Sunday, August 31, 2014

Dutch Defence Leningrad Hit and Run Bishop

Move order in Dutch Defence Leningrad variations is very flexible. You can almost blitz your first half dozen moves without even looking at what your opponent is doing unless he invades your side of the board. Ignacio M. Elguezabal sets up a double fianchetto with excellent bishop play in our 1989 USCF Golden Knights Postal Chess Tournament. My opening was good, but my positional handling of the d- and e-files was insufficient. Once we got to the middlegame, I foolishly failed to focus on the center.

Transpositions with the White pieces abound. For example 1.d4, 1.c4, 1.g3 or 1.Nf3 can all reasonably reach the same position if Black is a dedicated Dutch player. Black has less flexibility in the Leningrad. Obviously he has to play 1...f5 before 2...Nf6 and he has to play 3...g6 before 4...Bg7. All four of those moves before 5...0-0, while 6...d6 can be played at any point in the first six moves. Here White delayed c4 until move 9. As our battle ensued, I failed to control the d-file. White's dark squared bishop won with a hit and run: 7.Bb2 (taking aim), 28.Bxd4 (grabbing my knight) and 31.Ba1 (safe retreat).

Elguezabal - Sawyer, corr USCF 1990 begins 1.d4 f5 2.g3 Nf6 3.Bg2 g6 4.Nf3 Bg7 5.0-0 0-0 6.b3 [6.c4 d6 7.Nc3] 6...d6 [6...Ne4=] 7.Bb2 Qe8 8.Nbd2 Nc6 9.c4 e5 10.dxe5 [10.d5=] 10...dxe5 11.e4 f4 12.Qe2 fxg3 13.fxg3 Bg4 [13...Qe7=/+] 14.h3 Bxf3 15.Nxf3 Nh5 16.Kh2 Qe7 17.Rad1 Rad8 18.Rd5 Nf6 19.Rxd8 Rxd8 20.Rd1 Re8?  [20...Rxd1! 21.Qxd1 Qd6=] 21.a3 Nd7 22.b4 b6 23.Qd2 Nf8 [Black loses more slowly with 23...Nd4 24.Nxd4 exd4 25.Bxd4 Bxd4 26.Qxd4+/=] 24.Qd5+ Qe6 25.Ng5 Qxd5 26.exd5 Nd4 27.d6 cxd6? 28.Bxd4 h6 29.Bd5+ Kh8 30.Nf7+ Kh7 31.Ba1 1-0

You may also like: King Pawn (1.e4 e5) and Queen Pawn (1.d4 d5)
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Saturday, August 30, 2014

Martin Simons vs Brown in BDG

Martin Simons takes a Caro-Kann Defence vs Thomas Brown and transposes to a Blackmar-Diemer Gambit. After the normal 3.Nc3 dxe4, these expert players chose 4.Bc4 Nf6 5.f3 exf3 6.Nxf3 Bf5 which is a BDG Ziegler. I take the occassion of this game to take a fresh look at the critical line 7.0-0 e6 8.Ne5 for my chess blog.

How can you know if I have written on a specific BDG line? Here is how you can find out. If you click on words Blackmar-Diemer Gambit highlighted in blue, that will take you to my Online BDG Keybook lists of links. In the case of today's game, you would scroll down the list to the 5.Nxf3 c6 6.Bc4 Bf5 variation; click on that. Then you have other links to similar game posts with alternatives on moves seven and eight.

In the British Championship, our hero Martin Simons faced four distinct BDG variations though some from the Caro-Kann Defence after 1.e4 c6. The normal BDG move order would be 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 and now:
4...e3 5.Bxe3 in Simons-Taylor (my 9/4/2014 post).
4...Bf5 5.g4 in Simons-Brusey.
4...c6 5.Bc4 in Simons-Elwin.
4...exf3 5.Nxf3 c6 6.Bc4 in Simons vs Brown below.

