client/src/variants/Pawnsking.js

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