which last space?

He means he can't promote to a queen. And can u show an example of this happening?

Steve: Assuming you aren't referring to a bug but rather strong defense of the 8th rank, my advice is to study endgames. At this stage, pawn promotion is the whole point, since there is not enough material on the board to directly persue a checkmate at that point. Start with simple K+P vs. K endings, then endings with pawns on both sides.