The Pawn on f2

[FEN "5bk1/5qp1/6Q1/4r3/P1p1N3/7P/2B2PP1/6K1 w - - 0 1"]
1. Qh7+ Kxh7 2. Ng5+ Kg8 3. Bh7+ {The class act move you had to see when saccing the Queen. This way the Knight picks up the Rook as well as the Queen.} 3... Kh8 4. Nxf7+ Kxh7 5. Nxe5 {So far so good. Now how many stopped here. You should go deeper to look for any afters. Many a good combo has been ruined by an unexpected trick, often unseen by both players, appearing right at the end of a combo.} 5... c3 {That is why I continued looking. He's a runner.} 6. Nd3 {The White King is too far away, The Knight covers the Queening square but so can the Bishop.} 6... Ba3 {Ahh...no good the pawn on f2. End of calcualtion.} 7. Kf1 {7.a5 is good enough. (I see that now) But playing this to show you that a7 is the Queening square, not a8.. a8 is not covered by the Bishop and when I spotted the f2 pawn I stopped working it out.} 7... c2 8. a5 c1=Q+ 9. Nxc1 Bxc1 10. a6 {And thanks to the pawn on f2 the a-pawn Queens.}