1. Qa7 f1=Q 2.Qh1+ Bh2 (2.Nf2+ Qxf2; 2.Rh8+ Bh2) right?

1.Qb2 f1=Q 2.Qh8+ Bh2, other checks are blocked, right?

EDIT: Wait: 1.Qb2 f1=Q 2.Ng3#; 1.Qb2 f1=N 2.Qg2#; 1.Qb2 Bh2 2.Nxf2#; 1.Qb2 Kh2 2.Qh8#

Success!

ScottieK