| 1 | import { ChessRules, PiPo, Move } from "@/base_rules"; |
| 2 | |
| 3 | export class ShinobiRules extends ChessRules { |
| 4 | |
| 5 | static get LoseOnRepetition() { |
| 6 | return true; |
| 7 | } |
| 8 | |
| 9 | static get CAPTAIN() { |
| 10 | return 'c'; |
| 11 | } |
| 12 | static get NINJA() { |
| 13 | return 'j'; |
| 14 | } |
| 15 | static get SAMURAI() { |
| 16 | return 's'; |
| 17 | } |
| 18 | static get MONK() { |
| 19 | return 'm'; |
| 20 | } |
| 21 | static get HORSE() { |
| 22 | return 'h'; |
| 23 | } |
| 24 | static get LANCE() { |
| 25 | return 'l'; |
| 26 | } |
| 27 | |
| 28 | static IsGoodFlags(flags) { |
| 29 | // Only black can castle |
| 30 | return !!flags.match(/^[a-z]{2,2}$/); |
| 31 | } |
| 32 | |
| 33 | static get PIECES() { |
| 34 | return ( |
| 35 | ChessRules.PIECES |
| 36 | .concat([V.CAPTAIN, V.NINJA, V.SAMURAI, V.MONK, V.HORSE, V.LANCE]) |
| 37 | ); |
| 38 | } |
| 39 | |
| 40 | getPpath(b) { |
| 41 | if (b[0] == 'b' && b[1] != 'c') return b; |
| 42 | return "Shinobi/" + b; |
| 43 | } |
| 44 | |
| 45 | getReservePpath(index, color) { |
| 46 | return "Shinobi/" + color + V.RESERVE_PIECES[index]; |
| 47 | } |
| 48 | |
| 49 | getFlagsFen() { |
| 50 | return this.castleFlags['b'].map(V.CoordToColumn).join(""); |
| 51 | } |
| 52 | |
| 53 | setFlags(fenflags) { |
| 54 | this.castleFlags = { 'b': [-1, -1] }; |
| 55 | for (let i = 0; i < 2; i++) |
| 56 | this.castleFlags['b'][i] = V.ColumnToCoord(fenflags.charAt(i)); |
| 57 | } |
| 58 | |
| 59 | static IsGoodFen(fen) { |
| 60 | if (!ChessRules.IsGoodFen(fen)) return false; |
| 61 | const fenParsed = V.ParseFen(fen); |
| 62 | // 5) Check reserve |
| 63 | if (!fenParsed.reserve || !fenParsed.reserve.match(/^[0-9]{6,6}$/)) |
| 64 | return false; |
| 65 | return true; |
| 66 | } |
| 67 | |
| 68 | static ParseFen(fen) { |
| 69 | const fenParts = fen.split(" "); |
| 70 | return Object.assign( |
| 71 | ChessRules.ParseFen(fen), |
| 72 | { reserve: fenParts[5] } |
| 73 | ); |
| 74 | } |
| 75 | |
| 76 | // In hand initially: captain, ninja, samurai + 2 x monk, horse, lance. |
| 77 | static GenRandInitFen(randomness) { |
| 78 | const baseFen = ChessRules.GenRandInitFen(Math.min(randomness, 1)); |
| 79 | return ( |
| 80 | baseFen.substr(0, 35) + "3CK3 " + |
| 81 | "w 0 " + baseFen.substr(48, 2) + " - 111222" |
| 82 | ); |
| 83 | } |
| 84 | |
| 85 | getFen() { |
| 86 | return super.getFen() + " " + this.getReserveFen(); |
| 87 | } |
| 88 | |
| 89 | getFenForRepeat() { |
| 90 | return super.getFenForRepeat() + "_" + this.getReserveFen(); |
| 91 | } |
| 92 | |
| 93 | getReserveFen() { |
| 94 | // TODO: can simplify other drops variants with this code: |
| 95 | return Object.values(this.reserve['w']).join(""); |
| 96 | } |
| 97 | |
| 98 | setOtherVariables(fen) { |
| 99 | super.setOtherVariables(fen); |
| 100 | const reserve = |
| 101 | V.ParseFen(fen).reserve.split("").map(x => parseInt(x, 10)); |
| 102 | this.reserve = { |
| 103 | w: { |
| 104 | [V.CAPTAIN]: reserve[0], |
| 105 | [V.NINJA]: reserve[1], |
| 106 | [V.SAMURAI]: reserve[2], |
| 107 | [V.MONK]: reserve[3], |
| 108 | [V.HORSE]: reserve[4], |
| 109 | [V.LANCE]: reserve[5] |
| 110 | } |
| 111 | }; |
| 112 | } |
| 113 | |
| 114 | getColor(i, j) { |
