| 1 | import { ChessRules, PiPo, Move } from "@/base_rules"; |
| 2 | import { ArrayFun} from "@/utils/array"; |
| 3 | |
| 4 | export const VariantRules = class CrazyhouseRules extends ChessRules |
| 5 | { |
| 6 | static IsGoodFen(fen) |
| 7 | { |
| 8 | if (!ChessRules.IsGoodFen(fen)) |
| 9 | return false; |
| 10 | const fenParsed = V.ParseFen(fen); |
| 11 | // 5) Check reserves |
| 12 | if (!fenParsed.reserve || !fenParsed.reserve.match(/^[0-9]{10,10}$/)) |
| 13 | return false; |
| 14 | // 6) Check promoted array |
| 15 | if (!fenParsed.promoted) |
| 16 | return false; |
| 17 | if (fenParsed.promoted == "-") |
| 18 | return true; //no promoted piece on board |
| 19 | const squares = fenParsed.promoted.split(","); |
| 20 | for (let square of squares) |
| 21 | { |
| 22 | const c = V.SquareToCoords(square); |
| 23 | if (c.y < 0 || c.y > V.size.y || isNaN(c.x) || c.x < 0 || c.x > V.size.x) |
| 24 | return false; |
| 25 | } |
| 26 | return true; |
| 27 | } |
| 28 | |
| 29 | static ParseFen(fen) |
| 30 | { |
| 31 | const fenParts = fen.split(" "); |
| 32 | return Object.assign( |
| 33 | ChessRules.ParseFen(fen), |
| 34 | { |
| 35 | reserve: fenParts[5], |
| 36 | promoted: fenParts[6], |
| 37 | } |
| 38 | ); |
| 39 | } |
| 40 | |
| 41 | static GenRandInitFen() |
| 42 | { |
| 43 | return ChessRules.GenRandInitFen() + " 0000000000 -"; |
| 44 | } |
| 45 | |
| 46 | getFen() |
| 47 | { |
| 48 | return super.getFen() + " " + this.getReserveFen() + " " + this.getPromotedFen(); |
| 49 | } |
| 50 | |
| 51 | getReserveFen() |
| 52 | { |
| 53 | let counts = new Array(10); |
| 54 | for (let i=0; i<V.PIECES.length-1; i++) //-1: no king reserve |
| 55 | { |
| 56 | counts[i] = this.reserve["w"][V.PIECES[i]]; |
| 57 | counts[5+i] = this.reserve["b"][V.PIECES[i]]; |
| 58 | } |
| 59 | return counts.join(""); |
| 60 | } |
| 61 | |
| 62 | getPromotedFen() |
| 63 | { |
| 64 | let res = ""; |
| 65 | for (let i=0; i<V.size.x; i++) |
| 66 | { |
| 67 | for (let j=0; j<V.size.y; j++) |
| 68 | { |
| 69 | if (this.promoted[i][j]) |
| 70 | res += V.CoordsToSquare({x:i,y:j}); |
| 71 | } |
| 72 | } |
| 73 | if (res.length > 0) |
| 74 | res = res.slice(0,-1); //remove last comma |
| 75 | else |
| 76 | res = "-"; |
| 77 | return res; |
| 78 | } |
| 79 | |
| 80 | setOtherVariables(fen) |
| 81 | { |
| 82 | super.setOtherVariables(fen); |
| 83 | const fenParsed = V.ParseFen(fen); |
| 84 | // Also init reserves (used by the interface to show landable pieces) |
| 85 | this.reserve = |
| 86 | { |
| 87 | "w": |
| 88 | { |
| 89 | [V.PAWN]: parseInt(fenParsed.reserve[0]), |
| 90 | [V.ROOK]: parseInt(fenParsed.reserve[1]), |
| 91 | [V.KNIGHT]: parseInt(fenParsed.reserve[2]), |
| 92 | [V.BISHOP]: parseInt(fenParsed.reserve[3]), |
| 93 | [V.QUEEN]: parseInt(fenParsed.reserve[4]), |
| 94 | }, |
| 95 | "b": |
| 96 | { |
| 97 | [V.PAWN]: parseInt(fenParsed.reserve[5]), |
| 98 | [V.ROOK]: parseInt(fenParsed.reserve[6]), |
