Bonzon,Roman (1589) - Beydler,John C (1755) [A80]
Illowa Oct 05 Swiss Davenport, IA (1), 04.10.2005
[Bonzon,Roman]

This is my 7th tournament game against club mainstay, John Beydler. He's beaten me in every previous game, sometimes embarassingly quickly

1.d4 f5 2.f4
I've played the Dutch myself, and am therefore familiar with the pawn structures. I decided to go for a symmetrical response, the Reverse Stonewall

2...Nf6 3.Nf3 g6
The Leningrad Variation

4.e3 Bg7 5.c3 d6 6.Bc4 c6 7.Ng5
I know this is premature, but I wanted Black to commit his pawns

7...d5 8.Bd3 Nbd7?
Black should have simply castled, or tried the thematic Ne4

9.Ne6 Qb6 10.Nxg7+ Kf7 11.Nxf5 gxf5 12.Bxf5 e6 13.Bc2 Rg8 14.Qf3 Nf8 15.e4
trying to exchange pieces and open lines against Black's weakend king; better would have been 15.Nd2, developing, but otherwise keeping the status quo

15...Ng6
here I saw Black's threat of ...Nh4 followed by ...Nxg2, and therefore decided to play it safe. Fritz of course found the following variation:

16.g3
[16.e5! Nh4 17.Qh3 Nxg2+ 18.Kf1 Nxf4 (18...Ne4 19.Rg1 Qb5+ 20.Bd3 Qb6 21.Rxg2 ) 19.Qf3 N6h5 20.Bxf4 Nxf4 21.Qxf4+ Ke8 ]

16...dxe4 17.Bxe4 Bd7 18.Nd2 Nxe4 19.Qxe4 Qb5 20.Nf3 Rg7 21.Ne5+ Nxe5 22.fxe5 Kg8 23.Rf1 Be8 24.b3 Bg6 25.Qe3 Bf5 26.c4 Qb4+ 27.Qd2 Qe7 28.Rf4! Rd8 29.Qe2 Qf7?? 30.g4 Rxg4 31.Rxg4+ Bxg4 32.Qxg4+ Kh8
I did see 33.Bg5 Rg8 34.Bf6+ Qxf6 35.Qxg8+ Kxg8 36.exf6, when I would have been up a rook, but I was distracted by 33.Bg5 h6, and didn't see the perfectly obvious 34.Bxd8

33.Qf4? Qd7??
much bette r, comparatively, for Black would have been 33...Qxf4 34.Bxf4 Rxd4 35.Bg3, when White would only have been up a piece

34.Qf6+ Kg8 35.Bh6
and it's mate in 5. The Black king is in stalemate, so a check that doesn't release him would be mate. Since Black's queen and rook are severely restricted, White has 0-0-0 followed by Rg1+. 1-0