It shows up the same way in ChessBase Big Database 2006, but I wouldn't be surprised if the game actually went 13.b3 a6 14.h4 instead of 13.h4 a6 14.b3.

Hi.

I'm new to this forum and as a subscriber. I'm in the playing group average club level, but like to analyse.

In the game:

[Event "It 'World Open'"]
[Site "Philadelphia (USA)"]
[Date "2005.7.3"]
[Round "7"]
[White "Ehlvest Jaan (EST)"]
[Black "Perelshteyn Eugene (USA)"]
[Result "1/2-1/2"]
[Eco "B36"]

1.Nf3 c5 2.e4 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Nf6 6.Nc3 d6 7.Be2
Nxd4 8.Qxd4 Bg7 9.Bg5 O-O 10.Qd2 Be6 11.Rc1 Qa5 12.f3 Rfc8 13.h4
a6 14.b3 b5 15.Nd5 Qd8 16.Nf4 bxc4 17.Nxe6 c3 18.Rxc3 fxe6 19.Bc4
d5 20.exd5 exd5 21.Bxf6 Bxf6 22.Qxd5+ Qxd5 23.Bxd5+ Kg7 24.Rc4
Rxc4 25.Bxc4 Rd8 26.g3 h5 27.Ke2 a5 28.Bd3 Bb2 29.Rd1 Rd6 30.Rd2
Be5 31.f4 Bd4 32.Kf3 e5 33.Bc4 exf4 34.gxf4 Be5 35.Re2 Bf6 36.f5
Bxh4 37.fxg6 Kxg6 38.Re5 Bd8 39.Ke4 h4 1/2-1/2

White played the novelty 13.h4



Black answered with the normal Maroczy plan ...a6, ...b5.

Why didn't Black just take the pawn with 13...Bxc4?

I found this game in Chess Assistant's HugeBase where there are some comment, but this looks like automatic computer annotating. 13...a6 gets a '?' and the suggestion are 13...Bxc4!? 14.Bxc4 Rxc4 15.O-O Be6 -/+.

It seems strange to just drop a pawn like both GM blunder so early in the game. Maybe they still was on autopilot or the gamescore are wrong.

Odd Gunnar Malin