| 1 | import { ChessRules, Move, PiPo } from "@/base_rules"; |
| 2 | |
| 3 | export class YoteRules extends ChessRules { |
| 4 | |
| 5 | static get HasFlags() { |
| 6 | return false; |
| 7 | } |
| 8 | |
| 9 | static get HasEnpassant() { |
| 10 | return false; |
| 11 | } |
| 12 | |
| 13 | static get Monochrome() { |
| 14 | return true; |
| 15 | } |
| 16 | |
| 17 | static get Notoodark() { |
| 18 | return true; |
| 19 | } |
| 20 | |
| 21 | static get ReverseColors() { |
| 22 | return true; |
| 23 | } |
| 24 | |
| 25 | static IsGoodFen(fen) { |
| 26 | if (!ChessRules.IsGoodFen(fen)) return false; |
| 27 | const fenParsed = V.ParseFen(fen); |
| 28 | // 3) Check reserves |
| 29 | if ( |
| 30 | !fenParsed.reserve || |
| 31 | !fenParsed.reserve.match(/^([0-9]{1,2},){2,2}$/) |
| 32 | ) { |
| 33 | return false; |
| 34 | } |
| 35 | // 4) Check lastMove |
| 36 | if (!fenParsed.lastMove) return false; |
| 37 | const lmParts = fenParsed.lastMove.split(","); |
| 38 | for (lp of lmParts) { |
| 39 | if (lp != "-" && !lp.match(/^([a-f][1-5]){2,2}$/)) return false; |
| 40 | } |
| 41 | return true; |
| 42 | } |
| 43 | |
| 44 | static ParseFen(fen) { |
| 45 | const fenParts = fen.split(" "); |
| 46 | return Object.assign( |
| 47 | ChessRules.ParseFen(fen), |
| 48 | { |
| 49 | reserve: fenParts[3], |
| 50 | lastMove: fenParts[4] |
| 51 | } |
| 52 | ); |
| 53 | } |
| 54 | |
| 55 | static GenRandInitFen(randomness) { |
| 56 | return "6/6/6/6/6 w 0 12,12 -,-"; |
| 57 | } |
| 58 | |
| 59 | getFen() { |
| 60 | return ( |
| 61 | super.getFen() + " " + |
| 62 | this.getReserveFen() + " " + |
| 63 | this.getLastmoveFen() |
| 64 | ); |
| 65 | } |
| 66 | |
| 67 | getFenForRepeat() { |
| 68 | return super.getFenForRepeat() + "_" + this.getReserveFen(); |
| 69 | } |
| 70 | |
| 71 | getReserveFen() { |
| 72 | return ( |
| 73 | (!this.reserve["w"] ? 0 : this.reserve["w"][V.PAWN]) + "," + |
| 74 | (!this.reserve["b"] ? 0 : this.reserve["b"][V.PAWN]) |
| 75 | ); |
| 76 | } |
| 77 | |
| 78 | getLastmoveFen() { |
| 79 | const L = this.lastMove.length; |
| 80 | const lm = this.lastMove[L-1]; |
| 81 | return ( |
| 82 | ( |
| 83 | !lm['w'] |
| 84 | ? '-' |
| 85 | : V.CoordsToSquare(lm['w'].start) + V.CoordsToSquare(lm['w'].end) |
| 86 | ) |
| 87 | + "," + |
| 88 | ( |
| 89 | !lm['b'] |
| 90 | ? '-' |
| 91 | : V.CoordsToSquare(lm['b'].start) + V.CoordsToSquare(lm['b'].end) |
| 92 | ) |
| 93 | ); |
| 94 | } |
| 95 | |
| 96 | setOtherVariables(fen) { |
| 97 | const fenParsed = V.ParseFen(fen); |
| 98 | const reserve = fenParsed.reserve.split(",").map(x => parseInt(x, 10)); |
| 99 | this.reserve = { |
| 100 | w: { [V.PAWN]: reserve[0] }, |
| 101 | b: { [V.PAWN]: reserve[1] } |
| 102 | }; |
| 103 | // And last moves (to avoid undoing your last move) |
| 104 | const lmParts = fenParsed.lastMove.split(","); |
| 105 | this.lastMove = [{ w: null, b: null }]; |
| 106 | ['w', 'b'].forEach((c, i) => { |
| 107 | if (lmParts[i] != '-') { |
| 108 | this.lastMove[0][c] = { |
| 109 | start: V.SquareToCoords(lmParts[i].substr(0, 2)), |
