Round 4: Slive-Williams 1-0

Slive plays a very nice game, taking advantage of a couple of mistakes by Williams to execute a mating attack on Black's king.

[Event "BCC Championship"]
[Site "Somerville, MA USA"]
[Date "2004.09.29"]
[Round "4"]
[White "Slive, Alex"]
[Black "Williams, Chris”]
[Result "1-0"]
[WhiteUSCF "2039"]
[BlackUSCF "2053"]
[ECO "A42"]
[Opening "Modern Defense"]
[Variation "Averbakh"]

1.d4 g6 2.Nf3 Bg7 3.c4 d6 4.Nc3 Nd7 5.e4 e5 6.Be3 Ne7 7.g3 0-0 8.Bg2 f6

[8...exd4 and 8...f5 are the moves more commonly played in this position]

9.0-0 exd4 10.Nxd4 Ne5 11.h3 Kh8

[Taking the c4 pawn leads to an advantage for White, e.g, 11...Nxc4 12.Qb3 d5 13.exd5 Nd6 14.Ncb5 Nef5 15.Nxf5 Bxf5 16.Nxd6 cxd6 17.Qxb7]

12.Qe2 N7c6 13.Rad1 Nxd4 14.Bxd4 Be6 15.b3

[15.Nd5 was possible]

15...Qc8 16.Kh2 f5?

[Better is 16...Nc6!? +/= Fritz]

17.f4 c5 18.Bg1 Nc6?!

[Black could have tried 18...Nxc4 19.exf5 gxf5 20.bxc4 Bxc3 21.Rxd6 though White maintains an advantage through control of the central files]

19.Nb5 fxe4 20.Nxd6 Qc7 21.Bxc5 Nd8 22.Nxe4 Re8 23.Bd6 Qa5 24.Qd2 Qh5 25.Ng5 Bg4 26.Rde1 Rxe1 27.Rxe1 Nc6 28.Qd5 Bf6 29.Qf7 Bxg5 30.Re8+ 1-0 [Mate in 2]