The promotion moves are all different. You cannot complete the move until you say which piece you are making it.
But the problem said "(count the pawn promotion as one move)."
Also, the FEN says that Black has not ruled out a future kingside or queenside castling, but currently 0-0 is illegal, as people have pointed out.
But the problem said "(count the pawn promotion as one move)."
Also, the FEN says that Black has not ruled out a future kingside or queenside castling, but currently 0-0 is illegal, as people have pointed out.