| 110 | end: V.SquareToCoords(lmParts[i].substr(2)) |
| 111 | }; |
| 112 | } |
| 113 | }); |
| 114 | // Local stack to know if (current) last move captured something |
| 115 | this.captures = [false]; |
| 116 | } |
| 117 | |
| 118 | static get size() { |
| 119 | return { x: 5, y: 6 }; |
| 120 | } |
| 121 | |
| 122 | static get PIECES() { |
| 123 | return [V.PAWN]; |
| 124 | } |
| 125 | |
| 126 | getColor(i, j) { |
| 127 | if (i >= V.size.x) return i == V.size.x ? "w" : "b"; |
| 128 | return this.board[i][j].charAt(0); |
| 129 | } |
| 130 | |
| 131 | getPiece() { |
| 132 | return V.PAWN; |
| 133 | } |
| 134 | |
| 135 | getPpath(b) { |
| 136 | return "Yote/" + b; |
| 137 | } |
| 138 | |
| 139 | getReservePpath(index, color) { |
| 140 | return "Yote/" + color + V.PAWN; |
| 141 | } |
| 142 | |
| 143 | static get RESERVE_PIECES() { |
| 144 | return [V.PAWN]; |
| 145 | } |
| 146 | |
| 147 | canIplay(side, [x, y]) { |
| 148 | if (this.turn != side) return false; |
| 149 | const L = this.captures.length; |
| 150 | if (!this.captures[L-1]) return this.getColor(x, y) == side; |
| 151 | return (x < V.size.x && this.getColor(x, y) != side); |
| 152 | } |
| 153 | |
| 154 | hoverHighlight(x, y) { |
| 155 | const L = this.captures.length; |
| 156 | if (!this.captures[L-1]) return false; |
| 157 | const oppCol = V.GetOppCol(this.turn); |
| 158 | return (this.board[x][y] != V.EMPTY && this.getColor(x, y) == oppCol); |
| 159 | } |
| 160 | |
| 161 | // TODO: onlyClick() doesn't fulfill exactly its role. |
| 162 | // Seems that there is some lag... TOFIX |
| 163 | onlyClick([x, y]) { |
| 164 | const L = this.captures.length; |
| 165 | return (this.captures[L-1] && this.getColor(x, y) != this.turn); |
| 166 | } |
| 167 | |
| 168 | // PATCH related to above TO-DO: |
| 169 | getPossibleMovesFrom([x, y]) { |
| 170 | if (x < V.size.x && this.board[x][y] == V.EMPTY) return []; |
| 171 | return super.getPossibleMovesFrom([x, y]); |
| 172 | } |
| 173 | |
| 174 | doClick([x, y]) { |
| 175 | const L = this.captures.length; |
| 176 | if (!this.captures[L-1]) return null; |
| 177 | const oppCol = V.GetOppCol(this.turn); |
| 178 | if (this.board[x][y] == V.EMPTY || this.getColor(x, y) != oppCol) |
| 179 | return null; |
| 180 | return new Move({ |
| 181 | appear: [], |
| 182 | vanish: [ new PiPo({ x: x, y: y, c: oppCol, p: V.PAWN }) ], |
| 183 | end: { x: x, y: y } |
| 184 | }); |
| 185 | } |
| 186 | |
| 187 | getReserveMoves(x) { |
| 188 | const color = this.turn; |
| 189 | if (this.reserve[color][V.PAWN] == 0) return []; |
| 190 | let moves = []; |
| 191 | for (let i = 0; i < V.size.x; i++) { |
| 192 | for (let j = 0; j < V.size.y; j++) { |
| 193 | if (this.board[i][j] == V.EMPTY) { |
| 194 | let mv = new Move({ |
| 195 | appear: [ |
| 196 | new PiPo({ |
| 197 | x: i, |
| 198 | y: j, |
| 199 | c: color, |
| 200 | p: V.PAWN |
| 201 | }) |
| 202 | ], |
| 203 | vanish: [], |
| 204 | start: { x: x, y: 0 }, //a bit artificial... |
| 205 | end: { x: i, y: j } |
| 206 | }); |
