| 1 | import { ChessRules } from "@/base_rules"; |
| 2 | import { ArrayFun } from "@/utils/array"; |
| 3 | import { randInt } from "@/utils/alea"; |
| 4 | |
| 5 | export class PerfectRules extends ChessRules { |
| 6 | |
| 7 | static get PawnSpecs() { |
| 8 | return Object.assign( |
| 9 | {}, |
| 10 | ChessRules.PawnSpecs, |
| 11 | { |
| 12 | promotions: |
| 13 | ChessRules.PawnSpecs.promotions |
| 14 | .concat([V.AMAZON, V.EMPRESS, V.PRINCESS]) |
| 15 | } |
| 16 | ); |
| 17 | } |
| 18 | |
| 19 | getPpath(b) { |
| 20 | return ( |
| 21 | [V.AMAZON, V.EMPRESS, V.PRINCESS].includes(b[1]) |
| 22 | ? "Perfect/" |
| 23 | : "" |
| 24 | ) + b; |
| 25 | } |
| 26 | |
| 27 | // Queen + knight |
| 28 | static get AMAZON() { |
| 29 | return "a"; |
| 30 | } |
| 31 | |
| 32 | // Rook + knight |
| 33 | static get EMPRESS() { |
| 34 | return "e"; |
| 35 | } |
| 36 | |
| 37 | // Bishop + knight |
| 38 | static get PRINCESS() { |
| 39 | return "s"; |
| 40 | } |
| 41 | |
| 42 | static get PIECES() { |
| 43 | return ChessRules.PIECES.concat([V.AMAZON, V.EMPRESS, V.PRINCESS]); |
| 44 | } |
| 45 | |
| 46 | getPotentialMovesFrom([x, y]) { |
| 47 | switch (this.getPiece(x, y)) { |
| 48 | case V.AMAZON: |
| 49 | return this.getPotentialAmazonMoves([x, y]); |
| 50 | case V.EMPRESS: |
| 51 | return this.getPotentialEmpressMoves([x, y]); |
| 52 | case V.PRINCESS: |
| 53 | return this.getPotentialPrincessMoves([x, y]); |
| 54 | default: |
| 55 | return super.getPotentialMovesFrom([x, y]); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | getPotentialAmazonMoves(sq) { |
| 60 | return super.getPotentialQueenMoves(sq).concat( |
| 61 | this.getSlideNJumpMoves(sq, V.steps[V.KNIGHT], "oneStep") |
| 62 | ); |
| 63 | } |
| 64 | |
| 65 | getPotentialEmpressMoves(sq) { |
| 66 | return this.getSlideNJumpMoves(sq, V.steps[V.ROOK]).concat( |
| 67 | this.getSlideNJumpMoves(sq, V.steps[V.KNIGHT], "oneStep") |
| 68 | ); |
| 69 | } |
| 70 | |
| 71 | getPotentialPrincessMoves(sq) { |
| 72 | return this.getSlideNJumpMoves(sq, V.steps[V.BISHOP]).concat( |
| 73 | this.getSlideNJumpMoves(sq, V.steps[V.KNIGHT], "oneStep") |
| 74 | ); |
| 75 | } |
| 76 | |
| 77 | isAttacked(sq, color) { |
| 78 | return ( |
| 79 | super.isAttacked(sq, color) || |
| 80 | this.isAttackedByAmazon(sq, color) || |
| 81 | this.isAttackedByEmpress(sq, color) || |
| 82 | this.isAttackedByPrincess(sq, color) |
| 83 | ); |
| 84 | } |
| 85 | |
| 86 | isAttackedByAmazon(sq, color) { |
| 87 | return ( |
| 88 | this.isAttackedBySlideNJump(sq, color, V.AMAZON, V.steps[V.BISHOP]) || |
| 89 | this.isAttackedBySlideNJump(sq, color, V.AMAZON, V.steps[V.ROOK]) || |
| 90 | this.isAttackedBySlideNJump( |
| 91 | sq, |
| 92 | color, |
| 93 | V.AMAZON, |
| 94 | V.steps[V.KNIGHT], |
| 95 | "oneStep" |
| 96 | ) |
| 97 | ); |
| 98 | } |
| 99 | |
| 100 | isAttackedByEmpress(sq, color) { |
| 101 | return ( |
| 102 | this.isAttackedBySlideNJump(sq, color, V.EMPRESS, V.steps[V.ROOK]) || |
| 103 | this.isAttackedBySlideNJump( |
| 104 | sq, |
| 105 | color, |
| 106 | V.EMPRESS, |
| 107 | V.steps[V.KNIGHT], |
| 108 | "oneStep" |
| 109 | ) |
