How Many...?

Here's a Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ ) game that has puzzled me mightily. It is, among other things, an exploration into the question "How many pawns provide White compensation for his sacrificed piece?"

guest585 - guest983

ICC 2 12, 2001

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ng6 7.Qxc5 Qe7

Counter-attacking the center – and White would prefer not to exchange Queens.

8.Qc4+ d5

What's a pawn between friends? White will now have three for his Knight, but Black is planning to develop his pieces quickly and then squash his opponent like a bug!

Calmer was 8...Qe6 9.Qc3 (9.Qxe6 Kxe6 10.0-0 Nf6 11.f4 Ne7 12.f5+ Ke5 13.d3 d5 14.Bf4+ Kd4 15.c3+ Kc5 16.e5 Bxf5 17.exf6 gxf6 18.Bxc7 Rac8 19.Ba5 Bxd3 20.Rxf6 Nc6 21.Na3 d4 22.cxd4+ Nxd4 23.Rd1 Be4 24.Bb4+ Kd5 25.Rd6+ Black resigned, obviously - levigun, www.GameKnot.com, 2004) Qxe4+ 10.Qe3 Qxg2 11.Rf1 Qxh2 12.d3 Nf6 13.Nc3 Re8 14.Ne4 d5 15.Ng5+ Kf8 0-1 Nestor250168 - drewbear, www.chessworld.net, 2007

9.Qxd5+ Be6 10.Qxb7 Re8

Materialists are probably getting nervous here, and the computer – a classic material-grabber – agrees, suggesting instead 10...Nf6 11.d3 Rhb8 with superior development and approximate equality.

11.d3 h6 12.Nc3 Nf6 13.Be3

I don't care how many pawns White has for his piece, he looks like he is in terrible danger. Yet, Rybka 3 insists that White can have another serving with 13.Qxa7 and get away with it.

13...Rhf8

Consistent; but sliding the other Rook over to confront the Queen was better.

14.0-0

Rybka still prefers the pawn-grab at a7.

14...c5 15.Qxe7+ Nxe7 16.Bxc5 Kg8 17.Bxa7 Ng6 18.f4 Black resigns

Amazing.