client/src/variants/Pawnsking.js

   1 import { ChessRules } from "@/base_rules";
   2
   3 export class PawnskingRules extends ChessRules {
   4
   5   static get Options() {
   6     return null;
   7   }
   8
   9   static get PawnSpecs() {
  10     return Object.assign(
  11       {},
  12       ChessRules.PawnSpecs,
  13       // The promotion piece doesn't matter, the game is won
  14       { promotions: [V.QUEEN] }
  15     );
  16   }
  17
  18   static get HasFlags() {
  19     return false;
  20   }
  21
  22   static GenRandInitFen() {
  23     return "4k3/pppppppp/8/8/8/8/PPPPPPPP/4K3 w 0 -";
  24   }
  25
  26   filterValid(moves) {
  27     return moves;
  28   }
  29
  30   getCheckSquares() {
  31     return [];
  32   }
  33
  34   getCurrentScore() {
  35     const color = this.turn;
  36     if (this.kingPos[color][0] < 0) return (color == "w" ? "0-1" : "1-0");
  37     const oppCol = V.GetOppCol(color);
  38     const lastRank = (oppCol == 'w' ? 0 : 7);
  39     if (this.board[lastRank].some(cell => cell[0] == oppCol))
  40       // The opposing edge is reached!
  41       return (oppCol == "w" ? "1-0" : "0-1");
  42     if (this.atLeastOneMove()) return "*";
  43     return "1/2";
  44   }
  45
  46   postPlay(move) {
  47     super.postPlay(move);
  48     if (move.vanish.length == 2 && move.vanish[1].p == V.KING)
  49       this.kingPos[this.turn] = [-1, -1];
  50   }
  51
  52   postUndo(move) {
  53     super.postUndo(move);
  54     if (move.vanish.length == 2 && move.vanish[1].p == V.KING)
  55       this.kingPos[move.vanish[1].c] = [move.vanish[1].x, move.vanish[1].y];
  56   }
  57
  58   static get SEARCH_DEPTH() {
  59     return 4;
  60   }
  61
  62 };