| 207 | moves.push(mv); |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | return moves; |
| 212 | } |
| 213 | |
| 214 | getPotentialMovesFrom([x, y]) { |
| 215 | const L = this.captures.length; |
| 216 | if (this.captures[L-1]) { |
| 217 | if (x >= V.size.x) return []; |
| 218 | const mv = this.doClick([x, y]); |
| 219 | return (!!mv ? [mv] : []); |
| 220 | } |
| 221 | if (x >= V.size.x) |
| 222 | return this.getReserveMoves([x, y]); |
| 223 | return this.getPotentialPawnMoves([x, y]); |
| 224 | } |
| 225 | |
| 226 | getPotentialPawnMoves([x, y]) { |
| 227 | let moves = []; |
| 228 | const color = this.turn; |
| 229 | const L = this.lastMove.length; |
| 230 | const lm = this.lastMove[L-1]; |
| 231 | let forbiddenStep = null; |
| 232 | if (!!lm[color]) { |
| 233 | forbiddenStep = [ |
| 234 | lm[color].start.x - lm[color].end.x, |
| 235 | lm[color].start.y - lm[color].end.y |
| 236 | ]; |
| 237 | } |
| 238 | const oppCol = V.GetOppCol(color); |
| 239 | for (let s of V.steps[V.ROOK]) { |
| 240 | if ( |
| 241 | !!forbiddenStep && |
| 242 | s[0] == forbiddenStep[0] && s[1] == forbiddenStep[1] |
| 243 | ) { |
| 244 | continue; |
| 245 | } |
| 246 | const [i1, j1] = [x + s[0], y + s[1]]; |
| 247 | if (V.OnBoard(i1, j1)) { |
| 248 | if (this.board[i1][j1] == V.EMPTY) |
| 249 | moves.push(super.getBasicMove([x, y], [i1, j1])); |
| 250 | else if (this.getColor(i1, j1) == oppCol) { |
| 251 | const [i2, j2] = [i1 + s[0], j1 + s[1]]; |
| 252 | if (V.OnBoard(i2, j2) && this.board[i2][j2] == V.EMPTY) { |
| 253 | let mv = new Move({ |
| 254 | appear: [ |
| 255 | new PiPo({ x: i2, y: j2, c: color, p: V.PAWN }) |
| 256 | ], |
| 257 | vanish: [ |
| 258 | new PiPo({ x: x, y: y, c: color, p: V.PAWN }), |
| 259 | new PiPo({ x: i1, y: j1, c: oppCol, p: V.PAWN }) |
| 260 | ] |
| 261 | }); |
| 262 | moves.push(mv); |
| 263 | } |
| 264 | } |
| 265 | } |
| 266 | } |
| 267 | return moves; |
| 268 | } |
| 269 | |
| 270 | getAllPotentialMoves() { |
| 271 | let moves = super.getAllPotentialMoves(); |
| 272 | const color = this.turn; |
| 273 | moves = moves.concat( |
| 274 | this.getReserveMoves(V.size.x + (color == "w" ? 0 : 1))); |
| 275 | return moves; |
| 276 | } |
| 277 | |
| 278 | filterValid(moves) { |
| 279 | return moves; |
| 280 | } |
| 281 | |
| 282 | getCheckSquares() { |
| 283 | return []; |
| 284 | } |
| 285 | |
| 286 | atLeastOneMove() { |
| 287 | if (!super.atLeastOneMove()) { |
| 288 | // Search one reserve move |
| 289 | const moves = |
| 290 | this.getReserveMoves(V.size.x + (this.turn == "w" ? 0 : 1)); |
| 291 | if (moves.length > 0) return true; |
| 292 | return false; |
| 293 | } |
| 294 | return true; |
| 295 | } |
| 296 | |
| 297 | play(move) { |
| 298 | const color = this.turn; |
| 299 | move.turn = color; //for undo |
| 300 | const L = this.lastMove.length; |
| 301 | if (color == 'w') |
| 302 | this.lastMove.push({ w: null, b: this.lastMove[L-1]['b'] }); |
| 303 | if (move.appear.length == move.vanish.length) { //== 1 |
| 304 | // Normal move (non-capturing, non-dropping, non-removal) |
