Wednesday, April 29, 2009

Gambits and Pieces

In the Vienna Defense to the BDG, after 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.fxe4 Nxe4 6.Qf3 Nxc3 7.bxc3, Black has a number of possibilities, with 7…Qc8, holding both b7 and the Bishop at f5, being most often played. However,  Bc8?! is played now and then: 


Jyrki Heikkinen in his blog, Gambits and Pieces, writes about one such game which he played.

“White's obvious target is the f7 square. Without knowing the theory recommendation 8.Bc4 e6 9.Nh3, I … played a prophylactic move.”

What was this move? See the game at Gambits and Pieces: My shortest checkmate in BDG. And while you’re there, have a look around Jyrki’s blog. There’s more there than the BDG. It’s “the world of crazy gambits: Diemer–Duhm, Blackmar–Diemer, Staunton, Fajarowicz and more.”

Sunday, April 26, 2009

Blackmar-Diemer Gambit Variations

Chess, like love, is a many-splendored thing. We can enjoy it on so many different levels. “Serious” chess, skittles, blitz, correspondence, problems, history, variants, and more. We play it, watch it, read about it, dream about it, argue about it. One aspect that seems to attract many is the naming of variations. We can always find some good arguments there.

A reader put me onto a site which does a good job at outlining BDG variations. The variations are named, provided a diagram, and Rybka evaluations of the four leading responses. (This is interesting, if of limited utility). Here’s an example:


Take a look at the site here. The proprietor is Knut Jarle Hjørnevik from Norway, a fairly strong player with a Fide rating of 2038, who has been playing the BDG for a year or so now. You might quibble with a name or two, but that’s part of the fun.

Friday, April 24, 2009

Lost Opportunities

This week’s TWIC contained several BDGs, and White didn’t fare so well—but not so much through any fault of the opening. Chess is like this, certainly when played below the master level, but even there too, more often than we like to think. Games seesaw back and forth and one side is up, then down. Small inaccuracies, large blunders, all come and go. Tartakower’s rule about the next-to-last mistake still applies.

Summers,Charles - Young,Al (2018)
ch-WLS Cardiff WLS (1), 10.04.2009
BDG, Euwe Defense

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 6.Bg5 Be7 7.Bd3 c5 8.dxc5 Qa5 9.0-0 Qxc5+ 10.Kh1 Nbd7 11.Qe1 a6 12.Qh4 Qb4

[12...h6 13.Rae1 b5 14.Ne4 Nxe4 15.Bxe7 Qxe7 16.Qxe4 Rb8 17.Ne5 Bb7 18.Nc6 Bxc6 19.Qxc6 1/2-1/2 Leisebein,P-Price,B/IECC email 2004]
[13.Nd4 Qxb2 14.Nce2 Ne5 (14...h6 15.Be3 Nd5 16.Qf2 Ne5 and Black is better, although he later blundered and lost, Nicholls,M-Zaniratti,I/ICCF Email 2001 (29)) 15.a4 Qb6 16.Rxf6 Nxd3? (16...gxf6 17.Bxf6 Qd8-+) 17.Rff1 f6 18.Be3 Nc5 19.Nb3 Qc6? (19...e5) 20.Bxc5 Bxc5 21.Qh5+ 1-0 Sneiders,E-Breunig/corr 1971]
13...0-0 14.a3 Qg4 15.Rd1 h6 16.Bh4 Re8 17.h3 Qh5 18.b4 g5 19.g4 Nxg4 20.hxg4 Qxg4 21.Bg3 Nf6 22.Ne5 Qh3+ 23.Bh2 b6 24.Qg3 Bb7+ 25.Kg1 Qxg3+ 26.Bxg3 Nh5?

[Such a shame. White foregoes an immediate win with 27.Rxf7 Ng7 Just about forced, but no salvation (27...Nxg3?? 28.Bh7+ Kh8 29.Ng6#) 28.Rdf1 h5 (to prevent Ng4) 29.Rxg7+! Kxg7 30.Rf7+ Kh8 31.Rh7+ (Or 31.Bh7 Rg8 32.Ng6+ Rxg6 33.Bxg6) 31...Kg8 32.Nf7 Bf8 33.Be5 Re7 34.Bg6]
27...f5 28.Be2 Ng7 29.Na4 Rac8 30.c4 Bd8 31.Rd7 Be4 32.c5 b5 33.Nc3 Ba8 34.Bf3 f4 0-1

Play through this game here.

Sunday, April 19, 2009

The Halosar Trap Again

Still restoring the hard drive. Meanwhile, here's a new video on the best-known (at least to BDG players) trap in the Blackmar-Diemer: In case the embedded video isn't showing, you can find it on YouTube here. By the way, for anyone else unaware of the correct pronunciation, Diemer rhymes with dreamer, not dimer.

Tuesday, April 14, 2009

Hard Drive Miseries

I had a hard drive go belly up over the weekend. Fortunately I have an off-site backup, but it will be a few days till I get the drive replaced. In the meantime, here's a position from a recent BDG. How should it go from here?

r2qr1k1/pp1nbppp/2p1p1b1/4N1Bn/3P3Q/2NB1R2/PPP3PP/3R2K1 w - - 0 15

White to move after 14...Nh5

I'll post the complete game later.

Wednesday, April 8, 2009

One Last BDG from the US Amateur Team East

Okay, one more game from the US Amateur Team. Last one. Positive.

