,
0,
0,
0,
0,
0,
0,
-17
];
var PIECE_MASKS = { p: 1, n: 2, b: 4, r: 8, q: 16, k: 32 };
var SYMBOLS = "pnbrqkPNBRQK";
var PROMOTIONS = [KNIGHT, BISHOP, ROOK, QUEEN];
var RANK_1 = 7;
var RANK_2 = 6;
var RANK_7 = 1;