client/src/variants/Knightmate1.js

   1 import { ChessRules } from "@/base_rules";
   2
   3 export class Knightmate1Rules extends ChessRules {
   4
   5   static get COMMONER() {
   6     return "c";
   7   }
   8
   9   static get PIECES() {
  10     return ChessRules.PIECES.concat([V.COMMONER]);
  11   }
  12
  13   getPpath(b) {
  14     return ([V.KING, V.COMMONER].includes(b[1]) ? "Knightmate/" : "") + b;
  15   }
  16
  17   static GenRandInitFen(randomness) {
  18     return ChessRules.GenRandInitFen(randomness)
  19       .replace(/n/g, 'c').replace(/N/g, 'C');
  20   }
  21
  22   getPotentialMovesFrom([x, y]) {
  23     switch (this.getPiece(x, y)) {
  24       case V.COMMONER:
  25         return this.getPotentialCommonerMoves([x, y]);
  26       default:
  27         return super.getPotentialMovesFrom([x, y]);
  28     }
  29   }
  30
  31   getPotentialCommonerMoves(sq) {
  32     return this.getSlideNJumpMoves(
  33       sq,
  34       V.steps[V.ROOK].concat(V.steps[V.BISHOP]),
  35       "oneStep"
  36     );
  37   }
  38
  39   getPotentialKingMoves(sq) {
  40     return super.getPotentialKnightMoves(sq).concat(super.getCastleMoves(sq));
  41   }
  42
  43   isAttacked(sq, color) {
  44     return (
  45       this.isAttackedByCommoner(sq, color) ||
  46       this.isAttackedByPawn(sq, color) ||
  47       this.isAttackedByRook(sq, color) ||
  48       this.isAttackedByBishop(sq, color) ||
  49       this.isAttackedByQueen(sq, color) ||
  50       this.isAttackedByKing(sq, color)
  51     );
  52   }
  53
  54   isAttackedByKing(sq, color) {
  55     return this.isAttackedBySlideNJump(
  56       sq,
  57       color,
  58       V.KING,
  59       V.steps[V.KNIGHT],
  60       "oneStep"
  61     );
  62   }
  63
  64   isAttackedByCommoner(sq, color) {
  65     return this.isAttackedBySlideNJump(
  66       sq,
  67       color,
  68       V.COMMONER,
  69       V.steps[V.ROOK].concat(V.steps[V.BISHOP]),
  70       "oneStep"
  71     );
  72   }
  73
  74   static get VALUES() {
  75     return {
  76       p: 1,
  77       r: 5,
  78       c: 5, //the commoner is valuable
  79       b: 3,
  80       q: 9,
  81       k: 1000
  82     };
  83   }
  84
  85 };