client/src/variants/Rugby.js

   1 import { ChessRules } from "@/base_rules";
   2 import { ArrayFun } from "@/utils/array";
   3
   4 export class RugbyRules extends ChessRules {
   5
   6   static get HasFlags() {
   7     return false;
   8   }
   9
  10   static get PawnSpecs() {
  11     return Object.assign(
  12       {},
  13       ChessRules.PawnSpecs,
  14       { promotions: [V.PAWN] }
  15     );
  16   }
  17
  18   scanKings() {}
  19
  20   getPotentialMovesFrom(sq) {
  21     // There are only pawns:
  22     return this.getPotentialPawnMoves(sq);
  23   }
  24
  25   getPotentialPawnMoves(sq) {
  26     const moves = super.getPotentialPawnMoves(sq);
  27     // Add king movements, without capturing
  28     const steps =
  29       this.turn == 'w'
  30         ? [ [-1,-1], [-1,1], [0,1], [0,-1], [1,-1], [1,0], [1,1] ]
  31         : [ [1,-1], [1,1], [0,1], [0,-1], [-1,-1], [-1,0], [-1,1] ];
  32     let addMoves = this.getSlideNJumpMoves(sq, steps, "oneStep");
  33     return moves.concat(addMoves.filter(m => m.vanish.length == 1));
  34   }
  35
  36   static GenRandInitFen() {
  37     // Non-randomized variant. En-passant possible:
  38     return "pppppppp/8/8/8/8/8/8/PPPPPPPP w 0 -";
  39   }
  40
  41   filterValid(moves) {
  42     return moves;
  43   }
  44
  45   prePlay() {}
  46   postPlay() {}
  47   preUndo() {}
  48   postUndo() {}
  49
  50   getCheckSquares() {
  51     return [];
  52   }
  53
  54   getCurrentScore() {
  55     // Turn has changed:
  56     const color = V.GetOppCol(this.turn);
  57     const lastRank = (color == "w" ? 0 : V.size.x - 1);
  58     if (ArrayFun.range(8).some(i => this.getColor(lastRank, i) == color))
  59       // The opposing edge is reached!
  60       return color == "w" ? "1-0" : "0-1";
  61     if (this.atLeastOneMove()) return "*";
  62     // Stalemate (will probably never happen)
  63     return "1/2";
  64   }
  65
  66 };