| 1 | import { ChessRules, Move, PiPo } from "@/base_rules"; |
| 2 | import { ArrayFun } from "@/utils/array"; |
| 3 | import { randInt, sample } from "@/utils/alea"; |
| 4 | |
| 5 | export class CoregalRules extends ChessRules { |
| 6 | |
| 7 | // TODO: special symbol (l) for royal queen... |
| 8 | |
| 9 | getPPpath(m) { |
| 10 | if ( |
| 11 | m.vanish.length == 2 && |
| 12 | m.appear.length == 2 && |
| 13 | m.vanish[0].p == V.QUEEN |
| 14 | ) { |
| 15 | // Large castle: show castle symbol |
| 16 | return "Coregal/castle"; |
| 17 | } |
| 18 | return super.getPPpath(m); |
| 19 | } |
| 20 | |
| 21 | genRandInitBaseFen() { |
| 22 | const s = FenUtil.setupPieces( |
| 23 | ['r', 'n', 'b', 'l', 'k', 'b', 'n', 'r'], |
| 24 | { |
| 25 | randomness: this.options["randomness"], |
| 26 | between: [{p1: 'k', p2: 'r'}, {p1: 'l', p2: 'r'}], |
| 27 | diffCol: ['b'], |
| 28 | flags: ['r', 'k', 'l'] |
| 29 | } |
| 30 | ); |
| 31 | return { |
| 32 | fen: s.b.join("") + "/pppppppp/8/8/8/8/PPPPPPPP/" + |
| 33 | s.w.join("").toUpperCase(), |
| 34 | o: {flags: s.flags} |
| 35 | }; |
| 36 | } |
| 37 | |
| 38 | pieces() { |
| 39 | let res = super.pieces(); |
| 40 | res['l'] = {...}; |
| 41 | return res; |
| 42 | } |
| 43 | |
| 44 | setFlags(fenflags) { |
| 45 | // white pieces positions, then black pieces positions |
| 46 | this.castleFlags = { w: [...Array(4)], b: [...Array(4)] }; |
| 47 | for (let i = 0; i < 8; i++) { |
| 48 | this.castleFlags[i < 4 ? "w" : "b"][i % 4] = |
| 49 | parseInt(fenflags.charAt(i), 10); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | getPotentialQueenMoves([x, y]) { |
| 54 | let moves = super.getPotentialQueenMoves([x, y]); |
| 55 | const c = this.getColor(x, y); |
| 56 | if (this.castleFlags[c].slice(1, 3).includes(y)) |
| 57 | moves = moves.concat(this.getCastleMoves([x, y])); |
| 58 | return moves; |
| 59 | } |
| 60 | |
| 61 | getPotentialKingMoves([x, y]) { |
| 62 | let moves = this.getSlideNJumpMoves( |
| 63 | [x, y], V.steps[V.ROOK].concat(V.steps[V.BISHOP]), 1); |
| 64 | const c = this.getColor(x, y); |
| 65 | if (this.castleFlags[c].slice(1, 3).includes(y)) |
| 66 | moves = moves.concat(this.getCastleMoves([x, y])); |
| 67 | return moves; |
| 68 | } |
| 69 | |
| 70 | getCastleMoves([x, y]) { |
| 71 | // Relative position of the selected piece: left or right ? |
| 72 | // If left: small castle left, large castle right. |
| 73 | // If right: usual situation. |
| 74 | const c = this.getColor(x, y); |
| 75 | const relPos = (this.castleFlags[c][1] == y ? "left" : "right"); |
| 76 | |
| 77 | const finalSquares = [ |
| 78 | relPos == "left" ? [1, 2] : [2, 3], |
| 79 | relPos == "right" ? [6, 5] : [5, 4] |
| 80 | ]; |
| 81 | const saveFlags = JSON.stringify(this.castleFlags[c]); |
| 82 | // Alter flags to follow base_rules semantic |
| 83 | this.castleFlags[c] = [0, 3].map(i => this.castleFlags[c][i]); |
| 84 | const moves = super.getCastleMoves([x, y], finalSquares); |
| 85 | this.castleFlags[c] = JSON.parse(saveFlags); |
| 86 | return moves; |
| 87 | } |
| 88 | |
| 89 | // "twoKings" arg for the similar Twokings variant. |
| 90 | updateCastleFlags(move, piece, twoKings) { |
| 91 | const c = V.GetOppCol(this.turn); |
| 92 | const firstRank = (c == "w" ? V.size.x - 1 : 0); |
| 93 | // Update castling flags if castling pieces moved or were captured |
| 94 | const oppCol = V.GetOppCol(c); |
| 95 | const oppFirstRank = V.size.x - 1 - firstRank; |
| 96 | if (move.start.x == firstRank) { |
| 97 | if (piece == V.KING || (!twoKings && piece == V.QUEEN)) { |
| 98 | if (this.castleFlags[c][1] == move.start.y) |
| 99 | this.castleFlags[c][1] = 8; |
| 100 | else if (this.castleFlags[c][2] == move.start.y) |
| 101 | this.castleFlags[c][2] = 8; |
| 102 | // Else: the flag is already turned off |
| 103 | } |
| 104 | } |
| 105 | else if ( |
| 106 | move.start.x == firstRank && //our rook moves? |
| 107 | [this.castleFlags[c][0], this.castleFlags[c][3]].includes(move.start.y) |
| 108 | ) { |
| 109 | const flagIdx = (move.start.y == this.castleFlags[c][0] ? 0 : 3); |
| 110 | this.castleFlags[c][flagIdx] = 8; |
| 111 | } else if ( |
| 112 | move.end.x == oppFirstRank && //we took opponent rook? |
| 113 | [this.castleFlags[oppCol][0], this.castleFlags[oppCol][3]] |
| 114 | .includes(move.end.y) |
| 115 | ) { |
| 116 | const flagIdx = (move.end.y == this.castleFlags[oppCol][0] ? 0 : 3); |
| 117 | this.castleFlags[oppCol][flagIdx] = 8; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | }; |