[vchess.git] / public / javascripts / variants / Crazyhouse.js

class CrazyhouseRules extends ChessRules
{
	static IsGoodFen(fen)
	{
		if (!ChessRules.IsGoodFen(fen))
			return false;
		const fenParsed = V.ParseFen(fen);
		// 5) Check reserves
		if (!fenParsed.reserve || !fenParsed.reserve.match(/^[0-9]{10,10}$/))
			return false;
		// 6) Check promoted array
		if (!fenParsed.promoted)
			return false;
		if (fenParsed.promoted == "-")
			return true; //no promoted piece on board
		const squares = fenParsed.promoted.split(",");
		for (let square of squares)
		{
			const c = V.SquareToCoords(square);
			if (c.y < 0 || c.y > V.size.y || isNaN(c.x) || c.x < 0 || c.x > V.size.x)
				return false;
		}
		return true;
	}

	static ParseFen(fen)
	{
		const fenParts = fen.split(" ");
		return Object.assign(
			ChessRules.ParseFen(fen),
			{
				reserve: fenParts[4],
				promoted: fenParts[5],
			}
		);
	}

	static GenRandInitFen()
	{
		return ChessRules.GenRandInitFen() + " 0000000000 -";
	}

	getFen()
	{
		return super.getFen() + " " + this.getReserveFen() + " " + this.getPromotedFen();
	}

	getReserveFen()
	{
		let counts = new Array(10);
		for (let i=0; i<V.PIECES.length-1; i++) //-1: no king reserve
		{
			counts[i] = this.reserve["w"][V.PIECES[i]];
			counts[5+i] = this.reserve["b"][V.PIECES[i]];
		}
		return counts.join("");
	}

	getPromotedFen()
	{
		let res = "";
		for (let i=0; i<V.size.x; i++)
		{
			for (let j=0; j<V.size.y; j++)
			{
				if (this.promoted[i][j])
					res += V.CoordsToSquare({x:i,y:j});
			}
		}
		if (res.length > 0)
			res = res.slice(0,-1); //remove last comma
		else
			res = "-";
		return res;
	}

	setOtherVariables(fen)
	{
		super.setOtherVariables(fen);
		const fenParsed = V.ParseFen(fen);
		// Also init reserves (used by the interface to show landable pieces)
		this.reserve =
		{
			"w":
			{
				[V.PAWN]: parseInt(fenParsed.reserve[0]),
				[V.ROOK]: parseInt(fenParsed.reserve[1]),
				[V.KNIGHT]: parseInt(fenParsed.reserve[2]),
				[V.BISHOP]: parseInt(fenParsed.reserve[3]),
				[V.QUEEN]: parseInt(fenParsed.reserve[4]),
			},
			"b":
			{
				[V.PAWN]: parseInt(fenParsed.reserve[5]),
				[V.ROOK]: parseInt(fenParsed.reserve[6]),
				[V.KNIGHT]: parseInt(fenParsed.reserve[7]),
				[V.BISHOP]: parseInt(fenParsed.reserve[8]),
				[V.QUEEN]: parseInt(fenParsed.reserve[9]),
			}
		};
		this.promoted = doubleArray(V.size.x, V.size.y, false);
		if (fenParsed.promoted != "-")
		{
			for (let square of fenParsed.promoted.split(","))
			{
				const [x,y] = V.SquareToCoords(square);
				promoted[x][y] = true;
			}
		}
	}

	getColor(i,j)
	{
		if (i >= V.size.x)
			return (i==V.size.x ? "w" : "b");
		return this.board[i][j].charAt(0);
	}

	getPiece(i,j)
	{
		if (i >= V.size.x)
			return V.RESERVE_PIECES[j];
		return this.board[i][j].charAt(1);
	}

	// Used by the interface:
	getReservePpath(color, index)
	{
		return color + V.RESERVE_PIECES[index];
	}