Simons (2087) - Brown (2104), 101st ch-GBR 2014 Aberystwyth WLS (9.24), 28.07.2014 begins 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Bc4 Nf6 5.f3 exf3 6.Nxf3 Bf5 7.0-0 e6 8.Ne5 Bg6 9.g4 Nbd7 10.Nxg6 hxg6 11.g5 Qc7 [11...Nb6! ("?" Scheerer) 12.Bxe6 fxe6 13.gxf6 gxf6 14.Qg4 (Scheerer stops here) 14...Be7! (New Engine, Houdini) 15.Qxe6 Qxd4+ 16.Kg2 Qe5-/+ which threatens to swap queens in view of the attack on h2, and Black remains up a pawn.] 12.Bf4 Bd6 13.Bxd6 Qxd6 14.Rf2 Rh4 [Stockfish at 35 ply. Or 14...Nh7 15.Ne4 Qe7 16.Qg4 Nb6 17.Bb3 Nd5 (Andrew Martin; Houdini analyzes:) 18.Re1 O-O-O 19.c4 f5 20.gxf6 Ndxf6 21.Nxf6 Nxf6 22.Qxe6+ Qxe6 23.Rxe6 Rxd4 24.Re7 g5 (or 24...Rd7 25. Rxd7 Kxd7 26. Rg2 Rh6 27. Bc2=) 25. Rg2 Ne4 26. Rxg7= White regains the gambit pawn.] 15.gxf6 Nxf6 [15...gxf6=/+ Stockfish] 16.Be2 0-0-0 17.Bf3 g5 18.Qd2 g4 19.Bg2 [19.Be2=] 19...g3 20.hxg3 Qxg3 21.Ne2 Qg6 [The crushing move is 21...Rh1+! 22.Kxh1 Qxf2 23.Qd3 Rh8+ 24.Bh3 Ng4 25.Qg3 Qxe2 26.Kg1 Qe3+ 27.Qxe3 Nxe3-+ and Black will be up three pawns in the endgame.] 22.Qd3 Qh6 23.Qg3 Rg4 24.Qh2 Qe3 25.Kf1 Rgxd4 26.Nxd4 1/2-1/2

You may also like: King Pawn (1.e4 e5) and Queen Pawn (1.d4 d5)
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Friday, August 29, 2014

Ray Haines in Colle vs Queen's Indian 5...Ba6

Ray Haines frequently plays his chess friend Roger Hardison in club and tournament games. Previously in a Colle System vs Queen's Indian, Black played his queenside bishop to ...Bb7. In today's game, Roger Hardison chooses another popular Queen's Indian option in 5...Ba6 to exchange White's good bishop on d3. The Queen's Indian Defence set-up vs 1.d4 involves playing a combination of the moves ...Nf6, ...e6, and ...b6. These the pawns cover d5 and c5 while the actual placement of Black's d-pawn and c-pawn remain very flexible, as does the development of Black's bishops.

In this game, however, it is White's d-pawn and c-pawn that tell the story. The initial opening fight is over e4. It is logical for Black to trade bishops, but this game shows that White may advance his e-pawn quickly once these light squared bishops are gone. The move 9.e4 frees White's dark squared bishop to enter the fray. Ray Haines started with a slow queenside expansion of White pawns in 1.d4 and 4.c3, but his prospects grow as these pawns advance. Once White has passed pawns on d6 and c5, Black is lost.

Haines - Hardison, Presque Isle, Maine, 26.06.2014 begins 1.d4 Nf6 2.e3 e6 3.Bd3 c5 4.c3 b6 5.Nf3 Ba6 6.0-0 Be7 7.Na3 Bxd3 8.Qxd3 0-0 9.e4 d6 [9...d5!=. With only his dark squared bishop left, Black should place his center pawns on light squares.] 10.Rd1 [10.d5+/=] 10...Nbd7 11.Be3 Rc8 12.e5 dxe5 13.dxe5 Nd5 14.c4 Nxe3 15.Qxe3 Qe8 16.Rd2 Nb8 17.Rad1 Nc6 18.Nb5 a6 19.Nd6 Bxd6 20.Rxd6 Rd8 21.Qe4 Nd4 [Black is going to lose a pawn one way or the other. If 21...Rxd6 22.Rxd6 Ne7 23.Rxb6+/-] 22.Nxd4 Rxd6 23.exd6 cxd4 24.Qxd4 Qc6 25.b3 Rd8 26.h4 Rd7 27.h5 h6 28.b4 Kf8 29.c5 b5 30.Rd3 Kg8 31.Rg3 f5 32.Qe5 Qd5 33.Qxd5 exd5 34.Rd3 [34.Rg6! Kf7 35.c6+- also wins quickly.] 34...a5 35.a3 axb4 36.axb4 1-0

You may also like: King Pawn (1.e4 e5) and Sicilian (1.e4 c5)
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Thursday, August 28, 2014

Brad's Stutter-Step Bishop

Steffen Gampper asked me about a Blackmar-Diemer Gambit variation:

"hi Tim thx for the great Blog about the BDG!
"I work now a rep against the BDG 
"What you think about this line in the Gunderam?
"1.d5 d5 2.e4 dxe4 3.Sc3 Sf6 4.f3 exf3 5.Sxf3 Lf5 6.Se5 Le6! and later c6
"Did you have this on chessboard, cheers Steffen Gampper

Francesco Cavicchi added: "Be6 seems interesting... in Rausis-style (see the Queen's Gambit Accepted, there's a similar concept)."

