Saturday, June 21, 2014

Critical Blackmar-Diemer Bogoljubow 6.Bc4

Today we look at a critical Blackmar-Diemer Gambit line in the popular 5.Nxf3 g6 6.Bc4 Bg7 7.0-0 0-0 8.Qe1 Bogoljubow Studier Variation. This game is played by two strong correspondence masters Walter Trumpf vs Steen S. Vestergaard. ICCF permits computer use, so to get ratings around 2400 is when your opponents have such assistance is very impressive. As Robin Smith has pointed out, the stronger players still win most of the time when everyone is using computers. Top players understand what analysis to follow and when to follow it. Trumpf is a well known expert in the Blackmar-Diemer Gambit. I never played him in correspondence; I might have played him in blitz under a different handle. I did play Vestergaard in postal chess 30 years ago in 1984. Back then personal computer chess engines were very weak and not any help in move selection. That is the year I bought my first home computer, a classic Commodore 64. I kept it for years and used it to write my first chess book.

In the game below after 8...Nc6 9.Qh4 Bg4 10.Be3 Bxf3 11.Rxf3 e5 White chooses 12.Rd1 Nxd4 13.Rf2 as I did in my game vs Tom Purser. Vestergaard shows the best reply 13...b5! This move is not well-known outside of BDG circles. I searched one database with about 5 million games and it turned up with no games found in this line. It has been known to BDGers for many years. Peter Leisebein and Michael Preussner drew two correspondence games vs each other in 1997, one with each color. There followed Tinture vs Efendiyev, 0-1 in 30 in 1998; and Grott vs Leisebein, 0-1 in 23 in 1999. Most of the early games continued 14.Bxd4. Grott was the first to try 14.Bxb5.

All 128 games in my database with 13...b5 were either correspondence or computer games. White scored +32, =25, -71 in one of the most critical lines of the entire BDG. Yet, never have I seen a human player reach this position in tournament or in blitz play. I imagine it has happened, but I do not expect any of my human opponents to get to this position, let alone play 13...b5! Playing the BDG for years limited the rating of Walter Trumpf to "only" 2429, but most of us would live happily with that rating!

Trumpf (2429) - Vestergård, (2343), WCCC30SF03(WS) ICCF, 20.06.2006 begins 1.d4 Nf6 2.Nc3 d5 3.e4 dxe4 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.0-0 0-0 8.Qe1 Bg4 9.Qh4 Nc6 10.Be3 Bxf3 11.Rxf3 e5 12.Rd1 Nxd4 13.Rf2 b5! 14.Bxb5 [Another popular choice as been 14.Bxd4 exd4 15.Nxb5 c6 when has tried both 16.Nc3 and 16.Rxd4 several times.] 14...Nd5 15.Bg5 [More common has been 15.Qe4 Nxe3 16.Qxe3 Qh4] 15...f6 16.Bc4 Kh8 17.Bxd5 fxg5 18.Rxf8+ Qxf8 19.Qxg5 [Best play seems to be 19.Qe1 Nxc2 20.Qe4 Qc5+ 21.Kh1 c6 22.Bxc6 Rf8 23.Qxc2 Qxc6 24.h3 Rf4 25.Rd8+ Bf8 26.Kh2 g4 27.Qe2 Qc7 28.Rc8 Qxc8 29.Qxe5+ Bg7 30.Qxf4 gxh3 31.gxh3 h5 32.Qg3 Kh7 33.Qf2 a6 34.Kg2 Qb7+ 35.Kg1 Be5=+] 19...Rd8 20.Qe3 Nxc2 21.Qxa7 e4 22.Qf2 Bd4 23.Rxd4 Qxf2+ 24.Kxf2 e3+ 25.Ke2 Nxd4+ 26.Kxe3 Nb5 27.Nxb5 Rxd5 28.a4 c6 29.Nc3 Rd8 30.b4 Kg7 31.a5 Kf6 32.Na4 Ke6 33.g3 Kd6 34.h4 Rb8 35.Nb6 Kc7 36.g4 Re8+ 37.Kd4 Re2 38.g5 Rh2 39.Kc5 Rh1 40.a6 Rc1+ 41.Nc4 Kb8 42.b5 cxb5 43.Kxb5 Rh1 44.Ne5 Rxh4 45.Kc6 Rh5 46.Nf7 Ka7 47.Kd6 Kxa6 48.Ke6 Kb5 49.Kf6 Kc4 0-1

You may also like: King Pawn (1.e4 e5) and Queen Pawn (1.d4 d5)
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  1. Hi Tim, Tom Purser wrote an article in this line in his old "Tom´s BDG Pages" (if I remember correctly), it was in the old website, not in the blog that he created later.

    It was called something similar to "BDG´s Death, the reports has been greatly exaggerated" and then ending was very nice: "even when one of the BDG´s branch is death, like the hydra, a new variation will emerge to replace that line, BDG is alive!".

    Well, now we have Bf4 and Bg5, so, that forecast was correct :)

    1. Yes, the Bogo is good, but White has many bishop move options, we preparing for Black vs the rare BDG would be tough in most cases.


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