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 be captured quickly...
   7
   8 export class DoublearmyRules extends ChessRules {
   9
  10   static get COMMONER() {
  11     return "c";
  12   }
  13
  14   static get PIECES() {
  15     return ChessRules.PIECES.concat([V.COMMONER]);
  16   }
  17
  18   getPpath(b) {
  19     return (b[1] == V.COMMONER ? "Doublearmy/" : "") + b;
  20   }
  21
  22   static GenRandInitFen(randomness) {
  23     const fen = ChessRules.GenRandInitFen(randomness);
  24     const rows = fen.split(" ")[0].split("/");
  25     return (
  26       rows[0] + "/" +
  27       rows[1] + "/" +
  28       rows[0].replace('k', 'c') + "/" +
  29       rows[1] + "/" +
  30       rows[6] + "/" +
  31       rows[7].replace('K', 'C') + "/" +
  32       rows[6] + "/" +
  33       rows[7] + fen.slice(-11)
  34     );
  35   }
  36
  37   getPotentialMovesFrom([x, y]) {
  38     switch (this.getPiece(x, y)) {
  39       case V.COMMONER:
  40         return this.getPotentialCommonerMoves([x, y]);
  41       default:
  42         return super.getPotentialMovesFrom([x, y]);
  43     }
  44   }
  45
  46   getPotentialCommonerMoves(sq) {
  47     return this.getSlideNJumpMoves(
  48       sq,
  49       V.steps[V.ROOK].concat(V.steps[V.BISHOP]),
  50       "oneStep"
  51     );
  52   }
  53
  54   isAttacked(sq, color) {
  55     return (
  56       super.isAttacked(sq, color) ||
  57       this.isAttackedByCommoner(sq, color)
  58     );
  59   }
  60
  61   isAttackedByCommoner(sq, color) {
  62     return this.isAttackedBySlideNJump(
  63       sq,
  64       color,
  65       V.COMMONER,
  66       V.steps[V.ROOK].concat(V.steps[V.BISHOP]),
  67       "oneStep"
  68     );
  69   }
  70
  71   static get VALUES() {
  72     return Object.assign(
  73       {},
  74       ChessRules.VALUES,
  75       { c: 5 }
  76     );
  77   }
  78
  79   static get SEARCH_DEPTH() {
  80     return 2;
  81   }
  82
  83 };