| 305 | let lm = this.lastMove[L - (color == 'w' ? 0 : 1)]; |
| 306 | if (!lm[color]) lm[color] = {}; |
| 307 | lm[color].start = move.start; |
| 308 | lm[color].end = move.end; |
| 309 | } |
| 310 | const oppCol = V.GetOppCol(color); |
| 311 | V.PlayOnBoard(this.board, move); |
| 312 | const captureNotEnding = ( |
| 313 | move.vanish.length == 2 && |
| 314 | this.board.some(b => b.some(cell => cell != "" && cell[0] == oppCol)) |
| 315 | ); |
| 316 | this.captures.push(captureNotEnding); |
| 317 | // Change turn unless I just captured something, |
| 318 | // and an opponent stone can be removed from board. |
| 319 | if (!captureNotEnding) { |
| 320 | this.turn = oppCol; |
| 321 | this.movesCount++; |
| 322 | } |
| 323 | this.postPlay(move); |
| 324 | } |
| 325 | |
| 326 | undo(move) { |
| 327 | V.UndoOnBoard(this.board, move); |
| 328 | if (this.turn == 'b') this.lastMove.pop(); |
| 329 | else this.lastMove['b'] = null; |
| 330 | this.captures.pop(); |
| 331 | if (move.turn != this.turn) { |
| 332 | this.turn = move.turn; |
| 333 | this.movesCount--; |
| 334 | } |
| 335 | this.postUndo(move); |
| 336 | } |
| 337 | |
| 338 | postPlay(move) { |
| 339 | if (move.vanish.length == 0) { |
| 340 | const color = move.appear[0].c; |
| 341 | this.reserve[color][V.PAWN]--; |
| 342 | if (this.reserve[color][V.PAWN] == 0) delete this.reserve[color]; |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | postUndo(move) { |
| 347 | if (move.vanish.length == 0) { |
| 348 | const color = move.appear[0].c; |
| 349 | if (!this.reserve[color]) this.reserve[color] = { [V.PAWN]: 0 }; |
| 350 | this.reserve[color][V.PAWN]++; |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | getCurrentScore() { |
| 355 | if (this.movesCount <= 2) return "*"; |
| 356 | const color = this.turn; |
| 357 | // If no stones on board, or no move available, I lose |
| 358 | if ( |
| 359 | this.board.every(b => { |
| 360 | return b.every(cell => { |
| 361 | return (cell == "" || cell[0] != color); |
| 362 | }); |
| 363 | }) |
| 364 | || |
| 365 | !this.atLeastOneMove() |
| 366 | ) { |
| 367 | return (color == 'w' ? "0-1" : "1-0"); |
| 368 | } |
| 369 | return "*"; |
| 370 | } |
| 371 | |
| 372 | static get SEARCH_DEPTH() { |
| 373 | return 4; |
| 374 | } |
| 375 | |
| 376 | evalPosition() { |
| 377 | let evaluation = super.evalPosition(); |
| 378 | // Add reserves: |
| 379 | evaluation += this.reserve["w"][V.PAWN]; |
| 380 | evaluation -= this.reserve["b"][V.PAWN]; |
| 381 | return evaluation; |
| 382 | } |
| 383 | |
| 384 | getNotation(move) { |
| 385 | if (move.vanish.length == 0) |
| 386 | // Placement: |
| 387 | return "@" + V.CoordsToSquare(move.end); |
| 388 | if (move.appear.length == 0) |
| 389 | // Removal after capture: |
| 390 | return V.CoordsToSquare(move.start) + "X"; |
| 391 | return ( |
| 392 | V.CoordsToSquare(move.start) + |
| 393 | (move.vanish.length == 2 ? "x" : "") + |
| 394 | V.CoordsToSquare(move.end) |
| 395 | ); |
| 396 | } |
| 397 | |
| 398 | }; |