| 115 | if (i >= V.size.x) return 'w'; |
| 116 | return this.board[i][j].charAt(0); |
| 117 | } |
| 118 | |
| 119 | getPiece(i, j) { |
| 120 | if (i >= V.size.x) return V.RESERVE_PIECES[j]; |
| 121 | return this.board[i][j].charAt(1); |
| 122 | } |
| 123 | |
| 124 | static get RESERVE_PIECES() { |
| 125 | return [V.CAPTAIN, V.NINJA, V.SAMURAI, V.MONK, V.HORSE, V.LANCE]; |
| 126 | } |
| 127 | |
| 128 | getReserveMoves([x, y]) { |
| 129 | // color == 'w', no drops for black. |
| 130 | const p = V.RESERVE_PIECES[y]; |
| 131 | if (this.reserve['w'][p] == 0) return []; |
| 132 | let moves = []; |
| 133 | for (let i of [4, 5, 6, 7]) { |
| 134 | for (let j = 0; j < V.size.y; j++) { |
| 135 | if (this.board[i][j] == V.EMPTY) { |
| 136 | let mv = new Move({ |
| 137 | appear: [ |
| 138 | new PiPo({ |
| 139 | x: i, |
| 140 | y: j, |
| 141 | c: 'w', |
| 142 | p: p |
| 143 | }) |
| 144 | ], |
| 145 | vanish: [], |
| 146 | start: { x: x, y: y }, |
| 147 | end: { x: i, y: j } |
| 148 | }); |
| 149 | moves.push(mv); |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | return moves; |
| 154 | } |
| 155 | |
| 156 | static get MapUnpromoted() { |
| 157 | return { |
| 158 | m: 'b', |
| 159 | h: 'n', |
| 160 | l: 'r', |
| 161 | p: 'c' |
| 162 | }; |
| 163 | } |
| 164 | |
| 165 | getPotentialMovesFrom([x, y]) { |
| 166 | if (x >= V.size.x) { |
| 167 | // Reserves, outside of board: x == sizeX(+1) |
| 168 | if (this.turn == 'b') return []; |
| 169 | return this.getReserveMoves([x, y]); |
| 170 | } |
| 171 | // Standard moves |
| 172 | const piece = this.getPiece(x, y); |
| 173 | const sq = [x, y]; |
| 174 | if ([V.ROOK, V.KNIGHT, V.BISHOP, V.QUEEN].includes(piece)) |
| 175 | return super.getPotentialMovesFrom(sq); |
| 176 | switch (piece) { |
| 177 | case V.KING: return this.getPotentialKingMoves(sq); |
| 178 | case V.CAPTAIN: return this.getPotentialCaptainMoves(sq); |
| 179 | case V.NINJA: return this.getPotentialNinjaMoves(sq); |
| 180 | case V.SAMURAI: return this.getPotentialSamuraiMoves(sq); |
| 181 | } |
| 182 | let moves = []; |
| 183 | switch (piece) { |
| 184 | // Unpromoted |
| 185 | case V.PAWN: |
| 186 | moves = super.getPotentialPawnMoves(sq); |
| 187 | break; |
| 188 | case V.MONK: |
| 189 | moves = this.getPotentialMonkMoves(sq); |
| 190 | break; |
| 191 | case V.HORSE: |
| 192 | moves = this.getPotentialHorseMoves(sq); |
| 193 | break; |
| 194 | case V.LANCE: |
| 195 | moves = this.getPotentialLanceMoves(sq); |
| 196 | break; |
| 197 | } |
| 198 | const promotionZone = (this.turn == 'w' ? [0, 1, 2] : [5, 6, 7]); |
| 199 | const promotedForm = V.MapUnpromoted[piece]; |
| 200 | moves.forEach(m => { |
| 201 | if (promotionZone.includes(m.end.x)) m.appear[0].p = promotedForm; |
| 202 | }); |
| 203 | return moves; |
| 204 | } |
| 205 | |
| 206 | getPotentialKingMoves([x, y]) { |
| 207 | if (this.getColor(x, y) == 'b') return super.getPotentialKingMoves([x, y]); |
| 208 | // Clan doesn't castle: |
| 209 | return super.getSlideNJumpMoves( |
| 210 | [x, y], |
| 211 | V.steps[V.ROOK].concat(V.steps[V.BISHOP]), |
| 212 | "oneStep" |
| 213 | ); |
| 214 | } |
| 215 | |
| 216 | getPotentialCaptainMoves(sq) { |
| 217 | const steps = V.steps[V.ROOK].concat(V.steps[V.BISHOP]); |
