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