Barnes,John (1847) - Nicely,Aaron T (1766)
US Amateur Team-ch East Parsipanny USA (2), 14.02.2009
BDG, Tartakower-Gunderam Defense

1.d4 Nf6 2.Nc3 d5 3.e4 dxe4 4.f3 exf3 5.Nxf3 Bf5 6.Ne5 e6 7.g4 Bg6 8.Qf3 c6 9.g5 Qxd4

More common Black moves here are 9...Nd5/d7/g8 and 9...Bh5. The text gives up a piece for a pawn mass that might prevail in an endgame.

10.Nxg6 hxg6 11.gxf6 gxf6 12.Be3 Qe5


[12...Qh4+ 13.Bf2 Qg5 14.Ne4 Qa5+ 15.c3 Nd7 16.Nxf6+ Nxf6 17.Qxf6 Rh5 18.Bd3 Re5+ 19.Kd2 Rd8 20.Kc2 Rxd3 0-1 Adams,S-Tan,K/Singapore ch prelims 1996/[Adams] (26)]

13.0-0-0 Nd7

[13...Qxe3+ 14.Qxe3 Bh6 15.Qxh6 Rxh6 16.Ne4 Ke7 17.Nd6 b6 18.Nc8+ Ke8 19.Bg2 f5 20.Rd2 Kf8? 21.Rd8+ 1-0 Peilen,M-Andre,K/cr 1986 (23)]

14.Kb1 Rh4 15.Bg2 Bg7 16.Rhe1 Qa5 17.Qg3 Rb4 18.Qd6 Rd8 19.Rd3 Bf8 20.Qg3 Ne5 21.Rxd8+ Kxd8 22.Rd1+ Ke8 23.Bc1 Nc4 24.b3+- 

[24.Qb8+ is crushing. Black's Queen is immobilized by the need to prevent mate at d8; for example: 24...Ke7 25.b3 Bg7 a) 25...f5 26.Bg5+ f6 27.Bxf6+ Kxf6 28.Qxf8+ Kg5 29.Qe7+ Kg4 30.h3+ Kh5 31.Bf3+ Kh6 32.Qh4+ and mates.; b) 25...c5 26.Bf4 (threatening Bc7) 26...Ne5 (26...e5 27.Nd5+) 27.Bxe5 fxe5 28.Nd5+ exd5 29.Qxe5+ mates; 26.a3 Nxa3+ 27.Bxa3]

24...Ne5 25.Qf2 Bg7 26.Qd2 Rg4 27.Bb2 Qc7 28.Ne4 Kf8 29.h3 Rh4 30.Qf2 

[30.Bxe5! fxe5 31.Qg5 wins the Rook.]

30...Rh5 31.Qxa7 Nd7 32.Qa8+ Nb8 33.Ba3+ Kg8 34.Bd6 1-0

To play through the games or download PGN file go here.

Saturday, April 4, 2009

Yet Another BDG from the US Amateur Team East

An encounter with a BDG avoided (in the form of a Hübsch Gambit) in the first round of this event left a bad taste in Bruce Miller's mouth, but he persevered and was rewarded with this win in round five. (The ratings are USCF).

Miller,B (1811) - Felber,J (2040)
US Amateur Team-ch East Parsipanny USA (5), 16.02.2009
BDG, Bogoljubov Defense

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 Nh5 12.Raf1 Bf6 

[12...Bxd4 13.Bxd4 (13.Nd5? Bxe3+ 14.Rxe3 e6 15.Nf6+ Nxf6 16.Rxf6 Kg7 0-1 Reinhard-Schilling/cr 1986) 13...Qxd4+ (13...Nxd4 14.Rxf7 Rxf7 15.Rxf7+/-) 14.Qxd4 Nxd4 15.Rxf7+/-]


[13.Rxf6?! Nxf6 14.Rxf6 exf6 15.Nd5 Kg7 16.Bh6+ Kh8 17.c3 g5 18.Qh3 Rg8 19.Bd3 Qxd5 20.Bxg5 Rg7 21.Bxf6 h5 22.Qg3 Rag8 23.c4 Qe6 24.Qg5 Qe1+ 25.Bf1 Qe4 26.Qxh5+ Qh7 27.Qxf7 Qh6 28.d5 Nd8 29.Qe7 Qf4 30.c5 Kh7 31.Bd3+ Kh6 32.Bxg7+ Rxg7 0-1 Porrasmaa,T (2182)-Hautala,R (2201)/Kuopio 2000/EXT 2001]  

13...Qd7 14.Nd5 Na5 15.Nxf6+ Nxf6 16.Rxf6 Nxc4??

[Black's best defense is 16...exf6 17.Qxf6 Nc6+/- 18.d5 (White can't play 18.Bh6 because of 18...Qxd4+ forcing a Queen trade.) 18...Qe7 19.dxc6 Qxe3+ 20.Kh1 Qe8 21.h4 bxc6 (21...h5?? 22.Qxg6+; 21...Qxc6 22.Bxf7+) 22.h5 Qd8 23.Bxf7+ Rxf7 24.Qxf7+ Kh8 25.Qf6+ (25.hxg6 Qh4+ 26.Kg1 Qd4+) 25...Qxf6 26.Rxf6+-]

17.Rxf7+- Qe8 18.Rxf8+ Qxf8 19.Qe2 1-0

[19.Qe2 Nxe3 20.Rxf8+ (20.Qxe3?! Qg7+/-) 20...Kxf8 21.Qxe3+-]

Play through this game or download it in PGN here.