(1) Klein,J (2140) - Hummel,P (2441) [C17]
US Amateur Team West Championship (2), 14.02.2004
[Hummel]



1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2 Ne7 6.Nb5 Bxd2+ 7.Qxd2 0-0 8.dxc5 Nd7 9.Qc3
I think this is already slightly dubious. White is too far behind in development to be making such moves. Instead, after [ 9.Nf3 Nxc5 the game is equal.]

9...Nc6
Perhaps slightly more accurate was the immediate [ 9...f6 so as to retain the option of meeting 10.f4 with 10...Ng6 ; 9...a6 10.Nd6 Qc7= was also playable.]

10.f4 f6 11.Nf3 fxe5 12.fxe5 b6!
This nice pawn sacrifice effectively refutes white's entire opening concept. After

13.cxb6 Qxb6
black's queen prevents white from ever castling kingside; blocking with the knight on d4 always loses the e5 pawn. This means white's king has to go queenside, but then it is quickly attacked along the b and c files...

14.a4 a5 15.0-0-0 Nc5-/+ 16.Nbd4 Bd7 17.Nxc6 Bxc6 18.b3 Rab8
Threatening 19...Bxa4 20.bxa4 Qb1+ 21.Kd2 Ne4+

19.Bd3 Rfc8 20.Nd4 Be8 21.Bb5
This loses quickly, but white had no escape.

21...Nxa4 22.Qd3 Nc5 0-1