code: def is_irreversible(self, move: Move) -> bool:
          
          backrank = BB_RANK_1 if self.turn == WHITE else BB_RANK_8
          cr = self.clean_castling_rights() & backrank
          return bool(self.is_zeroing(move) or
                      cr and BB_SQUARES[move.from_square] & self.kings & ~self.promoted or
                      cr & BB_SQUARES[move.from_square] or
                      cr & BB_SQUARES[move.to_square])
docs: Checks if the given pseudo-legal move is irreversible.
  
          In standard chess, pawn moves, captures and moves that destroy castling
          rights are irreversible.