	// Ordering on reserve pieces
	static get RESERVE_PIECES()
	{
		return [V.PAWN,V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN];
	}

	getReserveMoves([x,y])
	{
		const color = this.turn;
		const p = V.RESERVE_PIECES[y];
		if (this.reserve[color][p] == 0)
			return [];
		let moves = [];
		const pawnShift = (p==V.PAWN ? 1 : 0);
		for (let i=pawnShift; i<V.size.x-pawnShift; i++)
		{
			for (let j=0; j<V.size.y; j++)
			{
				if (this.board[i][j] == V.EMPTY)
				{
					let mv = new Move({
						appear: [
							new PiPo({
								x: i,
								y: j,
								c: color,
								p: p
							})
						],
						vanish: [],
						start: {x:x, y:y}, //a bit artificial...
						end: {x:i, y:j}
					});
					moves.push(mv);
				}
			}
		}
		return moves;
	}

	getPotentialMovesFrom([x,y])
	{
		if (x >= V.size.x)
		{
			// Reserves, outside of board: x == sizeX(+1)
			return this.getReserveMoves([x,y]);
		}
		// Standard moves
		return super.getPotentialMovesFrom([x,y]);
	}

	getAllValidMoves()
	{
		let moves = super.getAllValidMoves();
		const color = this.turn;
		for (let i=0; i<V.RESERVE_PIECES.length; i++)
			moves = moves.concat(this.getReserveMoves([V.size.x+(color=="w"?0:1),i]));
		return this.filterValid(moves);
	}

	atLeastOneMove()
	{
		if (!super.atLeastOneMove())
		{
			const color = this.turn;
			// Search one reserve move
			for (let i=0; i<V.RESERVE_PIECES.length; i++)
			{
				let moves = this.filterValid(
					this.getReserveMoves([V.size.x+(this.turn=="w"?0:1), i]) );
				if (moves.length > 0)
					return true;
			}
			return false;
		}
		return true;
	}

	updateVariables(move)
	{
		super.updateVariables(move);
		if (move.vanish.length == 2 && move.appear.length == 2)
			return; //skip castle
		const color = move.appear[0].c;
		if (move.vanish.length == 0)
		{
			this.reserve[color][move.appear[0].p]--;
			return;
		}
		move.movePromoted = this.promoted[move.start.x][move.start.y];
		move.capturePromoted = this.promoted[move.end.x][move.end.y]
		this.promoted[move.start.x][move.start.y] = false;
		this.promoted[move.end.x][move.end.y] = move.movePromoted
			|| (move.vanish[0].p == V.PAWN && move.appear[0].p != V.PAWN);
		if (move.capturePromoted)
			this.reserve[color][V.PAWN]++;
		else if (move.vanish.length == 2)
			this.reserve[color][move.vanish[1].p]++;
	}

	unupdateVariables(move)
	{
		super.unupdateVariables(move);
		if (move.vanish.length == 2 && move.appear.length == 2)
			return;
		const color = this.turn;
		if (move.vanish.length == 0)
		{
			this.reserve[color][move.appear[0].p]++;
			return;
		}
		if (move.movePromoted)
			this.promoted[move.start.x][move.start.y] = true;
		this.promoted[move.end.x][move.end.y] = move.capturePromoted;
		if (move.capturePromoted)
			this.reserve[color][V.PAWN]--;
		else if (move.vanish.length == 2)
			this.reserve[color][move.vanish[1].p]--;
	}

	static get SEARCH_DEPTH() { return 2; } //high branching factor

	evalPosition()
	{
		let evaluation = super.evalPosition();
		// Add reserves:
		for (let i=0; i<V.RESERVE_PIECES.length; i++)
		{
			const p = V.RESERVE_PIECES[i];
			evaluation += this.reserve["w"][p] * V.VALUES[p];
			evaluation -= this.reserve["b"][p] * V.VALUES[p];
		}
		return evaluation;
	}

	getNotation(move)
	{
		if (move.vanish.length > 0)
			return super.getNotation(move);
		// Rebirth:
		const piece =
			(move.appear[0].p != V.PAWN ? move.appear[0].p.toUpperCase() : "");
		return piece + "@" + V.CoordsToSquare(move.end);
	}

	getLongNotation(move)
	{
		if (move.vanish.length > 0)
			return super.getLongNotation(move);
		return "@" + V.CoordsToSquare(move.end);
	}
}

