client/src/variants/Vchess.js

   1 import { ChessRules } from "@/base_rules";
   2
   3 export class VchessRules extends ChessRules {
   4
   5   static get PawnSpecs() {
   6     return Object.assign(
   7       {},
   8       ChessRules.PawnSpecs,
   9       { captureBackward: true }
  10     );
  11   }
  12
  13   isAttackedByPawn(sq, color) {
  14     return this.isAttackedBySlideNJump(
  15       sq,
  16       color,
  17       V.PAWN,
  18       V.steps[V.BISHOP],
  19       "oneStep"
  20     );
  21   }
  22
  23   getNotation(move) {
  24     let notation = super.getNotation(move);
  25     // If pawn captures backward, add an indication 'b'
  26     if (
  27       move.appear[0].p == V.PAWN &&
  28       (
  29         (move.appear[0].c == 'w' && (move.end.x - move.start.x > 0)) ||
  30         (move.appear[0].c == 'b' && (move.end.x - move.start.x < 0))
  31       )
  32     ) {
  33       notation += 'b';
  34     }
  35     return notation;
  36   }
  37
  38 };