Chess>Combinations>KnightFork>Rook>windmill>mate>1
Kupper-Olaafsson 1959
White To Play
1) RF7+ KG8
if 1)... RxF7, 2)NE6 is a "family fork"
2) RG7+ KH8
if)... KxG7 2)NE6 again
3)RxH7+ KG8
4)RxG6 wins, white is 3 pawns ahead due to the Knight-Rook "Windmill."