X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=public%2Fjavascripts%2Fvariants%2FWildebeest.js;fp=public%2Fjavascripts%2Fvariants%2FWildebeest.js;h=5f706cf1904f1fc65248c024a526a4b54c3bcbd9;hb=a37076f1ac8f4c19d9b34a60cbe89df86b88fa0b;hp=0000000000000000000000000000000000000000;hpb=385166a4d682afbdd8e4adc885df9e7a39a5e52f;p=vchess.git diff --git a/public/javascripts/variants/Wildebeest.js b/public/javascripts/variants/Wildebeest.js new file mode 100644 index 00000000..5f706cf1 --- /dev/null +++ b/public/javascripts/variants/Wildebeest.js @@ -0,0 +1,211 @@ +//https://www.chessvariants.com/large.dir/wildebeest.html +class GrandRules extends ChessRules +{ + static getPpath(b) + { + const V = VariantRules; + return ([V.CAMEL,V.WILDEBEEST].includes(b[1]) ? "Wildebeest/" : "") + b; + } + + static get CAMEL() { return 'c'; } + static get WILDEBEEST() { return 'w'; } + + 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] ]} + ); + } + +// TODO: IN epSquares (return array), not return singleton. Easy. Adapt +// just here for now... + getEpSquare(move) + { + const [sx,sy,ex] = [move.start.x,move.start.y,move.end.x]; + if (this.getPiece(sx,sy) == VariantRules.PAWN && Math.abs(sx - ex) == 2) + { + return { + x: (sx + ex)/2, + y: sy + }; + } + return undefined; //default + } + + getPotentialMovesFrom([x,y]) + { + switch (this.getPiece(x,y)) + { + case VariantRules.CAMEL: + return this.getPotentialCamelMoves([x,y]); + case VariantRules.WILDEBEEST: + return this.getPotentialWildebeestMoves([x,y]); + default: + return super.getPotentialMovesFrom([x,y]) + } + } + + // TODO: several changes (promote to queen or wildebeest) + getPotentialPawnMoves([x,y]) + { + const color = this.turn; + let moves = []; + const V = VariantRules; + const [sizeX,sizeY] = VariantRules.size; + const shift = (color == "w" ? -1 : 1); + const firstRank = (color == 'w' ? sizeY-1 : 0); + const startRank = (color == "w" ? sizeY-2 : 1); + const lastRank = (color == "w" ? 0 : sizeY-1); + + if (x+shift >= 0 && x+shift < sizeX && x+shift != lastRank) + { + // Normal moves + if (this.board[x+shift][y] == V.EMPTY) + { + moves.push(this.getBasicMove([x,y], [x+shift,y])); + // Next condition because variants with pawns on 1st rank generally allow them to jump + if ([startRank,firstRank].includes(x) && this.board[x+2*shift][y] == V.EMPTY) + { + // Two squares jump + moves.push(this.getBasicMove([x,y], [x+2*shift,y])); + } + } + // Captures + if (y>0 && this.canTake([x,y], [x+shift,y-1]) && this.board[x+shift][y-1] != V.EMPTY) + moves.push(this.getBasicMove([x,y], [x+shift,y-1])); + if (y { + // Normal move + if (this.board[x+shift][y] == V.EMPTY) + moves.push(this.getBasicMove([x,y], [x+shift,y], {c:color,p:p})); + // Captures + if (y>0 && this.canTake([x,y], [x+shift,y-1]) && this.board[x+shift][y-1] != V.EMPTY) + moves.push(this.getBasicMove([x,y], [x+shift,y-1], {c:color,p:p})); + if (y0 ? this.epSquares[Lep-1] : undefined; + if (!!epSquare && epSquare.x == x+shift && Math.abs(epSquare.y - y) == 1) + { + let epStep = epSquare.y - y; + var enpassantMove = this.getBasicMove([x,y], [x+shift,y+epStep]); + enpassantMove.vanish.push({ + x: x, + y: y+epStep, + p: 'p', + c: this.getColor(x,y+epStep) + }); + moves.push(enpassantMove); + } + + return moves; + } + + getPotentialCamelMoves(sq) + { + return this.getSlideNJumpMoves(sq, VariantRules.steps[VariantRules.CAMEL], "oneStep"); + } + + getPotentialWildebeestMoves(sq) + { + const V = VariantRules; + return this.getSlideNJumpMoves(sq, V.steps[V.KNIGHT].concat(V.steps[V.CAMEL])); + } + + // TODO: getCastleMoves, generalize a bit to include castleSquares as static variables + // ==> but this won't be exactly Wildebeest... think about it. + + // TODO: also generalize lastRank ==> DO NOT HARDCODE 7 !!! + + isAttacked(sq, colors) + { + return (super.isAttacked(sq, colors) + || this.isAttackedByCamel(sq, colors) + || this.isAttackedByWildebeest(sq, colors); + } + + isAttackedByCamel(sq, colors) + { + return this.isAttackedBySlideNJump(sq, colors, + VariantRules.CAMEL, VariantRules.steps[VariantRules.CAMEL]); + } + + isAttackedByWildebeest(sq, colors) + { + const V = VariantRules; + return this.isAttackedBySlideNJump(sq, colors, V.WILDEBEEST, + V.steps[V.KNIGHT].concat(V.steps[V.CAMEL])); + } + + static get VALUES() { + return Object.assign( + ChessRules.VALUES, + {'c': 3, 'w': 7} //experimental + ); + } + + // TODO: + static GenRandInitFen() + { + let pieces = [new Array(8), new Array(8)]; + // Shuffle pieces on first and last rank + for (let c = 0; c <= 1; c++) + { + let positions = _.range(8); + + // Get random squares for bishops + let randIndex = 2 * _.random(3); + let bishop1Pos = positions[randIndex]; + // The second bishop must be on a square of different color + let randIndex_tmp = 2 * _.random(3) + 1; + let bishop2Pos = positions[randIndex_tmp]; + // Remove chosen squares + positions.splice(Math.max(randIndex,randIndex_tmp), 1); + positions.splice(Math.min(randIndex,randIndex_tmp), 1); + + // Get random squares for knights + randIndex = _.random(5); + let knight1Pos = positions[randIndex]; + positions.splice(randIndex, 1); + randIndex = _.random(4); + let knight2Pos = positions[randIndex]; + positions.splice(randIndex, 1); + + // Get random square for queen + randIndex = _.random(3); + let queenPos = positions[randIndex]; + positions.splice(randIndex, 1); + + // Rooks and king positions are now fixed, because of the ordering rook-king-rook + let rook1Pos = positions[0]; + let kingPos = positions[1]; + let rook2Pos = positions[2]; + + // Finally put the shuffled pieces in the board array + pieces[c][rook1Pos] = 'r'; + pieces[c][knight1Pos] = 'n'; + pieces[c][bishop1Pos] = 'b'; + pieces[c][queenPos] = 'q'; + pieces[c][kingPos] = 'k'; + pieces[c][bishop2Pos] = 'b'; + pieces[c][knight2Pos] = 'n'; + pieces[c][rook2Pos] = 'r'; + } + let fen = pieces[0].join("") + + "/pppppppp/8/8/8/8/PPPPPPPP/" + + pieces[1].join("").toUpperCase() + + " 1111"; //add flags + return fen; + } +}