| 218 | return super.getSlideNJumpMoves(sq, steps, "oneStep"); |
| 219 | } |
| 220 | |
| 221 | getPotentialNinjaMoves(sq) { |
| 222 | return ( |
| 223 | super.getSlideNJumpMoves(sq, V.steps[V.BISHOP]) |
| 224 | .concat(super.getSlideNJumpMoves(sq, V.steps[V.KNIGHT], "oneStep")) |
| 225 | ); |
| 226 | } |
| 227 | |
| 228 | getPotentialSamuraiMoves(sq) { |
| 229 | return ( |
| 230 | super.getSlideNJumpMoves(sq, V.steps[V.ROOK]) |
| 231 | .concat(super.getSlideNJumpMoves(sq, V.steps[V.KNIGHT], "oneStep")) |
| 232 | ); |
| 233 | } |
| 234 | |
| 235 | getPotentialMonkMoves(sq) { |
| 236 | return super.getSlideNJumpMoves(sq, V.steps[V.BISHOP], "oneStep"); |
| 237 | } |
| 238 | |
| 239 | getPotentialHorseMoves(sq) { |
| 240 | return super.getSlideNJumpMoves(sq, [ [-2, 1], [-2, -1] ], "oneStep"); |
| 241 | } |
| 242 | |
| 243 | getPotentialLanceMoves(sq) { |
| 244 | return super.getSlideNJumpMoves(sq, [ [-1, 0] ]); |
| 245 | } |
| 246 | |
| 247 | isAttacked(sq, color) { |
| 248 | if (color == 'b') |
| 249 | return (super.isAttacked(sq, 'b') || this.isAttackedByCaptain(sq, 'b')); |
| 250 | // Attacked by white: |
| 251 | return ( |
| 252 | super.isAttackedByKing(sq, 'w') || |
| 253 | this.isAttackedByCaptain(sq, 'w') || |
| 254 | this.isAttackedByNinja(sq, 'w') || |
| 255 | this.isAttackedBySamurai(sq, 'w') || |
| 256 | this.isAttackedByMonk(sq, 'w') || |
| 257 | this.isAttackedByHorse(sq, 'w') || |
| 258 | this.isAttackedByLance(sq, 'w') || |
| 259 | super.isAttackedByBishop(sq, 'w') || |
| 260 | super.isAttackedByKnight(sq, 'w') || |
| 261 | super.isAttackedByRook(sq, 'w') |
| 262 | ); |
| 263 | } |
| 264 | |
| 265 | isAttackedByCaptain(sq, color) { |
| 266 | const steps = V.steps[V.BISHOP].concat(V.steps[V.ROOK]); |
| 267 | return ( |
| 268 | super.isAttackedBySlideNJump(sq, color, V.CAPTAIN, steps, "oneStep") |
| 269 | ); |
| 270 | } |
| 271 | |
| 272 | isAttackedByNinja(sq, color) { |
| 273 | return ( |
| 274 | super.isAttackedBySlideNJump(sq, color, V.NINJA, V.steps[V.BISHOP]) || |
| 275 | super.isAttackedBySlideNJump( |
| 276 | sq, color, V.NINJA, V.steps[V.KNIGHT], "oneStep") |
| 277 | ); |
| 278 | } |
| 279 | |
| 280 | isAttackedBySamurai(sq, color) { |
| 281 | return ( |
| 282 | super.isAttackedBySlideNJump(sq, color, V.SAMURAI, V.steps[V.ROOK]) || |
| 283 | super.isAttackedBySlideNJump( |
| 284 | sq, color, V.SAMURAI, V.steps[V.KNIGHT], "oneStep") |
| 285 | ); |
| 286 | } |
| 287 | |
| 288 | isAttackedByMonk(sq, color) { |
| 289 | return ( |
| 290 | super.isAttackedBySlideNJump( |
| 291 | sq, color, V.MONK, V.steps[V.BISHOP], "oneStep") |
| 292 | ); |
| 293 | } |
| 294 | |
| 295 | isAttackedByHorse(sq, color) { |
| 296 | return ( |
| 297 | super.isAttackedBySlideNJump( |
| 298 | sq, color, V.HORSE, [ [2, 1], [2, -1] ], "oneStep") |
| 299 | ); |
| 300 | } |
| 301 | |
| 302 | isAttackedByLance(sq, color) { |
| 303 | return super.isAttackedBySlideNJump(sq, color, V.LANCE, [ [1, 0] ]); |
| 304 | } |
| 305 | |
| 306 | getAllValidMoves() { |
| 307 | let moves = super.getAllPotentialMoves(); |
| 308 | if (this.turn == 'w') { |
| 309 | for (let i = 0; i < V.RESERVE_PIECES.length; i++) { |
| 310 | moves = moves.concat( |
| 311 | this.getReserveMoves([V.size.x, i]) |
| 312 | ); |
