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, color, V.PAWN, V.steps[V.BISHOP], 1);
  16   }
  17
  18   getNotation(move) {
  19     let notation = super.getNotation(move);
  20     // If pawn captures backward, add an indication 'b'
  21     if (
  22       move.appear[0].p == V.PAWN &&
  23       (
  24         (move.appear[0].c == 'w' && (move.end.x - move.start.x > 0)) ||
  25         (move.appear[0].c == 'b' && (move.end.x - move.start.x < 0))
  26       )
  27     ) {
  28       notation += 'b';
  29     }
  30     return notation;
  31   }
  32
  33 };