| 1 | class CrazyhouseRules extends ChessRules |
| 2 | { |
| 3 | initVariables(fen) |
| 4 | { |
| 5 | super.initVariables(fen); |
| 6 | // Also init reserves (used by the interface to show landing pieces) |
| 7 | const V = VariantRules; |
| 8 | this.reserve = |
| 9 | { |
| 10 | "w": |
| 11 | { |
| 12 | [V.PAWN]: 0, |
| 13 | [V.ROOK]: 0, |
| 14 | [V.KNIGHT]: 0, |
| 15 | [V.BISHOP]: 0, |
| 16 | [V.QUEEN]: 0, |
| 17 | }, |
| 18 | "b": |
| 19 | { |
| 20 | [V.PAWN]: 0, |
| 21 | [V.ROOK]: 0, |
| 22 | [V.KNIGHT]: 0, |
| 23 | [V.BISHOP]: 0, |
| 24 | [V.QUEEN]: 0, |
| 25 | } |
| 26 | }; |
| 27 | // May be a continuation: adjust numbers of pieces according to captures + rebirths |
| 28 | this.moves.forEach(m => { |
| 29 | if (m.vanish.length == 2) |
| 30 | this.reserve[m.appear[0].c][m.vanish[1].p]++; |
| 31 | else if (m.vanish.length == 0) |
| 32 | this.reserve[m.appear[0].c][m.appear[0].p]--; |
| 33 | }); |
| 34 | } |
| 35 | |
| 36 | // Used by the interface: |
| 37 | getReservePpath(color, index) |
| 38 | { |
| 39 | return color + VariantRules.RESERVE_PIECES[index]; |
| 40 | } |
| 41 | |
| 42 | // Put an ordering on reserve pieces |
| 43 | static get RESERVE_PIECES() { |
| 44 | const V = VariantRules; |
| 45 | return [V.PAWN,V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN]; |
| 46 | } |
| 47 | |
| 48 | getReserveMoves([x,y]) |
| 49 | { |
| 50 | const color = this.turn; |
| 51 | const p = VariantRules.RESERVE_PIECES[y]; |
| 52 | if (this.reserve[color][p] == 0) |
| 53 | return []; |
| 54 | let moves = []; |
| 55 | for (let i=0; i<sizeX; i++) |
| 56 | { |
| 57 | for (let j=0; j<sizeY; j++) |
| 58 | { |
| 59 | if (this.board[i][j] != VariantRules.EMPTY) |
| 60 | { |
| 61 | let mv = new Move({ |
| 62 | appear: [ |
| 63 | new PiPo({ |
| 64 | x: i, |
| 65 | y: j, |
| 66 | c: color, |
| 67 | p: p |
| 68 | }) |
| 69 | ] |
| 70 | }); |
| 71 | moves.push(mv); |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | return moves; |
| 76 | } |
| 77 | |
| 78 | getPotentialMovesFrom([x,y]) |
| 79 | { |
| 80 | const sizeX = VariantRules.size[0]; |
| 81 | if (x < sizeX) |
| 82 | return super.getPotentialMovesFrom([x,y]); |
| 83 | // Reserves, outside of board: x == sizeX |
| 84 | return this.getReserveMoves([x,y]); |
| 85 | } |
| 86 | |
| 87 | getAllValidMoves() |
| 88 | { |
| 89 | let moves = super.getAllValidMoves(); |
| 90 | const color = this.turn; |
| 91 | const sizeX = VariantRules.size[0]; |
| 92 | for (let i=0; i<VariantRules.RESERVE_PIECES.length; i++) |
| 93 | moves = moves.concat(this.getReserveMoves([sizeX,i])); |
| 94 | return this.filterValid(moves); |
| 95 | } |
| 96 | |
| 97 | atLeastOneMove() |
| 98 | { |
| 99 | if (!super.atLeastOneMove()) |
| 100 | { |
| 101 | const sizeX = VariantRules.size[0]; |
| 102 | // Scan for reserve moves |
| 103 | for (let i=0; i<VariantRules.RESERVE_PIECES.length; i++) |
| 104 | { |
| 105 | let moves = this.filterValid(this.getReserveMoves([sizeX,i])); |
| 106 | if (moves.length > 0) |
| 107 | return true; |
| 108 | } |
| 109 | return false; |
| 110 | } |
| 111 | return true; |
| 112 | } |
| 113 | |
| 114 | updateVariables(move) |
| 115 | { |
| 116 | super.updateVariables(move); |
| 117 | const color = this.turn; |
| 118 | if (move.vanish.length==2) |
| 119 | this.reserve[color][move.appear[0].p]++; |
| 120 | if (move.vanish.length==0) |
| 121 | this.reserve[color][move.appear[0].p]--; |
| 122 | } |
| 123 | |
| 124 | unupdateVariables(move) |
| 125 | { |
| 126 | super.unupdateVariables(move); |
| 127 | const color = this.turn; |
| 128 | if (move.vanish.length==2) |
| 129 | this.reserve[color][move.appear[0].p]--; |
| 130 | if (move.vanish.length==0) |
| 131 | this.reserve[color][move.appear[0].p]++; |
| 132 | } |
| 133 | |
| 134 | static get SEARCH_DEPTH() { return 2; } //high branching factor |
| 135 | |
| 136 | getNotation(move) |
| 137 | { |
| 138 | if (move.vanish.length > 0) |
| 139 | return super.getNotation(move); |
| 140 | // Rebirth: |
| 141 | const piece = |
| 142 | (move.appear[0].p != VariantRules.PAWN ? move.appear.p.toUpperCase() : ""); |
| 143 | const finalSquare = |
| 144 | String.fromCharCode(97 + move.end.y) + (VariantRules.size[0]-move.end.x); |
| 145 | return piece + "@" + finalSquare; |
| 146 | } |
| 147 | } |