| 99 | [V.KNIGHT]: parseInt(fenParsed.reserve[7]), |
| 100 | [V.BISHOP]: parseInt(fenParsed.reserve[8]), |
| 101 | [V.QUEEN]: parseInt(fenParsed.reserve[9]), |
| 102 | } |
| 103 | }; |
| 104 | this.promoted = ArrayFun.init(V.size.x, V.size.y, false); |
| 105 | if (fenParsed.promoted != "-") |
| 106 | { |
| 107 | for (let square of fenParsed.promoted.split(",")) |
| 108 | { |
| 109 | const [x,y] = V.SquareToCoords(square); |
| 110 | promoted[x][y] = true; |
| 111 | } |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | getColor(i,j) |
| 116 | { |
| 117 | if (i >= V.size.x) |
| 118 | return (i==V.size.x ? "w" : "b"); |
| 119 | return this.board[i][j].charAt(0); |
| 120 | } |
| 121 | |
| 122 | getPiece(i,j) |
| 123 | { |
| 124 | if (i >= V.size.x) |
| 125 | return V.RESERVE_PIECES[j]; |
| 126 | return this.board[i][j].charAt(1); |
| 127 | } |
| 128 | |
| 129 | // Used by the interface: |
| 130 | getReservePpath(color, index) |
| 131 | { |
| 132 | return color + V.RESERVE_PIECES[index]; |
| 133 | } |
| 134 | |
| 135 | // Ordering on reserve pieces |
| 136 | static get RESERVE_PIECES() |
| 137 | { |
| 138 | return [V.PAWN,V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN]; |
| 139 | } |
| 140 | |
| 141 | getReserveMoves([x,y]) |
| 142 | { |
| 143 | const color = this.turn; |
| 144 | const p = V.RESERVE_PIECES[y]; |
| 145 | if (this.reserve[color][p] == 0) |
| 146 | return []; |
| 147 | let moves = []; |
| 148 | const pawnShift = (p==V.PAWN ? 1 : 0); |
| 149 | for (let i=pawnShift; i<V.size.x-pawnShift; i++) |
| 150 | { |
| 151 | for (let j=0; j<V.size.y; j++) |
| 152 | { |
| 153 | if (this.board[i][j] == V.EMPTY) |
| 154 | { |
| 155 | let mv = new Move({ |
| 156 | appear: [ |
| 157 | new PiPo({ |
| 158 | x: i, |
| 159 | y: j, |
| 160 | c: color, |
| 161 | p: p |
| 162 | }) |
| 163 | ], |
| 164 | vanish: [], |
| 165 | start: {x:x, y:y}, //a bit artificial... |
| 166 | end: {x:i, y:j} |
| 167 | }); |
| 168 | moves.push(mv); |
| 169 | } |
| 170 | } |
| 171 | } |
| 172 | return moves; |
| 173 | } |
| 174 | |
| 175 | getPotentialMovesFrom([x,y]) |
| 176 | { |
| 177 | if (x >= V.size.x) |
| 178 | { |
| 179 | // Reserves, outside of board: x == sizeX(+1) |
| 180 | return this.getReserveMoves([x,y]); |
| 181 | } |
| 182 | // Standard moves |
| 183 | return super.getPotentialMovesFrom([x,y]); |
| 184 | } |
| 185 | |
| 186 | getAllValidMoves() |
| 187 | { |
| 188 | let moves = super.getAllValidMoves(); |
| 189 | const color = this.turn; |
| 190 | for (let i=0; i<V.RESERVE_PIECES.length; i++) |
| 191 | moves = moves.concat(this.getReserveMoves([V.size.x+(color=="w"?0:1),i])); |
| 192 | return this.filterValid(moves); |
| 193 | } |
| 194 | |
| 195 | atLeastOneMove() |
| 196 | { |
| 197 | if (!super.atLeastOneMove()) |
| 198 | { |
| 199 | const color = this.turn; |
| 200 | // Search one reserve move |
| 201 | for (let i=0; i<V.RESERVE_PIECES.length; i++) |
