client/src/variants/Relayup.js

   1 import { ChessRules } from "@/base_rules";
   2
   3 // Pawns relayed by one square at a time (but with relaying pioece movements)
   4 // diff from https://www.chessvariants.com/rules/relay-chess ==> new name
   5 export class RelayupRules extends ChessRules {
   6
   7   static get PawnSpecs() {
   8     return Object.assign(
   9       {},
  10       ChessRules.PawnSpecs,
  11       { twoSquares: false }
  12     );
  13   }
  14
  15   static get HasFlags() {
  16     return false;
  17   }
  18
  19   static get HasEnpassant() {
  20     return false;
  21   }
  22
  23   getPotentialMovesFrom([x, y]) {
  24     let moves = super.getPotentialMovesFrom([x, y]);
  25
  26     // Expand possible moves if guarded by friendly pieces:
  27     // --> Pawns cannot be promoted through a relaying move (thus 8th rank forbidden)
  28     // TODO
  29
  30     return moves;
  31   }
  32
  33   getNotation(move) {
  34     // Translate final and initial square
  35     const initSquare = V.CoordsToSquare(move.start);
  36     const finalSquare = V.CoordsToSquare(move.end);
  37     const piece = this.getPiece(move.start.x, move.start.y);
  38
  39     // Since pieces and pawns could move like knight,
  40     // indicate start and end squares
  41     let notation =
  42       piece.toUpperCase() +
  43       initSquare +
  44       (move.vanish.length > move.appear.length ? "x" : "") +
  45       finalSquare
  46
  47     if (
  48       piece == V.PAWN &&
  49       move.appear.length > 0 &&
  50       move.appear[0].p != V.PAWN
  51     ) {
  52       // Promotion
  53       notation += "=" + move.appear[0].p.toUpperCase();
  54     }
  55
  56     return notation;
  57   }
  58
  59 };