Vlastimil Siebenburger (1943) - Spanton (1980)
QGD Exchange
1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 c6 6.Qc2 Na6 7.e3 Nc7
The mainline in ChessBase's 2024 Mega database runs 7...Nb4 8.Qd2 (8.Qb1 is also common) Bf5 9.Rc1 a5 10.a3 Na6, with equality, according to Stockfish16.1 and Dragon1.
8.Bd3 Ne6 9.Bh4 Bd6?!
More popular and probably better are 9...g6 and 9...Be7.
10.Nge2 h6 11.f3 Be7!?
This is Stockfish16.1's top choice, but clearly Black has lost a tempo.
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| How should White proceed? |
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12.e4?!
White is slightly better after moves such as 12.0-0-0 (Stockfish16.1) and 12.0-0 (Dragon1).
12...dxe4 13.fxe4?
The engines reckon White has good compensation for a pawn after 13.Nxe4 Nxd4 14.Nxd4 Qxd4 15.0-0-0, but they agree 13...0-0!? leaves Black slightly better.
13...Nxd4 14.Nxd4 Qxd4 15.Bf2 Qe5 16.0-0-0 Ng4!
The engines agree this is best.
17.Bg3 Qg5+ 18.Rd2 Qc5 19.Kb1 Bg5 20.Re2 0-0
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| Now both sides have castled, how would you assess the position? |
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Black is a pawn up, and White has an extra pawn-island. White is ahead on development, but Black is at least as active, and is winning, according to the engines.
21.e5 Be6 22.Ne4!?
This leads to sharp play.
22...Qxc2+ 23.Bxc2 Bc4 24.Ree1 Ne3 25.Nxg5 Nxc2 26.Kxc2 hxg5 27.h4 g4 28.h5 Rfd8?!
Almost certainly better is 28...Kh7.
29.h6 Rd3?!
Black is at least slightly better after 29...Bd3+.
30.Bh4 gxh6??
This loses, whereas withdrawing the rook to d5 or d7 holds.
31.Re4 h5?!
This makes matters worse, but 31...Ba6 32.Rxg4+ Kf8 33.Bf6 also wins easily.
The game finished:
32.Rxc4 Re3 33.Bf6 Re2+ 34.Kd3 Rxg2 35.Rxh5 Rg3+ 36.Ke2 Rh3 37.Rxg4+ Kf8 38.Rxh3 1-0
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