+++ /dev/null
-class WildebeestRules extends ChessRules
-{
- static getPpath(b)
- {
- return ([V.CAMEL,V.WILDEBEEST].includes(b[1]) ? "Wildebeest/" : "") + b;
- }
-
- static get size() { return {x:10,y:11}; }
-
- static get CAMEL() { return 'c'; }
- static get WILDEBEEST() { return 'w'; }
-
- static get PIECES()
- {
- return ChessRules.PIECES.concat([V.CAMEL,V.WILDEBEEST]);
- }
-
- 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] ]}
- );
- }
-
- 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;
- }
- }
- return true;
- }
-
- // There may be 2 enPassant squares (if pawn jump 3 squares)
- getEnpassantFen()
- {
- const L = this.epSquares.length;
- if (!this.epSquares[L-1])
- return "-"; //no en-passant
- let res = "";
- this.epSquares[L-1].forEach(sq => {
- res += V.CoordsToSquare(sq) + ",";
- });
- 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")
- {
- const square = moveOrSquare;
- if (square == "-")
- return undefined;
- let res = [];
- square.split(",").forEach(sq => {
- res.push(V.SquareToCoords(sq));
- });
- return res;
- }
- // 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
- {
- res.push({
- x: sx + 2*step,
- y: sy
- });
- }
- return res;
- }
- return undefined; //default
- }
-
- getPotentialMovesFrom([x,y])
- {
- switch (this.getPiece(x,y))
- {
- case V.CAMEL:
- return this.getPotentialCamelMoves([x,y]);
- case V.WILDEBEEST:
- return this.getPotentialWildebeestMoves([x,y]);
- default:
- return super.getPotentialMovesFrom([x,y])
- }
- }
-
- // Pawns jump 2 or 3 squares, and promote to queen or wildebeest
- 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)
- {
- // 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)
- {
- // 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)
- {
- // Three squares jump
- 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}));
- }
- }
- }
-
- // En passant
- const Lep = this.epSquares.length;
- 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]);
- // 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);
- enpassantMove.vanish.push({
- x: px,
- y: epsq.y,
- p: 'p',
- c: this.getColor(px,epsq.y)
- });
- moves.push(enpassantMove);
- }
- }
- }
-
- return moves;
- }
-
- // TODO: wildebeest castle
-
- getPotentialCamelMoves(sq)
- {
- return this.getSlideNJumpMoves(sq, V.steps[V.CAMEL], "oneStep");
- }
-
- getPotentialWildebeestMoves(sq)
- {
- return this.getSlideNJumpMoves(
- 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);
- }
-
- isAttackedByCamel(sq, colors)
- {
- return this.isAttackedBySlideNJump(sq, colors,
- V.CAMEL, V.steps[V.CAMEL], "oneStep");
- }
-
- isAttackedByWildebeest(sq, colors)
- {
- return this.isAttackedBySlideNJump(sq, colors, V.WILDEBEEST,
- V.steps[V.KNIGHT].concat(V.steps[V.CAMEL]), "oneStep");
- }
-
- checkGameEnd()
- {
- // No valid move: game is lost (stalemate is a win)
- return this.turn == "w" ? "0-1" : "1-0";
- }
-
- static get VALUES() {
- return Object.assign(
- ChessRules.VALUES,
- {'c': 3, 'w': 7} //experimental
- );
- }
-
- static get SEARCH_DEPTH() { return 2; }
-
- static GenRandInitFen()
- {
- let pieces = { "w": new Array(10), "b": new Array(10) };
- for (let c of ["w","b"])
- {
- let positions = _.range(11);
-
- // Get random squares for bishops + camels (different colors)
- let randIndexes = _.sample(_.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(_.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
- {
- positions.splice(idx, 1);
- }
-
- let randIndex = _.random(6);
- let knight1Pos = positions[randIndex];
- positions.splice(randIndex, 1);
- randIndex = _.random(5);
- let knight2Pos = positions[randIndex];
- positions.splice(randIndex, 1);
-
- randIndex = _.random(4);
- let queenPos = positions[randIndex];
- positions.splice(randIndex, 1);
-
- // Random square for wildebeest
- randIndex = _.random(3);
- let wildebeestPos = positions[randIndex];
- positions.splice(randIndex, 1);
-
- let rook1Pos = positions[0];
- 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';
- }
- return pieces["b"].join("") +
- "/ppppppppppp/11/11/11/11/11/11/PPPPPPPPPPP/" +
- pieces["w"].join("").toUpperCase() +
- " w 1111 -";
- }
-}
projects / vchess.git / blobdiff