client/src/variants/Lostqueen.js

   1 import { ChessRules } from "@/base_rules";
   2
   3 export class LostqueenRules extends ChessRules {
   4
   5   // The king can move like a knight:
   6   getPotentialKingMoves(sq) {
   7     return (
   8       super.getPotentialKingMoves(sq).concat(
   9       super.getSlideNJumpMoves(sq, ChessRules.steps[V.KNIGHT], "oneStep"))
  10     );
  11   }
  12
  13   // Goal is to lose the queen (or be checkmated):
  14   getCurrentScore() {
  15     // If my queen disappeared, I win
  16     const color = this.turn;
  17     let haveQueen = false;
  18     outerLoop: for (let i=0; i<V.size.x; i++) {
  19       for (let j=0; j<V.size.y; j++) {
  20         if (
  21           this.board[i][j] != V.EMPTY &&
  22           this.getColor(i,j) == color &&
  23           this.getPiece(i,j) == V.QUEEN
  24         ) {
  25           haveQueen = true;
  26           break outerLoop;
  27         }
  28       }
  29     }
  30     if (!haveQueen) return color == "w" ? "1-0" : "0-1";
  31     if (this.atLeastOneMove()) return "*";
  32     // No valid move: the side who cannot move (or is checkmated) wins
  33     return this.turn == "w" ? "1-0" : "0-1";
  34   }
  35
  36 };