Sunday, December 21, 2014

Caro-Kann Defence Slow Steady Advance

At every skill level the Caro-Kann Defence might be met by an Advance Variation with 3.e5. My favorite response as Black is to play 3...Bf5, getting the light squared bishop outside my pawn chain. This is followed by 4...e6 and eventually c6-c5, attacking White's d4 pawn. Below White plays the solid 4.Nf3 line along with a sharp counter attack of 7.c4 attacking my d5 pawn. Most games I play online are blitz games. Once in a while I have a slow go with an opponent like "SlowBo". Here a 25 minute game with 10 second increments, the game seems like an eternity.

Sundays I post a Caro-Kann Defence until Index 1.e4 c6 under Labels catches up with other openings (see lower right column in the web version of my blog). I try to keep the selection of openings balanced so we get board but not bored. I am happy to post games by my readers in any opening. When posting my own games, generally I have started with rare openings or less popular variations and gradually move toward the more popular. Thus in the Caro-Kann ECO codes (B10-B19), I have reached B12. Note that I also post a couple Blackmar-Diemer Gambits per week. I ended up outplaying this computer chess engine in a very good rook endgame.

SlowBo (1905) - Sawyer (2181), ICC 25 10 Internet Chess Club, 07.07.2007 begins 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6 5.Be2 Ne7 6.0-0 c5 7.c4 Nbc6 8.dxc5 d4 9.Qa4 Ng6 10.Qb5? [10.Rd1=] 10...Qd7 11.Rd1 Ngxe5 12.Nxe5 Nxe5 13.Qxd7+ Nxd7 14.c6 bxc6 15.Rxd4 Bc5 16.Rd1 0-0-0 17.g4 Bg6 [17...Bc2=/+] 18.Bg5 f6 19.Bh4 Ne5 20.Nc3 Rxd1+!? 21.Nxd1 [21.Rxd1 Rd8=/+] 21...Rd8 22.Kf1 Bd3 23.g5 Be7 24.gxf6 Bxf6 25.Bxf6 gxf6 26.Bxd3 Rxd3 27.b3 Ng4 28.Kg2 f5 29.b4 Rd2 30.a4 a6 31.b5 cxb5 32.axb5 axb5 33.cxb5 Kb7 34.h3 Nf6 35.Kf3 Nd5 36.h4 Rd3+ 37.Ne3 Nxe3 38.fxe3 Rb3 39.Rg1 Rxb5 40.Rg7+ Kc6 41.Rxh7 Rb4 42.h5 Rh4 43.Rh8 Kd5 44.h6 Ke5 45.h7 Rh6 46.Ke2 Ke4 47.Kf2 e5 48.Rc8 [Correct is 48.Kg3! Kxe3 49.Re8 f4+ 50.Kg4 Rxh7 51.Rxe5+ Kd4 52.Kxf4 Rf7+ 53.Rf5 Rxf5+ 54.Kxf5 with only two naked kings left on the board.] 48...Rxh7 49.Rc4+ Kd5 50.Rb4 Rh2+ 51.Kg3 Rc2 52.Ra4 Rc4 53.Ra3 [53.Ra2 Ke4=/+] 53...Ke4 54.Kf2 Rc2+ 55.Ke1 Rb2 [55...Kf3!-+] 56.Rc3? [56.Ra5! Rc2=/+] 56...Kf3 57.Kd1 e4 58.Ra3 Re2 59.Ra5 Kxe3 60.Rxf5 Rf2?! [60...Rd2+! 61.Ke1 Ra2-+] 61.Rb5? [Now the win is easy. White could make things more difficult with 61.Re5 Rf1+ 62.Kc2 Rg1=/+] 61...Rf1+ 62.Kc2 Ke2 63.Kc3 Rf8 64.Re5 e3 65.Kc2 Rc8+ 66.Kb2 Kf2 67.Rh5 e2 68.Rf5+ Ke1 69.Rf7 Rc5 70.Rd7 Kf2 71.Rf7+ Ke3 72.Re7+ Kd3 73.Re6 Rc4 74.Rxe2 Kxe2 75.Ka2 Kd3 76.Kb3 Rd4 77.Kb2 Rb4+ 78.Ka2 Kc2 79.Ka3 Rc4 80.Ka2 Ra4# 0-1

Copyright 2014 Tim Sawyer. Click here for my HOME PAGE.

Saturday, December 20, 2014

Blackmar-Diemer Avoided 3...c5 Yang Hainan

In the Blackmar-Diemer Gambit players battle for the center in many ways. Usually it involves pawns: the d-pawn and e-pawn, as well as the f-pawn and c-pawn. One line is like a reversed Albin-Counter Gambit after typically 1.d4 d5 2.e4 c5 3.Nc3 dxe4 4.d5. In a contest between Yang Hainan (2137) vs Chan Peng Kong (2264), the players transpose to this same position using the Veresov Opening move order of 2.Nc3.

