Friday, September 2, 2016

Hofmann Wins BDG Teichmann

Attack! That is the goal of the Blackmar-Diemer Gambit. Marko Hoffman demonstrates excellent instincts in his approach against the BDG Teichmann. Black was played by Friedrich Grunert.

The main line Teichmann Exchange begins 5.Nxf3 Bg4 6.h3 Bxf3 7.Qxf3 c6. Hoffman chose 8.Be3 e6 9.Bd3 Be7 10.0-0-0. This gives White equal chances in theory. After 11…0-0 a flexible choice is 11.Kb1. This gets the king out of the line of fire and defends a2 before White must determine the exact target squares on which to focus.

Hoffmann went all out for an attack with 11.g4!? Nd5 12.h4. An alternative was 12.Qe4. Here are some possibilities. If White had played 12.Qe4 there is a mate threat on h7. Black should not return the pawn with 12…f5? 13.Qxe6+ when White has a great attack and is no longer down material. Another possibility is to repeat moves with 12…Nf6 13.Qf3 Nd5 14.Qe4 to draw.

The critical line analysis to 12.Qe4 is 12…g6 13.Nxd5 and now:
13…exd5 14.Qf3 Bh4 15.Kb1 Qf6 16.Qg2 Nd7 17.Rhf1=.
13…cxd5 14.Qf3 Nc6 15.c3 Bh4 16.Kb1 Qe7 17.Qf4=.
13…Qxd5 14.c4 Qxe4 15.Bxe4 Nd7 16.Bg2 Nb6 17.b3=.

After move 16 White was in deep trouble. He could not survive unless he attacked immediately. White must throw everything he has at Black and do it now! He had to hope Black would make a mistake when under pressure. On move 19, Black obliged. The evaluation changed from a win for Black to a win for White.

Teichmann 9.Bd3 is section 5.8 in my Blackmar-Diemer Games 1.

Hofmann (1812) - Grunert (1694), ch-GER Youth U25 2016 Willingen GER (9.33), 21.05.2016 begins 1.d4 Nf6 2.Nc3 d5 3.e4 dxe4 4.f3 exf3 5.Nxf3 Bg4 6.h3 Bxf3 7.Qxf3 c6 8.Be3 e6 9.Bd3 Be7 10.0-0-0 0-0 11.g4 Nd5 12.h4?! Nxc3 13.bxc3 Qd5 14.Qh3 Qxa2 15.g5 Nd7 16.h5 Nb6 17.Bxh7+ Kxh7 18.g6+ Kg8 19.h6 fxg6?? [A blunder that changes the evaluation from Black wins to White wins. Black has a mate in four. 19...Nc4! 20.gxf7+ Rxf7 21.h7+ Kh8 22.Rdf1 Qa1#] 20.hxg7 Kf7 [20...Qa1+ 21.Kd2 Nc4+ 22.Ke2+-] 21.Rdf1+ Ke8 22.Rxf8+ [22.gxf8Q+!+-] 22...Bxf8 23.gxf8Q+ Kd7 24.Qf7+ Kd8 25.Qh8# 1-0

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