client/src/variants/Doublearmy.js

   1 import { ChessRules } from "@/base_rules";
   2
   3 // Ideas with 2 kings:
   4 // Stage 1 {w, b} : 2 kings on board, value 5.
   5 // Stage 2: only one, get mated and all that, value 1000
   6 // ...But the middle king will get captured quickly...
   7
   8 export class DoublearmyRules extends ChessRules {
   9   static get COMMONER() {
  10     return "c";
  11   }
  12
  13   static get PIECES() {
  14     return ChessRules.PIECES.concat([V.COMMONER]);
  15   }
  16
  17   getPpath(b) {
  18     return (b[1] == V.COMMONER ? "Doublearmy/" : "") + b;
  19   }
  20
  21   static GenRandInitFen(randomness) {
  22     const fen = ChessRules.GenRandInitFen(randomness);
  23     const rows = fen.split(" ")[0].split("/");
  24     return (
  25       rows[0] + "/" +
  26       rows[1] + "/" +
  27       rows[0].replace('k', 'c') + "/" +
  28       rows[1] + "/" +
  29       rows[6] + "/" +
  30       rows[7].replace('K', 'C') + "/" +
  31       rows[6] + "/" +
  32       rows[7] + fen.slice(-11)
  33     );
  34   }
  35
  36   getPotentialMovesFrom([x, y]) {
  37     switch (this.getPiece(x, y)) {
  38       case V.COMMONER:
  39         return this.getPotentialCommonerMoves([x, y]);
  40       default:
  41         return super.getPotentialMovesFrom([x, y]);
  42     }
  43   }
  44
  45   getPotentialCommonerMoves(sq) {
  46     return this.getSlideNJumpMoves(
  47       sq,
  48       V.steps[V.ROOK].concat(V.steps[V.BISHOP]),
  49       "oneStep"
  50     );
  51   }
  52
  53   isAttacked(sq, color) {
  54     return (
  55       super.isAttacked(sq, color) ||
  56       this.isAttackedByCommoner(sq, color)
  57     );
  58   }
  59
  60   isAttackedByCommoner(sq, color) {
  61     return this.isAttackedBySlideNJump(
  62       sq,
  63       color,
  64       V.COMMONER,
  65       V.steps[V.ROOK].concat(V.steps[V.BISHOP]),
  66       "oneStep"
  67     );
  68   }
  69
  70   static get VALUES() {
  71     return Object.assign(
  72       {},
  73       ChessRules.VALUES,
  74       { c: 5 }
  75     );
  76   }
  77
  78   static get SEARCH_DEPTH() {
  79     return 2;
  80   }
  81 };