-import { ChessRules } from "@/base_rules";
+import { ChessRules, Move, PiPo } from "@/base_rules";
import { ArrayFun } from "@/utils/array";
import { sample, randInt } from "@/utils/alea";
-export const VariantRules = class WildebeestRules extends ChessRules
-{
- static getPpath(b)
- {
- return ([V.CAMEL,V.WILDEBEEST].includes(b[1]) ? "Wildebeest/" : "") + b;
- }
+export class WildebeestRules extends ChessRules {
- static get size() { return {x:10,y:11}; }
+ static get size() {
+ return { x: 10, y: 11 };
+ }
- static get CAMEL() { return 'c'; }
- static get WILDEBEEST() { return 'w'; }
+ static get CAMEL() {
+ return "c";
+ }
+ static get WILDEBEEST() {
+ return "w";
+ }
- static get PIECES()
- {
- return ChessRules.PIECES.concat([V.CAMEL,V.WILDEBEEST]);
+ static get PIECES() {
+ return ChessRules.PIECES.concat([V.CAMEL, V.WILDEBEEST]);
}
- static get steps()
- {
+ static get steps() {
return Object.assign(
- ChessRules.steps, //add camel moves:
- {'c': [ [-3,-1],[-3,1],[-1,-3],[-1,3],[1,-3],[1,3],[3,-1],[3,1] ]}
+ {},
+ ChessRules.steps,
+ // Add camel moves:
+ {
+ c: [
+ [-3, -1],
+ [-3, 1],
+ [-1, -3],
+ [-1, 3],
+ [1, -3],
+ [1, 3],
+ [3, -1],
+ [3, 1]
+ ]
+ }
);
}
- static IsGoodEnpassant(enpassant)
- {
- if (enpassant != "-")
- {
- const squares = enpassant.split(",");
- if (squares.length > 2)
- return false;
- for (let sq of squares)
- {
- const ep = V.SquareToCoords(sq);
- if (isNaN(ep.x) || !V.OnBoard(ep))
- return false;
- }
- }
+ static IsGoodEnpassant(enpassant) {
+ if (enpassant != "-") return !!enpassant.match(/^([a-j][0-9]{1,2},?)+$/);
return true;
}
+ getPpath(b) {
+ return ([V.CAMEL, V.WILDEBEEST].includes(b[1]) ? "Wildebeest/" : "") + b;
+ }
+
// There may be 2 enPassant squares (if pawn jump 3 squares)
- getEnpassantFen()
- {
+ getEnpassantFen() {
const L = this.epSquares.length;
- if (!this.epSquares[L-1])
- return "-"; //no en-passant
+ if (!this.epSquares[L - 1]) return "-"; //no en-passant
let res = "";
- this.epSquares[L-1].forEach(sq => {
+ this.epSquares[L - 1].forEach(sq => {
res += V.CoordsToSquare(sq) + ",";
});
- return res.slice(0,-1); //remove last comma
+ return res.slice(0, -1); //remove last comma
}
// En-passant after 2-sq or 3-sq jumps
- getEpSquare(moveOrSquare)
- {
- if (!moveOrSquare)
- return undefined;
- if (typeof moveOrSquare === "string")
- {
+ getEpSquare(moveOrSquare) {
+ if (!moveOrSquare) return undefined;
+ if (typeof moveOrSquare === "string") {
const square = moveOrSquare;
- if (square == "-")
- return undefined;
+ if (square == "-") return undefined;
let res = [];
square.split(",").forEach(sq => {
res.push(V.SquareToCoords(sq));
}
// Argument is a move:
const move = moveOrSquare;
- const [sx,sy,ex] = [move.start.x,move.start.y,move.end.x];
- if (this.getPiece(sx,sy) == V.PAWN && Math.abs(sx - ex) >= 2)
- {
- const step = (ex-sx) / Math.abs(ex-sx);
- let res = [{
- x: sx + step,
- y: sy
- }];
- if (sx + 2*step != ex) //3-squares move
- {
+ const [sx, sy, ex] = [move.start.x, move.start.y, move.end.x];
+ if (this.getPiece(sx, sy) == V.PAWN && Math.abs(sx - ex) >= 2) {
+ const step = (ex - sx) / Math.abs(ex - sx);
+ let res = [
+ {
+ x: sx + step,
+ y: sy
+ }
+ ];
+ if (sx + 2 * step != ex) {
+ // 3-squares move
res.push({
- x: sx + 2*step,
+ x: sx + 2 * step,
y: sy
});
}
return undefined; //default
}
