Mate in 7

i have seen this B-4
edward lasker vs thomas .....(i forget)

Well,The Ans is:1.Qxh7+ Kxh7 2.Nxf6+ Kh6 3.Neg4+ Kg5 4.h4+ Kf4 5.g3+ Kf3 6.Kf1 or O-O Qxf6 Nh2#( If They dont take the knight with the queen still Nh2#)