variants/Ambiguous/class.js

   1 import ChessRules from "/base_rules.js";
   2 import {FenUtil} from "/utils/setupPieces.js";
   3
   4 export default class AmbiguousRules extends ChessRules {
   5
   6   static get Options() {
   7     return {
   8       select: C.Options.select,
   9       styles: ["cylinder"]
  10     };
  11   }
  12
  13   get hasFlags() {
  14     return false;
  15   }
  16
  17   setOtherVariables(fenParsed) {
  18     super.setOtherVariables(fenParsed);
  19     if (this.movesCount == 0)
  20       this.subTurn = 2;
  21     else
  22       this.subTurn = 1;
  23   }
  24
  25   genRandInitBaseFen() {
  26     const s = FenUtil.setupPieces(
  27       ['r', 'n', 'b', 'q', 'k', 'b', 'n', 'r'],
  28       {
  29         randomness: this.options["randomness"],
  30         diffCol: ['b']
  31       }
  32     );
  33     return {
  34       fen: s.b.join("") + "/pppppppp/8/8/8/8/PPPPPPPP/" +
  35            s.w.join("").toUpperCase(),
  36       o: {}
  37     };
  38   }
  39
  40   canStepOver(x, y) {
  41     return this.board[x][y] == "" || this.getPiece(x, y) == V.GOAL;
  42   }
  43
  44   // Subturn 1: play a move for the opponent on the designated square.
  45   // Subturn 2: play a move for me (which just indicate a square).
  46   getPotentialMovesFrom([x, y]) {
  47     const color = this.turn;
  48     const oppCol = C.GetOppCol(color);
  49     if (this.subTurn == 2) {
  50       // Just play a normal move (which in fact only indicate a square)
  51       let movesHash = {};
  52       return (
  53         super.getPotentialMovesFrom([x, y])
  54         .filter(m => {
  55           // Filter promotions: keep only one, since no choice for now.
  56           if (m.appear[0].p != m.vanish[0].p) {
  57             const hash = C.CoordsToSquare(m.start) + C.CoordsToSquare(m.end);
  58             if (!movesHash[hash]) {
  59               movesHash[hash] = true;
  60               return true;
  61             }
  62             return false;
  63           }
  64           return true;
  65         })
  66         .map(m => {
  67           if (m.vanish.length == 1)
  68             m.appear[0].p = V.GOAL;
  69           else {
  70             m.appear[0].p = V.TARGET_CODE[m.vanish[1].p];
  71             m.appear[0].c = m.vanish[1].c;
  72           }
  73           m.vanish.shift();
  74           return m;
  75         })
  76       );
  77     }
  78     // At subTurn == 1, play a targeted move for the opponent.
  79     // Search for target:
  80     let target = {x: -1, y: -1};
  81     outerLoop: for (let i = 0; i < this.size.x; i++) {
  82       for (let j = 0; j < this.size.y; j++) {
  83         if (this.board[i][j] != "") {
  84           const piece = this.getPiece(i, j);
  85           if (
  86             piece == V.GOAL ||
  87             Object.keys(V.TARGET_DECODE).includes(piece)
  88           ) {
  89             target = {x: i, y:j};
  90             break outerLoop;
  91           }
  92         }
  93       }
  94     }
  95     const moves = super.getPotentialMovesFrom([x, y], oppCol);
  96     return moves.filter(m => m.end.x == target.x && m.end.y == target.y);
  97   }
  98
  99   canIplay(x, y) {
 100     const color = this.getColor(x, y);
 101     return (
 102       (this.subTurn == 1 && ![this.turn, this.playerColor].includes(color)) ||
 103       (this.subTurn == 2 && super.canIplay(x, y))
 104     );
 105   }
 106
 107   // Code for empty square target
 108   static get GOAL() {
 109     return 'g';
 110   }
 111
 112   static get TARGET_DECODE() {
 113     return {
 114       's': 'p',
 115       't': 'q',
 116       'u': 'r',
 117       'o': 'n',
 118       'c': 'b',
 119       'l': 'k'
 120     };
 121   }
 122
 123   static get TARGET_CODE() {
 124     return {
 125       'p': 's',
 126       'q': 't',
 127       'r': 'u',
 128       'n': 'o',
 129       'b': 'c',
 130       'k': 'l'
 131     };
 132   }
 133
 134   pieces(color, x, y) {
 135     const targets = {
 136       's': {"class": "target-pawn"},
 137       'u': {"class": "target-rook"},
 138       'o': {"class": "target-knight"},
 139       'c': {"class": "target-bishop"},
 140       't': {"class": "target-queen"},
 141       'l': {"class": "target-king"}
 142     };
 143     return Object.assign({ 'g': {"class": "target"} },
 144       targets, super.pieces(color, x, y));
 145   }
 146
 147   atLeastOneMove() {
 148     // Since there are no checks this seems true (same as for Magnetic...)
 149     return true;
 150   }
 151
 152   filterValid(moves) {
 153     return moves;
 154   }
 155
 156   isKing(x, y, p) {
 157     if (!p)
 158       p = this.getPiece(x, y);
 159     return ['k', 'l'].includes(p);
 160   }
 161
 162   getCurrentScore() {
 163     // This function is only called at subTurn 1
 164     const color = C.GetOppCol(this.turn);
 165     if (this.searchKingPos(color).length == 0)
 166       return (color == 'w' ? "0-1" : "1-0");
 167     return "*";
 168   }
 169
 170   postPlay(move) {
 171     const color = this.turn;
 172     if (this.subTurn == 2 || this.searchKingPos(color).length == 0) {
 173       this.turn = C.GetOppCol(color);
 174       this.movesCount++;
 175     }
 176     this.subTurn = 3 - this.subTurn;
 177   }
 178
 179 };