These comments by Steffen and Francesco remind me of my early BDG days when I played my friend Brad Winter. He was not a tournament player, so there was no danger of him "preparing" to face my openings. Brad just liked to play chess. One game saw Black play the BDG Gunderam with 4.f3 exf3 5.Nxf3 Bf5. After White's normal reply of 6.Ne5 (threatening 7.g4), Black retreated his bishop back to 6...Be6. Our game was Game 511 in my original Blackmar-Diemer Gambit Keybook published by Thinkers Press in 1992. I consider the 7...c6 idea in a note below. I have played the BDG over 3000 times and faced this dynamically equal 6...Be6 line only once. Here goes:

Sawyer (1981) - Winter, Horsham PA, 1987 begins 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bf5 6.Ne5 Be6 7.Bf4 [Another game continued: 7.Bg5 Nc6 8.Nxc6 bxc6 9.Bxf6 exf6 and 1/2-1/2 in 31. Manaschev-Genty, LADAC 2005] 7...Nc6? [Houdini analyzes 7...c6 8.Nf3 (8.Bc4!?) 8...g6 9.Qd2 Bg7 10.0-0-0 Nd5 11.Nxd5 cxd5 12.Bh6 Bxh6 13.Bb5+ Bd7 14.Bxd7+ Qxd7 15.Qxh6 Nc6 16.Qg7 0-0-0 17.Qxf7 Rdf8 18.Qg7 Qg4 19.Ne5=] 8.Bb5 a6 9.Nxc6 bxc6 10.Bxc6+ Bd7 11.Bxa8 Qxa8 12.0-0 Ne4? 13.Qf3! Bc6 14.d5 Nxc3 15.dxc6 Nb5 16.Rad1 e5 17.Bxe5 Bd6 18.Bxg7?! [He attacks my bishop; I attack his rook. Playing moves instantly, I missed the mate in two, for a moment. 18.Qxf7+ Kd8 19.Qd7#] 18...Rg8 19.Qxf7+ Kd8 20.Qd7# 1-0

You may also like: King Pawn (1.e4 e5) and Queen Pawn (1.d4 d5)
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Wednesday, August 27, 2014

Corey Acor Wins London System

Corey Acor was a teenage USCF Master whom I played three times in tournaments. Our first meeting was a London System in the Florida State Championship the previous year. In both games Corey Acor played the King's Indian Defence set-up. In all our games, I played well and then missed a key move in a critical position. Acor avoids drawish lines and plays for a win. Like many chess masters, he complicates the position but keeps it flexible enough to allow for many critical options. Acor has a preference for positions that make use of his tactical skills and his ability to play quickly.

With a win and draw after two rounds in this event, I was tempted to play 2.f3 and head for a Blackmar-Diemer Gambit, but he is better at tactics than I am. In blitz play, I did get a draw with a BDG Euwe vs Acor in 2009, but normally Corey Acor outplayed me in every game. I figured at tournament speed that I had a better chance in an endgame, but Corey Acor keeps the middlegame going for a long time.

Sawyer (1946) - Acor (2283), Southern Open (3), 28.07.2007 begins 1.d4 Nf6 2.Nf3 d6! 3.c3 [Rather slow which shows the lack of confidence in my opening preparation for this event. The first time we played, I continued directly to the London with 3.Bf4!? which in hindsight would have been good to do again.] 3...g6 4.Bf4 Bg7 5.h3 [To retreat the bishop if necessary.] 5...b6 6.e3 Bb7 7.Be2 Nbd7 8.0-0 Nd5 9.Nbd2 [I tried to set-up and fortress that Black would have a hard time breaking through. This proves futile. It would be better to keep the bishop with 9.Bh2=] 9...Nxf4 10.exf4 e6 11.Re1 Qf6 12.g3 0-0 13.Bf1 Rfe8 14.Bg2 Rad8 15.Qa4 a5 16.Rad1 Ba8 17.a3 Qe7 18.Qc2 [Worth a try is 18.Nh2=] 18...Nf6 19.Qa4 h6 20.Qc2 Rb8 21.Qa4 Rec8 22.Rc1 c5 23.Qd1 Bc6 24.Qe2 Qb7 25.Nh4 cxd4 26.cxd4 Nd5 27.Nhf3? [Now things go bad. Very promising was 27.Nxg6! fxg6 28.Qxe6+ Kh7 29.Rxc6 Qxc6 30.Bxd5=] 27...Qd7 28.Qd3 Bb5 29.Qb1 f5 30.Rxc8+ Rxc8 31.Rc1 Kf7 32.h4 Bd3 33.Qa1 Rc6 34.Rxc6 Qxc6 35.Qd1 Qb5 36.Qa1?!  [36.Qc1! Be2=/+] 36...Qc6 37.Qd1 Ba6 38.Bf1 Bxf1 39.Qxf1 b5 40.Kh2 Nf6 41.Qd3 Ne4 42.Kg2 Qd5 43.Qb3? [This loses, but White might be able to survive with 43.Qc2 or 43.Nf1] 43...Nxd2 44.Qxd5 exd5 45.Nxd2 Bxd4 46.b3 a4 0-1

