client/src/variants/Vchess.js

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