- getPotentialMovesFrom([x,y])
- {
- switch (this.getPiece(x,y))
- {
+ getPotentialMovesFrom([x, y]) {
+ switch (this.getPiece(x, y)) {
case V.CAMEL:
- return this.getPotentialCamelMoves([x,y]);
+ return this.getPotentialCamelMoves([x, y]);
case V.WILDEBEEST:
- return this.getPotentialWildebeestMoves([x,y]);
+ return this.getPotentialWildebeestMoves([x, y]);
default:
- return super.getPotentialMovesFrom([x,y])
+ return super.getPotentialMovesFrom([x, y]);
}
}
// Pawns jump 2 or 3 squares, and promote to queen or wildebeest
- getPotentialPawnMoves([x,y])
- {
+ getPotentialPawnMoves([x, y]) {
const color = this.turn;
let moves = [];
- const [sizeX,sizeY] = [V.size.x,V.size.y];
- const shiftX = (color == "w" ? -1 : 1);
- const startRanks = (color == "w" ? [sizeX-2,sizeX-3] : [1,2]);
- const lastRank = (color == "w" ? 0 : sizeX-1);
- const finalPieces = x + shiftX == lastRank
- ? [V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN]
- : [V.PAWN];
-
- if (this.board[x+shiftX][y] == V.EMPTY)
- {
+ const [sizeX, sizeY] = [V.size.x, V.size.y];
+ const shiftX = color == "w" ? -1 : 1;
+ const startRanks = color == "w" ? [sizeX - 2, sizeX - 3] : [1, 2];
+ const lastRanks = color == "w" ? [0, 1] : [sizeX - 1, sizeX -2];
+ let finalPieces = [V.PAWN];
+ if (x + shiftX == lastRanks[1])
+ Array.prototype.push.apply(finalPieces, [V.WILDEBEEST, V.QUEEN]);
+ else if (x + shiftX == lastRanks[0])
+ finalPieces = [V.WILDEBEEST, V.QUEEN];
+
+ if (this.board[x + shiftX][y] == V.EMPTY) {
// One square forward
for (let piece of finalPieces)
- moves.push(this.getBasicMove([x,y], [x+shiftX,y], {c:color,p:piece}));
- if (startRanks.includes(x))
- {
- if (this.board[x+2*shiftX][y] == V.EMPTY)
- {
+ moves.push(
+ this.getBasicMove([x, y], [x + shiftX, y], { c: color, p: piece })
+ );
+ if (startRanks.includes(x)) {
+ if (this.board[x + 2 * shiftX][y] == V.EMPTY) {
// Two squares jump
- moves.push(this.getBasicMove([x,y], [x+2*shiftX,y]));
- if (x==startRanks[0] && this.board[x+3*shiftX][y] == V.EMPTY)
- {
+ moves.push(this.getBasicMove([x, y], [x + 2 * shiftX, y]));
+ if (x == startRanks[0] && this.board[x + 3 * shiftX][y] == V.EMPTY) {
// Three squares jump
- moves.push(this.getBasicMove([x,y], [x+3*shiftX,y]));
+ moves.push(this.getBasicMove([x, y], [x + 3 * shiftX, y]));
}
}
}
}
// Captures
- for (let shiftY of [-1,1])
- {
- if (y + shiftY >= 0 && y + shiftY < sizeY
- && this.board[x+shiftX][y+shiftY] != V.EMPTY
- && this.canTake([x,y], [x+shiftX,y+shiftY]))
- {
- for (let piece of finalPieces)
- {
- moves.push(this.getBasicMove([x,y], [x+shiftX,y+shiftY],
- {c:color,p:piece}));
+ for (let shiftY of [-1, 1]) {
+ if (
+ y + shiftY >= 0 &&
+ y + shiftY < sizeY &&
+ this.board[x + shiftX][y + shiftY] != V.EMPTY &&
+ this.canTake([x, y], [x + shiftX, y + shiftY])
+ ) {
+ for (let piece of finalPieces) {
+ moves.push(
+ this.getBasicMove([x, y], [x + shiftX, y + shiftY], {
+ c: color,
+ p: piece
+ })
+ );
}
}
}
// En passant
const Lep = this.epSquares.length;
- const epSquare = this.epSquares[Lep-1];
- if (!!epSquare)
- {
- for (let epsq of epSquare)
- {
+ const epSquare = this.epSquares[Lep - 1];
+ if (!!epSquare) {
+ for (let epsq of epSquare) {
// TODO: some redundant checks
- if (epsq.x == x+shiftX && Math.abs(epsq.y - y) == 1)
- {
- var enpassantMove = this.getBasicMove([x,y], [epsq.x,epsq.y]);
