Now some applications and extensions on a full board. Ask what resources you have available to mate here and see your queen’s bishop bearing down on the long diagonal. This should cause you to think about ways of coordinating the bishop’s attack with another along the h-file. The file already is open, so it’s just a matter of deciding how to exploit it. White has two pieces he can get there in a hurry: his queen and his c3 rook. You don’t want to use the queen because Qh5+ causes Black to capture g6xQ and close the h-file. Instead you play Rh3+, which forces Kg8; and then comes Rh8#—Anderssen’s final position without any sacrifice needed to get there.