const VariantRules = CrazyhouseRules;
Commit	Line	Data
	1	class CrazyhouseRules extends ChessRules
	2	{
	3	static IsGoodFen(fen)
	4	{
	5	if (!ChessRules.IsGoodFen(fen))
	6	return false;
	7	const fenParsed = V.ParseFen(fen);
	8	// 5) Check reserves
	9	if (!fenParsed.reserve \|\| !fenParsed.reserve.match(/^[0-9]{10,10}$/))
	10	return false;
	11	// 6) Check promoted array
	12	if (!fenParsed.promoted)
	13	return false;
	14	if (fenParsed.promoted == "-")
	15	return true; //no promoted piece on board
	16	const squares = fenParsed.promoted.split(",");
	17	for (let square of squares)
	18	{
	19	const c = V.SquareToCoords(square);
	20	if (c.y < 0 \|\| c.y > V.size.y \|\| isNaN(c.x) \|\| c.x < 0 \|\| c.x > V.size.x)
	21	return false;
	22	}
	23	return true;
	24	}
	25
	26	static ParseFen(fen)
	27	{
	28	const fenParts = fen.split(" ");
	29	return Object.assign(
	30	ChessRules.ParseFen(fen),
	31	{
	32	reserve: fenParts[4],
	33	promoted: fenParts[5],
	34	}
	35	);
	36	}
	37
	38	static GenRandInitFen()
	39	{
	40	return ChessRules.GenRandInitFen() + " 0000000000 -";
	41	}
	42
	43	getFen()
	44	{
	45	return super.getFen() + " " + this.getReserveFen() + " " + this.getPromotedFen();
	46	}
	47
	48	getReserveFen()
	49	{
	50	let counts = new Array(10);
	51	for (let i=0; i<V.PIECES.length-1; i++) //-1: no king reserve
	52	{
	53	counts[i] = this.reserve["w"][V.PIECES[i]];
	54	counts[5+i] = this.reserve["b"][V.PIECES[i]];
	55	}
	56	return counts.join("");
	57	}
	58
	59	getPromotedFen()
	60	{
	61	let res = "";
	62	for (let i=0; i<V.size.x; i++)
	63	{
	64	for (let j=0; j<V.size.y; j++)
	65	{
	66	if (this.promoted[i][j])
	67	res += V.CoordsToSquare({x:i,y:j});
	68	}
	69	}
	70	if (res.length > 0)
	71	res = res.slice(0,-1); //remove last comma
	72	else
	73	res = "-";
	74	return res;
	75	}
	76
	77	setOtherVariables(fen)
	78	{
	79	super.setOtherVariables(fen);
	80	const fenParsed = V.ParseFen(fen);
	81	// Also init reserves (used by the interface to show landable pieces)
	82	this.reserve =
	83	{
	84	"w":
	85	{
	86	[V.PAWN]: parseInt(fenParsed.reserve[0]),
	87	[V.ROOK]: parseInt(fenParsed.reserve[1]),
	88	[V.KNIGHT]: parseInt(fenParsed.reserve[2]),
	89	[V.BISHOP]: parseInt(fenParsed.reserve[3]),
	90	[V.QUEEN]: parseInt(fenParsed.reserve[4]),
	91	},
	92	"b":
	93	{
	94	[V.PAWN]: parseInt(fenParsed.reserve[5]),
	95	[V.ROOK]: parseInt(fenParsed.reserve[6]),
	96	[V.KNIGHT]: parseInt(fenParsed.reserve[7]),
	97	[V.BISHOP]: parseInt(fenParsed.reserve[8]),
	98	[V.QUEEN]: parseInt(fenParsed.reserve[9]),
	99	}
	100	};
	101	this.promoted = doubleArray(V.size.x, V.size.y, false);
	102	if (fenParsed.promoted != "-")
	103	{
	104	for (let square of fenParsed.promoted.split(","))
	105	{
	106	const [x,y] = V.SquareToCoords(square);
	107	promoted[x][y] = true;
	108	}
	109	}
	110	}
	111
	112	getColor(i,j)
	113	{
	114	if (i >= V.size.x)
	115	return (i==V.size.x ? "w" : "b");
	116	return this.board[i][j].charAt(0);
	117	}
	118
	119	getPiece(i,j)
	120	{
	121	if (i >= V.size.x)
	122	return V.RESERVE_PIECES[j];
	123	return this.board[i][j].charAt(1);
	124	}
	125
	126	// Used by the interface:
	127	getReservePpath(color, index)
	128	{
	129	return color + V.RESERVE_PIECES[index];
	130	}
	131
	132	// Ordering on reserve pieces
	133	static get RESERVE_PIECES()
	134	{
	135	return [V.PAWN,V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN];
	136	}
	137
	138	getReserveMoves([x,y])
	139	{
	140	const color = this.turn;
	141	const p = V.RESERVE_PIECES[y];
	142	if (this.reserve[color][p] == 0)
	143	return [];
	144	let moves = [];
	145	const pawnShift = (p==V.PAWN ? 1 : 0);
	146	for (let i=pawnShift; i<V.size.x-pawnShift; i++)
