variants/Discoduel/class.js

   1 import ChessRules from "/base_rules.js";
   2 import {ArrayFun} from "/utils/array.js"
   3
   4 export default class DiscoduelRules extends ChessRules {
   5
   6   static get Options() {
   7     return {}; //nothing would make sense
   8   }
   9
  10   get pawnPromotions() {
  11     return ['p'];
  12   }
  13
  14   get hasFlags() {
  15     return false;
  16   }
  17
  18   genRandInitBaseFen() {
  19     return {
  20       fen: "1n4n1/8/8/8/8/8/PPPPPPPP/8",
  21       o: {}
  22     };
  23   }
  24
  25   getPotentialMovesFrom([x, y]) {
  26     const moves = super.getPotentialMovesFrom([x, y]);
  27     if (this.turn == 'b')
  28       // Prevent pawn captures on last rank:
  29       return moves.filter(m => m.vanish.length == 1 || m.vanish[1].x != 0);
  30     return moves;
  31   }
  32
  33   filterValid(moves) {
  34     return moves;
  35   }
  36
  37   getCurrentScore() {
  38     // No real winning condition (promotions count...)
  39     if (
  40       ArrayFun.range(1, this.size.x).every(row_idx => {
  41         return this.board[row_idx].every(square => {
  42           return (!square || square.charAt(0) != 'w');
  43         })
  44       })
  45       ||
  46       !this.atLeastOneMove(this.turn)
  47     ) {
  48       return "1/2";
  49     }
  50     return "*";
  51   }
  52
  53 };