+ if (epsq.x == x + shiftX && Math.abs(epsq.y - y) == 1) {
+ let enpassantMove = this.getBasicMove([x, y], [epsq.x, epsq.y]);
// WARNING: the captured pawn may be diagonally behind us,
// if it's a 3-squares jump and we take on 1st passing square
- const px = (this.board[x][epsq.y] != V.EMPTY ? x : x - shiftX);
+ const px = this.board[x][epsq.y] != V.EMPTY ? x : x - shiftX;
enpassantMove.vanish.push({
x: px,
y: epsq.y,
- p: 'p',
- c: this.getColor(px,epsq.y)
+ p: "p",
+ c: this.getColor(px, epsq.y)
});
moves.push(enpassantMove);
}
return moves;
}
- // TODO: wildebeest castle
-
- getPotentialCamelMoves(sq)
- {
+ getPotentialCamelMoves(sq) {
return this.getSlideNJumpMoves(sq, V.steps[V.CAMEL], "oneStep");
}
- getPotentialWildebeestMoves(sq)
- {
+ getPotentialWildebeestMoves(sq) {
return this.getSlideNJumpMoves(
- sq, V.steps[V.KNIGHT].concat(V.steps[V.CAMEL]), "oneStep");
+ sq,
+ V.steps[V.KNIGHT].concat(V.steps[V.CAMEL]),
+ "oneStep"
+ );
}
- isAttacked(sq, colors)
- {
- return super.isAttacked(sq, colors)
- || this.isAttackedByCamel(sq, colors)
- || this.isAttackedByWildebeest(sq, colors);
+ getPPpath(m) {
+ if (
+ m.appear.length == 2 && m.vanish.length == 2 &&
+ Math.abs(m.end.y - m.start.y) == 1 &&
+ this.board[m.end.x][m.end.y] == V.EMPTY
+ ) {
+ // Castle, king moved by one square only, not directly onto rook
+ return "Wildebeest/castle";
+ }
+ return super.getPPpath(m);
}
- isAttackedByCamel(sq, colors)
- {
- return this.isAttackedBySlideNJump(sq, colors,
- V.CAMEL, V.steps[V.CAMEL], "oneStep");
+ // Special Wildebeest castling rules:
+ getCastleMoves([x, y]) {
+ const c = this.getColor(x, y);
+ const oppCol = V.GetOppCol(c);
+ let moves = [];
+ let i = 0;
+ const castlingKing = this.board[x][y].charAt(1);
+ castlingCheck: for (
+ let castleSide = 0;
+ castleSide < 2;
+ castleSide++ //"large", then "small"
+ ) {
+ if (this.castleFlags[c][castleSide] >= V.size.y) continue;
+ // Rook and king are on initial position
+ const rookPos = this.castleFlags[c][castleSide];
+ const range = (castleSide == 0 ? [rookPos, y] : [y, rookPos]);
+
+ // King and rook must be connected:
+ for (let i = range[0] + 1; i <= range[1] - 1; i++) {
+ if (this.board[x][i] != V.EMPTY) continue castlingCheck;
+ }
+ const step = 2 * castleSide - 1;
+ // No attacks on the path of the king ?
+ for (let i = range[0]; i <= range[1]; i++) {
+ if (i != rookPos && this.isAttacked([x, i], oppCol))
+ continue castlingCheck;
+ if (
+ i != y &&
+ // Do not end in the corner, except if starting square is too near
+ (i > 0 || y == 1) &&
+ (i < V.size.y - 1 || y == V.size.y - 2)
+ ) {
+ // Found a possible castle move:
+ moves.push(
+ new Move({
+ appear: [
+ new PiPo({
+ x: x,
+ y: i,
+ p: V.KING,
+ c: c
+ }),
+ new PiPo({
+ x: x,
+ y: i - step,
+ p: V.ROOK,
+ c: c
+ })
+ ],
+ vanish: [
+ new PiPo({ x: x, y: y, p: V.KING, c: c }),
+ new PiPo({ x: x, y: rookPos, p: V.ROOK, c: c })
+ ]
+ })
+ );
+ }
+ }
+ }
+
+ return moves;
+ }
+
+ isAttacked(sq, color) {
+ return (
+ super.isAttacked(sq, color) ||
+ this.isAttackedByCamel(sq, color) ||
+ this.isAttackedByWildebeest(sq, color)
+ );
}
- isAttackedByWildebeest(sq, colors)
- {
- return this.isAttackedBySlideNJump(sq, colors, V.WILDEBEEST,
- V.steps[V.KNIGHT].concat(V.steps[V.CAMEL]), "oneStep");
+ isAttackedByCamel(sq, color) {
+ return this.isAttackedBySlideNJump(
