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   genRandInitFen(seed) {
  26     const options = Object.assign({mode: "suicide"}, this.options);
  27     const gr = new GiveawayRules({options: options, genFenOnly: true});
  28     return gr.genRandInitFen(seed);
  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.vanish.shift();
  63           return m;
  64         })
  65       );
  66     }
  67     // At subTurn == 1, play a targeted move for the opponent.
  68     // Search for target (we could also have it in a stack...)
  69     let target = {x: -1, y: -1};
  70     outerLoop: for (let i = 0; i < this.size.x; i++) {
  71       for (let j = 0; j < this.size.y; j++) {
  72         if (this.board[i][j] != "") {
  73           const piece = this.getPiece(i, j);
  74           if (
  75             piece == V.GOAL ||
  76             Object.keys(V.TARGET_DECODE).includes(piece)
  77           ) {
  78             target = {x: i, y:j};
  79             break outerLoop;
  80           }
  81         }
  82       }
  83     }
  84     const moves = super.getPotentialMovesFrom([x, y], oppCol);
  85     return moves.filter(m => m.end.x == target.x && m.end.y == target.y);
  86   }
  87
  88   canIplay(x, y) {
  89     const color = this.getColor(x, y);
  90     return (
  91       (this.subTurn == 1 && ![this.turn, this.playerColor].includes(color)) ||
  92       (this.subTurn == 2 && super.canIplay(x, y))
  93     );
  94   }
  95
  96   // Code for empty square target
  97   static get GOAL() {
  98     return 'g';
  99   }
 100
 101   static get TARGET_DECODE() {
 102     return {
 103       's': 'p',
 104       't': 'q',
 105       'u': 'r',
 106       'o': 'n',
 107       'c': 'b',
 108       'l': 'k'
 109     };
 110   }
 111
 112   static get TARGET_CODE() {
 113     return {
 114       'p': 's',
 115       'q': 't',
 116       'r': 'u',
 117       'n': 'o',
 118       'b': 'c',
 119       'k': 'l'
 120     };
 121   }
 122
 123   pieces(color, x, y) {
 124     const targets = {
 125       's': {"class": "target-pawn", moves: []},
 126       'u': {"class": "target-rook", moves: []},
 127       'o': {"class": "target-knight", moves: []},
 128       'c': {"class": "target-bishop", moves: []},
 129       't': {"class": "target-queen", moves: []},
 130       'l': {"class": "target-king", moves: []}
 131     };
 132     return Object.assign({ 'g': {"class": "target", moves: []} },
 133       targets, super.pieces(color, x, y));
 134   }
 135
 136   atLeastOneMove() {
 137     // Since there are no checks this seems true (same as for Magnetic...)
 138     return true;
 139   }
 140
 141   filterValid(moves) {
 142     return moves;
 143   }
 144
 145   isKing(symbol) {
 146     return ['k', 'l'].includes(symbol);
 147   }
 148
 149   getCurrentScore() {
 150     // This function is only called at subTurn 1
 151     const color = C.GetOppCol(this.turn);
 152     if (this.searchKingPos(color).length == 0)
 153       return (color == 'w' ? "0-1" : "1-0");
 154     return "*";
 155   }
 156
 157   postPlay(move) {
 158     const color = this.turn;
 159     if (this.subTurn == 2 || this.searchKingPos(color).length == 0) {
 160       this.turn = C.GetOppCol(color);
 161       this.movesCount++;
 162     }
 163     this.subTurn = 3 - this.subTurn;
 164   }
 165
 166 };