Weiß am zug - mate in 4

Bjorn Frank vs J Willens, Amsterdam, 1923

[FEN "r1r3k1/pp1q1p1p/4nBpQ/3pP3/1b5P/3B4/P1P3P1/R2K3R w - - 1 0 KQkq - 0 1"] [NAVIGATION "0"] [CUSTOM_MOVE "1"] 1.h5 Bc3 2.Qxh7+ Kxh7 3. hxg6+ Kg8 4.Rh8#