The best continuation is line is 4...Nf6 5.Bg5. This game from the Hong Kong Open in China is in a critical line and pretty well played by both sides. White obtains a still edge which gradually grows as the game progresses. In BDG nomenclature, this 3...c5 line is called the Dries Variation.

Here is BDG move order theory for 2...c5 and 3...c5:
1.d4 d5 2.e4 c5 (This is a rare Sicilian Defence line)
2...dxe4 3.Nc3 Nf6 4.f3 c5 is a BDG Brombacher
2...dxe4 3.Nc3 c5 (Dries Variation transposes below)
Or 3.exd5 vs Bourne as well as 3.dxc5 by Jorgensen
3...dxe4 (Dries Variation)
If 3...e6 4.exd5 exd5 5.dxc5 +/-
Other tries are 4.Bb5+ or 4.Nge2, and there is:
4.Bf4 Qxd4 5.Nd5! 1-0 Gedult-Deverriere, France 1973
There is a possible trap after 4...e6 by Kluge
5.Bg5 Qb6 6.Qd2 (below)
Maybe 6.Bb5+!?
Or 6.b3 played by WFM Khlichkova

Yang Hainan (2137) - Chan Peng Kong (2264), Hong Kong Open 2014 (7.15), 04.10.2014 begins 1.d4 d5 2.Nc3 c5 3.e4 dxe4 4.d5 Nf6 5.Bg5 Qb6 6.Qd2 Nbd7 7.0-0-0 a6 8.Re1 h6 9.Bh4 g6 10.f3 exf3 11.Nxf3 Bg7 12.Bc4 Qb4 13.Bd3 0-0 14.a3 Qa5 15.Rxe7 c4 [Correct is 15...b5! 16.d6 c4 17.Be4 Nxe4 18.Nxe4 Qxd2+ 19.Nexd2=] 16.Bxc4 Qc5 17.Qe2 Nb6 18.Bf2 Qxc4 19.Bxb6 Qxe2 20.Rxe2 Bg4 21.Re7 Nd7 22.Bc7 Bf6 23.Ree1 Bxc3 24.bxc3 Bxf3 25.gxf3 Rfe8 26.Kd2 Rec8 27.d6 Nc5 28.Re7 Kf8 29.Rhe1 Ne6 30.R1xe6 fxe6 31.Rxe6 Rxc7 32.dxc7 Kf7 [32...Rc8 33.Rxg6 h5 34.Rh6 Rxc7 35.Rxh5+/-] 33.Rb6 Rc8 34.Rxb7 g5 35.Ke3 Ke6 36.Ra7 Kd5 37.Kd3 Kc5 38.Rxa6 Rxc7 39.Rxh6 Rf7 40.Ke4 Re7+ 41.Kd3 Rf7 42.Ke3 Re7+ 43.Kf2 Ra7 44.Rg6 Rxa3 45.Rxg5+ Kd6 46.Rg2 [46.c4! Rc3 47.c5+ Kc6 48.h4 Rxc2+ 49.Kg3+-] 46...Rxc3 47.Kg3 Ke5 48.Kg4 Rc8 49.Re2+ Kf6 50.h4 Rg8+ 51.Kf4 Rh8 52.Rh2 Rg8 53.h5 Kg7 54.h6+ [Getting rid of the rooks with 54.Rg2+! Kf8 55.Rxg8+ Kxg8 56.Ke5+- wins far more easily.] 54...Kh7 55.Ke3 Re8+ 56.Kd2 Rd8+ 57.Kc1 Rf8 58.Rh3 Rc8 59.f4 Rc4 60.Rh4 Rc8 61.Kd2 Rd8+ 62.Ke3 Re8+ 63.Kf3 Rc8 64.Rh2 Rc4 65.Kg4 Rc5 66.f5 Rc3 67.Kg5 [67.f6!+-] 67...Rg3+ 68.Kf6 Kg8 69.c4 Rc3 70.Rh4 Rc1 71.Ke6 Re1+ 72.Kd6 Rd1+ 73.Kc6 Rf1 74.Rh5 Kh7 75.c5 Rc1 76.Kd6 Rd1+ 77.Kc7 Rc1 78.c6 Rc2 79.Kd7 Rd2+ 80.Kc8 Rc2 81.c7 Rc1 82.f6 1-0

Copyright 2015 Tim Sawyer. Click here for my HOME PAGE.

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