f7 combinations
Here are a few d4 games taken from the book Chess by Polgar. Black has pushed his h7 pawn forward. These mate combinations start with a sacrifice on f7.
Here is another one Wikstrom - Wood 1947. White wins.
After seeing the mate I think that black's mistake was putting his king on f8 instead of h8. He could have taken the bishop if the queen moved off the file and would have had one more move to defend.
