| 1 | import { ChessRules, Move, PiPo } from "@/base_rules"; |
| 2 | import { randInt } from "@/utils/alea"; |
| 3 | |
| 4 | export class HamiltonRules extends ChessRules { |
| 5 | static get HasFlags() { |
| 6 | return false; |
| 7 | } |
| 8 | |
| 9 | static get HasEnpassant() { |
| 10 | return false; |
| 11 | } |
| 12 | |
| 13 | get showFirstTurn() { |
| 14 | return true; |
| 15 | } |
| 16 | |
| 17 | static get HOLE() { |
| 18 | return "xx"; |
| 19 | } |
| 20 | |
| 21 | hoverHighlight(x, y) { |
| 22 | return this.movesCount == 0; |
| 23 | } |
| 24 | |
| 25 | static board2fen(b) { |
| 26 | if (b[0] == 'x') return 'x'; |
| 27 | return ChessRules.board2fen(b); |
| 28 | } |
| 29 | |
| 30 | static fen2board(f) { |
| 31 | if (f == 'x') return V.HOLE; |
| 32 | return ChessRules.fen2board(f); |
| 33 | } |
| 34 | |
| 35 | getPpath(b) { |
| 36 | if (b[0] == 'x') return "Hamilton/hole"; |
| 37 | return b; |
| 38 | } |
| 39 | |
| 40 | static get PIECES() { |
| 41 | return [ChessRules.KNIGHT]; |
| 42 | } |
| 43 | |
| 44 | static IsGoodPosition(position) { |
| 45 | if (position.length == 0) return false; |
| 46 | const rows = position.split("/"); |
| 47 | if (rows.length != V.size.x) return false; |
| 48 | for (let row of rows) { |
| 49 | let sumElts = 0; |
| 50 | for (let i = 0; i < row.length; i++) { |
| 51 | if (['x'].concat(V.PIECES).includes(row[i].toLowerCase())) sumElts++; |
| 52 | else { |
| 53 | const num = parseInt(row[i], 10); |
| 54 | if (isNaN(num)) return false; |
| 55 | sumElts += num; |
| 56 | } |
| 57 | } |
| 58 | if (sumElts != V.size.y) return false; |
| 59 | } |
| 60 | return true; |
| 61 | } |
| 62 | |
| 63 | static GenRandInitFen() { |
| 64 | return "8/8/8/8/8/8/8/8 w 0"; |
| 65 | } |
| 66 | |
| 67 | canIplay(side, [x, y]) { |
| 68 | return side == this.turn; |
| 69 | } |
| 70 | |
| 71 | // Initiate the game by choosing a square for the knight: |
| 72 | doClick(square) { |
| 73 | if (this.movesCount > 0) return null; |
| 74 | return new Move({ |
| 75 | appear: [ |
| 76 | new PiPo({ x: square[0], y: square[1], c: 'w', p: V.KNIGHT }) |
| 77 | ], |
| 78 | vanish: [], |
| 79 | start: { x: -1, y: -1 } |
| 80 | }); |
| 81 | } |
| 82 | |
| 83 | getAllPotentialMoves() { |
| 84 | if (this.movesCount == 0) { |
| 85 | return [...Array(64).keys()].map(k => { |
| 86 | const i = k % 8; |
| 87 | const j = (k - i) / 8; |
| 88 | return new Move({ |
| 89 | appear: [ |
| 90 | new PiPo({ x: i, y: j, c: 'w', p: V.KNIGHT }) |
| 91 | ], |
| 92 | vanish: [], |
| 93 | start: { x: -1, y: -1 } |
| 94 | }); |
| 95 | }); |
| 96 | } |
| 97 | for (let i=0; i<8; i++) { |
| 98 | for (let j=0; j<8; j++) { |
| 99 | if (!([V.EMPTY, V.HOLE].includes(this.board[i][j]))) |
| 100 | return this.getPotentialKnightMoves([i, j]); |
| 101 | } |
| 102 | } |
| 103 | return []; |
| 104 | } |
| 105 | |
| 106 | getPotentialKnightMoves([x, y]) { |
| 107 | return ( |
| 108 | V.steps[V.KNIGHT].filter( |
| 109 | s => { |
| 110 | const [i, j] = [x + s[0], y + s[1]]; |
| 111 | return (V.OnBoard(i, j) && this.board[i][j] != V.HOLE); |
| 112 | } |
| 113 | ).map(s => { |
| 114 | return this.getBasicMove([x, y], [x + s[0], y + s[1]]); |
| 115 | }) |
| 116 | ); |
| 117 | } |
| 118 | |
| 119 | atLeastOneMove() { |
| 120 | if (this.movesCount == 0) return true; |
| 121 | for (let i=0; i<8; i++) { |
| 122 | for (let j=0; j<8; j++) { |
| 123 | if (!([V.EMPTY, V.HOLE].includes(this.board[i][j]))) |
| 124 | return this.getPotentialKnightMoves([i, j]).length > 0; |
| 125 | } |
| 126 | } |
| 127 | return false; |
| 128 | } |
| 129 | |
| 130 | filterValid(moves) { |
| 131 | return moves; |
| 132 | } |
| 133 | |
| 134 | static PlayOnBoard(board, move) { |
| 135 | if (move.vanish.length > 0) |
| 136 | board[move.vanish[0].x][move.vanish[0].y] = V.HOLE; |
| 137 | for (let psq of move.appear) board[psq.x][psq.y] = psq.c + psq.p; |
| 138 | } |
| 139 | |
| 140 | getCheckSquares() { |
| 141 | return []; |
| 142 | } |
| 143 | |
| 144 | getCurrentScore() { |
| 145 | if (this.atLeastOneMove()) return "*"; |
| 146 | // No valid move: I lose |
| 147 | return this.turn == "w" ? "0-1" : "1-0"; |
| 148 | } |
| 149 | |
| 150 | getComputerMove() { |
| 151 | const moves = this.getAllValidMoves(); |
| 152 | // Just a random mover for now... |
| 153 | return moves[randInt(moves.length)]; |
| 154 | } |
| 155 | |
| 156 | getNotation(move) { |
| 157 | if (move.vanish.length > 0) return super.getNotation(move); |
| 158 | // First game move: |
| 159 | return "N@" + V.CoordsToSquare(move.end); |
| 160 | } |
| 161 | }; |