| 110 | ); |
| 111 | } |
| 112 | |
| 113 | isAttackedByPrincess(sq, color) { |
| 114 | return ( |
| 115 | this.isAttackedBySlideNJump(sq, color, V.PRINCESS, V.steps[V.BISHOP]) || |
| 116 | this.isAttackedBySlideNJump( |
| 117 | sq, |
| 118 | color, |
| 119 | V.PRINCESS, |
| 120 | V.steps[V.KNIGHT], |
| 121 | "oneStep" |
| 122 | ) |
| 123 | ); |
| 124 | } |
| 125 | |
| 126 | static get VALUES() { |
| 127 | return Object.assign( |
| 128 | { a: 12, e: 7, s: 5 }, //experimental |
| 129 | ChessRules.VALUES |
| 130 | ); |
| 131 | } |
| 132 | |
| 133 | static get SEARCH_DEPTH() { |
| 134 | return 2; |
| 135 | } |
| 136 | |
| 137 | static GenRandInitFen(randomness) { |
| 138 | if (randomness == 0) |
| 139 | return "esqakbnr/pppppppp/8/8/8/8/PPPPPPPP/ESQAKBNR w 0 ahah -"; |
| 140 | |
| 141 | let pieces = { w: new Array(8), b: new Array(8) }; |
| 142 | let flags = ""; |
| 143 | let whiteBishopPos = -1; |
| 144 | for (let c of ["w", "b"]) { |
| 145 | if (c == 'b' && randomness == 1) { |
| 146 | pieces['b'] = pieces['w']; |
| 147 | flags += flags; |
| 148 | break; |
| 149 | } |
| 150 | |
| 151 | let positions = ArrayFun.range(8); |
| 152 | |
| 153 | // Get random squares for bishop: if black, pick a different color |
| 154 | // than where the white one stands. |
| 155 | let randIndex = |
| 156 | c == 'w' |
| 157 | ? randInt(8) |
| 158 | : 2 * randInt(4) + (1 - whiteBishopPos % 2); |
| 159 | if (c == 'w') whiteBishopPos = randIndex; |
| 160 | const bishopPos = positions[randIndex]; |
| 161 | positions.splice(randIndex, 1); |
| 162 | |
| 163 | randIndex = randInt(7); |
| 164 | const knightPos = positions[randIndex]; |
| 165 | positions.splice(randIndex, 1); |
| 166 | |
| 167 | randIndex = randInt(6); |
| 168 | const queenPos = positions[randIndex]; |
| 169 | positions.splice(randIndex, 1); |
| 170 | |
| 171 | randIndex = randInt(5); |
| 172 | const amazonPos = positions[randIndex]; |
| 173 | positions.splice(randIndex, 1); |
| 174 | |
| 175 | randIndex = randInt(4); |
| 176 | const princessPos = positions[randIndex]; |
| 177 | positions.splice(randIndex, 1); |
| 178 | |
| 179 | // Rook, empress and king positions are now almost fixed, |
| 180 | // only the ordering rook->empress or empress->rook must be decided. |
| 181 | let rookPos = positions[0]; |
| 182 | let empressPos = positions[2]; |
| 183 | const kingPos = positions[1]; |
| 184 | flags += V.CoordToColumn(rookPos) + V.CoordToColumn(empressPos); |
| 185 | if (Math.random() < 0.5) [rookPos, empressPos] = [empressPos, rookPos]; |
| 186 | |
| 187 | pieces[c][rookPos] = "r"; |
| 188 | pieces[c][knightPos] = "n"; |
| 189 | pieces[c][bishopPos] = "b"; |
| 190 | pieces[c][queenPos] = "q"; |
| 191 | pieces[c][kingPos] = "k"; |
| 192 | pieces[c][amazonPos] = "a"; |
| 193 | pieces[c][princessPos] = "s"; |
| 194 | pieces[c][empressPos] = "e"; |
| 195 | } |
| 196 | // Add turn + flags + enpassant |
| 197 | return ( |
| 198 | pieces["b"].join("") + |
| 199 | "/pppppppp/8/8/8/8/PPPPPPPP/" + |
| 200 | pieces["w"].join("").toUpperCase() + |
| 201 | " w 0 " + flags + " -" |
| 202 | ); |
| 203 | } |
| 204 | |
| 205 | }; |