client/src/variants/Selfabsorption.js

   1 import { ChessRules } from "@/base_rules";
   2 import { AbsorptionRules } from "@/variants/Absorption";
   3
   4 export class SelfabsorptionRules extends AbsorptionRules {
   5
   6   canTake([x1, y1], [x2, y2]) {
   7     if (this.getColor(x1, y1) !== this.getColor(x2, y2)) return true;
   8     const p1 = this.getPiece(x1, y1);
   9     const p2 = this.getPiece(x2, y2);
  10     return (
  11       p1 != p2 &&
  12       [V.QUEEN, V.ROOK, V.KNIGHT, V.BISHOP].includes(p1) &&
  13       [V.QUEEN, V.ROOK, V.KNIGHT, V.BISHOP].includes(p2) &&
  14       (p1 != V.QUEEN || p2 == V.KNIGHT) &&
  15       (p2 != V.QUEEN || p1 == V.KNIGHT)
  16     );
  17   }
  18
  19   getPotentialMovesFrom(sq) {
  20     let moves = [];
  21     const piece = this.getPiece(sq[0], sq[1]);
  22     switch (piece) {
  23       case V.RN:
  24         moves =
  25           super.getPotentialRookMoves(sq).concat(
  26           super.getPotentialKnightMoves(sq));
  27         break;
  28       case V.BN:
  29         moves =
  30           super.getPotentialBishopMoves(sq).concat(
  31           super.getPotentialKnightMoves(sq));
  32         break;
  33       case V.QN:
  34         moves =
  35           super.getPotentialQueenMoves(sq).concat(
  36           super.getPotentialKnightMoves(sq));
  37         break;
  38       case V.PAWN:
  39         moves = super.getPotentialPawnMoves(sq);
  40         break;
  41       case V.ROOK:
  42         moves = super.getPotentialRookMoves(sq);
  43         break;
  44       case V.KNIGHT:
  45         moves = super.getPotentialKnightMoves(sq);
  46         break;
  47       case V.BISHOP:
  48         moves = super.getPotentialBishopMoves(sq);
  49         break;
  50       case V.QUEEN:
  51         moves = super.getPotentialQueenMoves(sq);
  52         break;
  53       case V.KING:
  54         moves = super.getPotentialKingMoves(sq);
  55         break;
  56     }
  57     moves.forEach(m => {
  58       if (
  59         m.vanish.length == 2 && m.appear.length == 1 &&
  60         piece != m.vanish[1].p && m.vanish[0].c == m.vanish[1].c
  61       ) {
  62         // Augment pieces abilities in case of self-captures
  63         m.appear[0].p = V.Fusion(piece, m.vanish[1].p);
  64       }
  65     });
  66     return moves;
  67   }
  68
  69 };