	147	{
	148	for (let j=0; j<V.size.y; j++)
	149	{
	150	if (this.board[i][j] == V.EMPTY)
	151	{
	152	let mv = new Move({
	153	appear: [
	154	new PiPo({
	155	x: i,
	156	y: j,
	157	c: color,
	158	p: p
	159	})
	160	],
	161	vanish: [],
	162	start: {x:x, y:y}, //a bit artificial...
	163	end: {x:i, y:j}
	164	});
	165	moves.push(mv);
	166	}
	167	}
	168	}
	169	return moves;
	170	}
	171
	172	getPotentialMovesFrom([x,y])
	173	{
	174	if (x >= V.size.x)
	175	{
	176	// Reserves, outside of board: x == sizeX(+1)
	177	return this.getReserveMoves([x,y]);
	178	}
	179	// Standard moves
	180	return super.getPotentialMovesFrom([x,y]);
	181	}
	182
	183	getAllValidMoves()
	184	{
	185	let moves = super.getAllValidMoves();
	186	const color = this.turn;
	187	for (let i=0; i<V.RESERVE_PIECES.length; i++)
	188	moves = moves.concat(this.getReserveMoves([V.size.x+(color=="w"?0:1),i]));
	189	return this.filterValid(moves);
	190	}
	191
	192	atLeastOneMove()
	193	{
	194	if (!super.atLeastOneMove())
	195	{
	196	const color = this.turn;
	197	// Search one reserve move
	198	for (let i=0; i<V.RESERVE_PIECES.length; i++)
	199	{
	200	let moves = this.filterValid(
	201	this.getReserveMoves([V.size.x+(this.turn=="w"?0:1), i]) );
	202	if (moves.length > 0)
	203	return true;
	204	}
	205	return false;
	206	}
	207	return true;
	208	}
	209
	210	updateVariables(move)
	211	{
	212	super.updateVariables(move);
	213	if (move.vanish.length == 2 && move.appear.length == 2)
	214	return; //skip castle
	215	const color = move.appear[0].c;
	216	if (move.vanish.length == 0)
	217	{
	218	this.reserve[color][move.appear[0].p]--;
	219	return;
	220	}
	221	move.movePromoted = this.promoted[move.start.x][move.start.y];
	222	move.capturePromoted = this.promoted[move.end.x][move.end.y]
	223	this.promoted[move.start.x][move.start.y] = false;
	224	this.promoted[move.end.x][move.end.y] = move.movePromoted
	225	\|\| (move.vanish[0].p == V.PAWN && move.appear[0].p != V.PAWN);
	226	if (move.capturePromoted)
	227	this.reserve[color][V.PAWN]++;
	228	else if (move.vanish.length == 2)
	229	this.reserve[color][move.vanish[1].p]++;
	230	}
	231
	232	unupdateVariables(move)
	233	{
	234	super.unupdateVariables(move);
	235	if (move.vanish.length == 2 && move.appear.length == 2)
	236	return;
	237	const color = this.turn;
	238	if (move.vanish.length == 0)
	239	{
	240	this.reserve[color][move.appear[0].p]++;
	241	return;
	242	}
	243	if (move.movePromoted)
	244	this.promoted[move.start.x][move.start.y] = true;
	245	this.promoted[move.end.x][move.end.y] = move.capturePromoted;
	246	if (move.capturePromoted)
	247	this.reserve[color][V.PAWN]--;
	248	else if (move.vanish.length == 2)
	249	this.reserve[color][move.vanish[1].p]--;
	250	}
	251
	252	static get SEARCH_DEPTH() { return 2; } //high branching factor
	253
	254	evalPosition()
	255	{
	256	let evaluation = super.evalPosition();
	257	// Add reserves:
	258	for (let i=0; i<V.RESERVE_PIECES.length; i++)
	259	{
	260	const p = V.RESERVE_PIECES[i];
	261	evaluation += this.reserve["w"][p] * V.VALUES[p];
	262	evaluation -= this.reserve["b"][p] * V.VALUES[p];
	263	}
	264	return evaluation;
	265	}
	266
	267	getNotation(move)
	268	{
	269	if (move.vanish.length > 0)
	270	return super.getNotation(move);
	271	// Rebirth:
	272	const piece =
	273	(move.appear[0].p != V.PAWN ? move.appear[0].p.toUpperCase() : "");
	274	return piece + "@" + V.CoordsToSquare(move.end);
	275	}
	276
	277	getLongNotation(move)
	278	{
	279	if (move.vanish.length > 0)
	280	return super.getLongNotation(move);
	281	return "@" + V.CoordsToSquare(move.end);
	282	}
	283	}
	284
	285	const VariantRules = CrazyhouseRules;