You may also like: King Pawn (1.e4 e5) and Sicilian (1.e4 c5)
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Tuesday, August 26, 2014

Four Move Rook Journey in BDG Vienna

PII233Crafty would let me play the Blackmar-Diemer Gambit in blitz games on the Internet Chess Club back in the late 1990s. Generally, my highest ratings come when I play the same few opening variations all the time, but I do not always feel like doing that. In 1998, I did. I played the BDG daily and my rating went way up.

This BDG Vienna saw us meet the BDG Declined with 4.f3 Bf5 5.fxe4 (instead of 5.g4) 5...Bxe4 (more common is 5...Nxe4) 6.Nxe4 Nxe4 7.Bd3 e6! (humans often miss this but computers often find it). My response was to play 8.Nf3 and sacrifice the Exchange on the queenside. The hope is to work up a kingside attack. Notable in this game is the four move rook journey from 13.0-0, 14.Rb1, and 15.Rb5 to 16.Rh5. Alas, I missed the drawing continuation 18.Ng5! which could lead to a repetition of moves.

Sawyer (2420) - PII233Crafty (2784), ICC 5 0 Internet Chess Club, 04.10.1998 begins 1.d4 Nf6 2.Nc3 d5 3.e4 dxe4 4.f3 Bf5 5.fxe4 Bxe4 6.Nxe4 Nxe4 7.Bd3 e6! [The best move which threatens ...Qh4+!, however Black more often retreats the knight with 7...Nf6] 8.Nf3 [8.Ne2 solidifies c3, but it does not support a quick kingside attack.] 8...Bb4+ 9.c3 Nxc3 10.bxc3 Bxc3+ 11.Bd2 Bxa1 12.Qxa1 Nc6 [If Black chooses to castle queenside with 12...Qd7 13.0-0 (13.Ne5!?=) 13...Nc6 14.Bc3 0-0-0 15.Qb2= White has open lines and some attacking chances.] 13.0-0 0-0 14.Rb1 Rb8 15.Rb5 Qd6 16.Rh5 g6 17.Rh6 e5 18.Be3? [White could reach a draw after 18.Ng5! Qxd4+ 19.Qxd4 exd4 20.Nxh7 Rfd8 21.Rh3 Ne5 22.Bg5 Nxd3 23.Nf6+ Kg7 24.Rh7+ Kf8 25.Nd7+ Kg8 26.Nf6+ Kf8 27.Nd7+ repeating moves.] 18...Qa3 19.Qd1 e4 20.Ng5 Qxd3 21.Qxd3 exd3 22.Nxh7 Rfd8 23.Nf6+ Kg7 24.Bg5 Rxd4 25.Rh7+ Kf8 26.Rh8+ Ke7 27.Nd5+ Kd7 28.Nf6+ Ke6 29.Rxb8 Nxb8 White resigns 0-1

You may also like: King Pawn (1.e4 e5) and Queen Pawn (1.d4 d5)
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Monday, August 25, 2014

Index: Blackmar-Diemer Gambit 4...Bf5 5.g4 6.g5

This Index on the Blackmar-Diemer Gambit Vienna Defence 4.f3 Bf5 is a very popular line. When White plays the 5.g4 (Hara-Kiri) line, the most common continuation is 5...Bg6 6.g5 covered below. The basic choice for White after the normal 6...Nd5 is between the 7.Nxe4 Tartakower Variation or the 7.fxe4 Kampars Gambit. A previous index covered 5...Bg6 6.h4 and other early alternatives. In future BDG Vienna indexes we will consider the Diemer variations after 5.fxe4.

This variation begins 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.g4 Bg6:
6. g5 Nh5 7.fxe4
6.g5 Nd5 and now:
7.fxe4 Nxc3 8.bxc3 Bxe4 9.Nf3 e5
7.fxe4 Nxc3 8.bxc3 Bxe4 9.Nf3 e6
7.Nxe4 Nc6 8.c3
       7...e6 8.c4 Ne7 9.Ng3
Last Revised April 4, 2015.

You may also like: King Pawn (1.e4 e5) and Queen Pawn (1.d4 d5)
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