| 313 | } |
| 314 | } |
| 315 | return this.filterValid(moves); |
| 316 | } |
| 317 | |
| 318 | atLeastOneMove() { |
| 319 | if (super.atLeastOneMove()) return true; |
| 320 | if (this.turn == 'w') { |
| 321 | // Search one reserve move |
| 322 | for (let i = 0; i < V.RESERVE_PIECES.length; i++) { |
| 323 | let moves = this.filterValid( |
| 324 | this.getReserveMoves([V.size.x, i]) |
| 325 | ); |
| 326 | if (moves.length > 0) return true; |
| 327 | } |
| 328 | } |
| 329 | return false; |
| 330 | } |
| 331 | |
| 332 | updateCastleFlags(move, piece) { |
| 333 | // Only black can castle: |
| 334 | const firstRank = 0; |
| 335 | if (piece == V.KING && move.appear[0].c == 'b') |
| 336 | this.castleFlags['b'] = [8, 8]; |
| 337 | else if ( |
| 338 | move.start.x == firstRank && |
| 339 | this.castleFlags['b'].includes(move.start.y) |
| 340 | ) { |
| 341 | const flagIdx = (move.start.y == this.castleFlags['b'][0] ? 0 : 1); |
| 342 | this.castleFlags['b'][flagIdx] = 8; |
| 343 | } |
| 344 | else if ( |
| 345 | move.end.x == firstRank && |
| 346 | this.castleFlags['b'].includes(move.end.y) |
| 347 | ) { |
| 348 | const flagIdx = (move.end.y == this.castleFlags['b'][0] ? 0 : 1); |
| 349 | this.castleFlags['b'][flagIdx] = 8; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | postPlay(move) { |
| 354 | super.postPlay(move); |
| 355 | // Skip castle: |
| 356 | if (move.vanish.length == 2 && move.appear.length == 2) return; |
| 357 | const color = move.appear[0].c; |
| 358 | if (move.vanish.length == 0) this.reserve[color][move.appear[0].p]--; |
| 359 | } |
| 360 | |
| 361 | postUndo(move) { |
| 362 | super.postUndo(move); |
| 363 | if (move.vanish.length == 2 && move.appear.length == 2) return; |
| 364 | const color = this.turn; |
| 365 | if (move.vanish.length == 0) this.reserve[color][move.appear[0].p]++; |
| 366 | } |
| 367 | |
| 368 | static get SEARCH_DEPTH() { |
| 369 | return 2; |
| 370 | } |
| 371 | |
| 372 | getCurrentScore() { |
| 373 | const color = this.turn; |
| 374 | const nodrawResult = (color == "w" ? "0-1" : "1-0"); |
| 375 | const oppLastRank = (color == 'w' ? 7 : 0); |
| 376 | if (this.kingPos[V.GetOppCol(color)][0] == oppLastRank) |
| 377 | return nodrawResult; |
| 378 | if (this.atLeastOneMove()) return "*"; |
| 379 | return nodrawResult; |
| 380 | } |
| 381 | |
| 382 | static get VALUES() { |
| 383 | return ( |
| 384 | Object.assign( |
| 385 | { |
| 386 | c: 4, |
| 387 | j: 7, |
| 388 | s: 8, |
| 389 | m: 2, |
| 390 | h: 2, |
| 391 | l: 2 |
| 392 | }, |
| 393 | ChessRules.VALUES |
| 394 | ) |
| 395 | ); |
| 396 | } |
| 397 | |
| 398 | evalPosition() { |
| 399 | let evaluation = super.evalPosition(); |
| 400 | // Add reserve: |
| 401 | for (let i = 0; i < V.RESERVE_PIECES.length; i++) { |
| 402 | const p = V.RESERVE_PIECES[i]; |
| 403 | evaluation += this.reserve["w"][p] * V.VALUES[p]; |
| 404 | } |
| 405 | return evaluation; |
| 406 | } |
| 407 | |
| 408 | getNotation(move) { |
| 409 | if (move.vanish.length > 0) return super.getNotation(move); |
| 410 | // Drop: |
| 411 | const piece = |
| 412 | move.appear[0].p != V.PAWN ? move.appear[0].p.toUpperCase() : ""; |
| 413 | return piece + "@" + V.CoordsToSquare(move.end); |
| 414 | } |
| 415 | |
| 416 | }; |