I thought this position would be a draw, but when I played with it, I managed to find mate. Can anyone see something wrong with this, such as what black could have done?
It's an easy win for white! He has mating material.
Most books have a list of pawnless endings and what to expect from them.
Queen against rook/bishop/knight: Queen wins
Queen against rook and bishop/knight: Draw
Queen against two bishops/bishop and knight: Queen usually wins
Queen against two knights: Usually a draw
Rook against knight/bishop: Draw
Rook and bishop against rook: Usually a draw
Rook and knight against rook: Draw
Queen and bishop/knight against queen: Usually a draw
Two bishops against knight: Bishops usually win
Queen or rook (against king only): Win
Two bishops: Win
Bishop and knight: Usually a draw
Two knights: Draw
Bishop or knight: Draw
Bishop and knight force checkmate against the bare King. But you have to know how to do it. It is the most complex of the "elementary" mates. The best explanation of the procedure I have seen is in Tarrasch's "The Game of Chess." But even masters have occasionally been embarrassed by having to confess they don't know how to do it and falling prey to the fifty-move rule for a draw.
The two knights draw against the bare King, but paradoxically can often force checkmate against King and pawn! This is because the pawn can be blocked and then released at the critical moment to avoid stalemate. All depends on where the pawn is.
WOW! Amazing
Black's only chances are:
-White not making time control
-White having a heart attack before routinely mating
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