variants/Ambiguous/class.js

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