normalizeMove method

Move normalizeMove(
  1. NormalMove move
)

Normalize a NormalMove to avoid castling inconsistencies.

The normalized form of a castling move is the king-to-rook move.

This method does not check if the move is legal.

Implementation

Move normalizeMove(NormalMove move) {
  final side = _getCastlingSide(move);
  if (side == null) return move;
  final castlingRook = castles.rookOf(turn, side);
  return NormalMove(
    from: move.from,
    to: castlingRook ?? move.to,
  );
}