| 202 | { |
| 203 | let moves = this.filterValid( |
| 204 | this.getReserveMoves([V.size.x+(this.turn=="w"?0:1), i]) ); |
| 205 | if (moves.length > 0) |
| 206 | return true; |
| 207 | } |
| 208 | return false; |
| 209 | } |
| 210 | return true; |
| 211 | } |
| 212 | |
| 213 | updateVariables(move) |
| 214 | { |
| 215 | super.updateVariables(move); |
| 216 | if (move.vanish.length == 2 && move.appear.length == 2) |
| 217 | return; //skip castle |
| 218 | const color = move.appear[0].c; |
| 219 | if (move.vanish.length == 0) |
| 220 | { |
| 221 | this.reserve[color][move.appear[0].p]--; |
| 222 | return; |
| 223 | } |
| 224 | move.movePromoted = this.promoted[move.start.x][move.start.y]; |
| 225 | move.capturePromoted = this.promoted[move.end.x][move.end.y] |
| 226 | this.promoted[move.start.x][move.start.y] = false; |
| 227 | this.promoted[move.end.x][move.end.y] = move.movePromoted |
| 228 | || (move.vanish[0].p == V.PAWN && move.appear[0].p != V.PAWN); |
| 229 | if (move.capturePromoted) |
| 230 | this.reserve[color][V.PAWN]++; |
| 231 | else if (move.vanish.length == 2) |
| 232 | this.reserve[color][move.vanish[1].p]++; |
| 233 | } |
| 234 | |
| 235 | unupdateVariables(move) |
| 236 | { |
| 237 | super.unupdateVariables(move); |
| 238 | if (move.vanish.length == 2 && move.appear.length == 2) |
| 239 | return; |
| 240 | const color = this.turn; |
| 241 | if (move.vanish.length == 0) |
| 242 | { |
| 243 | this.reserve[color][move.appear[0].p]++; |
| 244 | return; |
| 245 | } |
| 246 | if (move.movePromoted) |
| 247 | this.promoted[move.start.x][move.start.y] = true; |
| 248 | this.promoted[move.end.x][move.end.y] = move.capturePromoted; |
| 249 | if (move.capturePromoted) |
| 250 | this.reserve[color][V.PAWN]--; |
| 251 | else if (move.vanish.length == 2) |
| 252 | this.reserve[color][move.vanish[1].p]--; |
| 253 | } |
| 254 | |
| 255 | static get SEARCH_DEPTH() { return 2; } //high branching factor |
| 256 | |
| 257 | evalPosition() |
| 258 | { |
| 259 | let evaluation = super.evalPosition(); |
| 260 | // Add reserves: |
| 261 | for (let i=0; i<V.RESERVE_PIECES.length; i++) |
| 262 | { |
| 263 | const p = V.RESERVE_PIECES[i]; |
| 264 | evaluation += this.reserve["w"][p] * V.VALUES[p]; |
| 265 | evaluation -= this.reserve["b"][p] * V.VALUES[p]; |
| 266 | } |
| 267 | return evaluation; |
| 268 | } |
| 269 | |
| 270 | getNotation(move) |
| 271 | { |
| 272 | if (move.vanish.length > 0) |
| 273 | return super.getNotation(move); |
| 274 | // Rebirth: |
| 275 | const piece = |
| 276 | (move.appear[0].p != V.PAWN ? move.appear[0].p.toUpperCase() : ""); |
| 277 | return piece + "@" + V.CoordsToSquare(move.end); |
| 278 | } |
| 279 | |
| 280 | getLongNotation(move) |
| 281 | { |
| 282 | if (move.vanish.length > 0) |
| 283 | return super.getLongNotation(move); |
| 284 | return "@" + V.CoordsToSquare(move.end); |
| 285 | } |
| 286 | } |