+ sq,
+ color,
+ V.CAMEL,
+ V.steps[V.CAMEL],
+ "oneStep"
+ );
}
- getCurrentScore()
- {
- if (this.atLeastOneMove()) // game not over
- return "*";
+ isAttackedByWildebeest(sq, color) {
+ return this.isAttackedBySlideNJump(
+ sq,
+ color,
+ V.WILDEBEEST,
+ V.steps[V.KNIGHT].concat(V.steps[V.CAMEL]),
+ "oneStep"
+ );
+ }
+ getCurrentScore() {
+ if (this.atLeastOneMove()) return "*";
// No valid move: game is lost (stalemate is a win)
- return (this.turn == "w" ? "0-1" : "1-0");
+ return this.turn == "w" ? "0-1" : "1-0";
}
static get VALUES() {
return Object.assign(
- ChessRules.VALUES,
- {'c': 3, 'w': 7} //experimental
+ { c: 3, w: 7 }, //experimental
+ ChessRules.VALUES
);
}
- static get SEARCH_DEPTH() { return 2; }
+ static get SEARCH_DEPTH() {
+ return 2;
+ }
+
+ static GenRandInitFen(randomness) {
+ if (randomness == 0) {
+ return (
+ "rnccwkqbbnr/ppppppppppp/92/92/92/92/92/92/PPPPPPPPPPP/RNBBQKWCCNR " +
+ "w 0 akak -"
+ );
+ }
+
+ let pieces = { w: new Array(11), b: new Array(11) };
+ let flags = "";
+ for (let c of ["w", "b"]) {
+ if (c == 'b' && randomness == 1) {
+ pieces['b'] = pieces['w'];
+ flags += flags;
+ break;
+ }
- static GenRandInitFen()
- {
- let pieces = { "w": new Array(10), "b": new Array(10) };
- for (let c of ["w","b"])
- {
let positions = ArrayFun.range(11);
// Get random squares for bishops + camels (different colors)
- let randIndexes = sample(ArrayFun.range(6), 2)
- .map(i => { return 2*i; });
+ let randIndexes = sample(ArrayFun.range(6), 2).map(i => {
+ return 2 * i;
+ });
let bishop1Pos = positions[randIndexes[0]];
let camel1Pos = positions[randIndexes[1]];
// The second bishop (camel) must be on a square of different color
- let randIndexes_tmp = sample(ArrayFun.range(5), 2)
- .map(i => { return 2*i+1; });
+ let randIndexes_tmp = sample(ArrayFun.range(5), 2).map(i => {
+ return 2 * i + 1;
+ });
let bishop2Pos = positions[randIndexes_tmp[0]];
let camel2Pos = positions[randIndexes_tmp[1]];
- for (let idx of randIndexes.concat(randIndexes_tmp)
- .sort((a,b) => { return b-a; })) //largest indices first
- {
+ for (let idx of randIndexes.concat(randIndexes_tmp).sort((a, b) => {
+ return b - a;
+ })) {
+ // Largest indices first
positions.splice(idx, 1);
}
let kingPos = positions[1];
let rook2Pos = positions[2];
- pieces[c][rook1Pos] = 'r';
- pieces[c][knight1Pos] = 'n';
- pieces[c][bishop1Pos] = 'b';
- pieces[c][queenPos] = 'q';
- pieces[c][camel1Pos] = 'c';
- pieces[c][camel2Pos] = 'c';
- pieces[c][wildebeestPos] = 'w';
- pieces[c][kingPos] = 'k';
- pieces[c][bishop2Pos] = 'b';
- pieces[c][knight2Pos] = 'n';
- pieces[c][rook2Pos] = 'r';
+ pieces[c][rook1Pos] = "r";
+ pieces[c][knight1Pos] = "n";
+ pieces[c][bishop1Pos] = "b";
+ pieces[c][queenPos] = "q";
+ pieces[c][camel1Pos] = "c";
+ pieces[c][camel2Pos] = "c";
+ pieces[c][wildebeestPos] = "w";
+ pieces[c][kingPos] = "k";
+ pieces[c][bishop2Pos] = "b";
+ pieces[c][knight2Pos] = "n";
+ pieces[c][rook2Pos] = "r";
+ flags += V.CoordToColumn(rook1Pos) + V.CoordToColumn(rook2Pos);
}
- return pieces["b"].join("") +
- "/ppppppppppp/11/11/11/11/11/11/PPPPPPPPPPP/" +
+ return (
+ pieces["b"].join("") +
+ "/ppppppppppp/92/92/92/92/92/92/PPPPPPPPPPP/" +
pieces["w"].join("").toUpperCase() +
- " w 0 1111 -";
+ " w 0 " + flags + " -"
+ );
}
-}
+
+};
projects / vchess.git / blobdiff