Showing posts with label Caro-Kann Exchange. Show all posts
Showing posts with label Caro-Kann Exchange. Show all posts

Wednesday, 21 May 2025

London League

PLAYED on board five (of eight) for Battersea against Dulwich in London League Division Two last night.

Haran Rasalingam (2011) - Spanton (1960)
Réti/Caro-Kann Exchange
1.Nf3 c5 2.e3 Nc6 3.d4 cxd4 4.exd4 d5
This position occurs 6,046 times in ChessBase's 2025 Mega database - the Caro-Kann move-order would be 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Nf3 Nc6
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5.Bd3
Stockfish17 and Dragon1 suggest 5.c4!?, when we are in the territory of the Panov-Botvinnik Attack.
5...Nb4!? 6.Be2 Bf5 7.0-0!?
Apparently a novelty.
How should Black respond?
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7...Qb6?
Both 7...Nc2?? and 7...Bxc2?? lose a piece to 8.Bb5+ etc, but the text is also bad. I should have remembered Chess Tip Of The Day 37:
I find it a fairly reliable rule never to play Qb3 (or ...Qb6) early in any opening unless the queen goes there with a threat.
Cecil Purdy, Fine Art Of Chess Annotation And Other Thoughts - Volume Two
The engines suggest 7...e6, 7...Nf6 or 7...a6!?
8.Nc3
White is better after this, according to the engines, but they reckon White is winning after 8.c4!?, eg 8...e6 9.Nc3 Nf6 (9...Ne7 may be a slight improvement) 10.c5!? with an initiative.
8...Nf6
Grabbing a pawn with 8...Nxc2?? is still a blunder, thanks to 9.Bb5+, and 8...Bxc2?! looks incredibly risky, eg 9.Qd2 Be4 10.Ne5, with Black behind on development and unlikely to castle anytime soon.
9.Bf4 Rc8?
Better is the natural 9...e6.
How should White proceed?
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10.Qd2?
This throws away all (Dragon1) or most (Stockfish17) of White's advantage. White had several strong moves, including 10.Ne5 and 10.Bb5+, but probably best is 10.Na4!?, when the engines continue 10...Qa5 11.Nc5 e6 12.c3!? Bxc5 13.dxc5 Nc6 14.b4 with what they reckon is a positionally won game.
10...e6
At last!
11.Rfe1?
This is asking too much of the position. The engines still like Na4, but with the black queen's knight protected, Black can reply 11...Qc6 with equality (Dragon1) or at least only a slight disadvantage (Stockfish17).
What should Black play?
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11...Nxc2
Also promising is 11...Ne4!?, but greed is good, at least on this occasion.
12.Nh4?
Better is 12.Bb5+ with complicated play, albeit favouring Black. The engines' main line runs 12...Kd8 13.Ne5 Bb4! (13...Rc7 also favours Black) 14.Nxf7+ Ke7 15.Nxh8 Bxc3 16.bxc3 Qxb5 17.Rab1 Qc6 (17...Qa6!? may be even stronger) 18.Be5 Rxh8, when Black is winning on material.
12...Nxd4??
Several moves win relatively comfortably, including 12...Nxe1 and 12...Qxb2.
13.Nxf5?
Winning is 13.Be3, eg 13...Nxe2+ 14.Rxe2 Qc6 15.Nxf5 exf5 16.Bd4+,  when 16...Kd8 17.Bxf6+ gxf6 18.Nxd5; 16...Be7 17.Bxf6+ Qxf6 18.Nxd5; and 16...Ne4 17.f3 are all deeply unpleasant for Black.
13...Nxf5 14.Nxd5?
A faulty combination, whereas after both 14.Rac1 and 14.Bb5+ White has a fair bit of compensation for two pawns, and practical chances.
14...Nxd5 15.Qxd5 exd5??
Black is a sound pawn up, and winning, according to the engines, after 15...Bc5 16.Qf3 (forced) 0-0.
16.Bb5+ 1-0
I do not think Haran will be able to call this his Immortal Game, but it would have had a pretty-looking final position if I had been sporting enough to allow it.
Dulwich won the match 5-3.
MY BATTERSEA SEASON 2024-5
DATE.....EVENT...........................COL..RATING..OPP'S RATING..SCORE..SEASON PERF
12/9/24..Central London League....W......1933..........1886................1............2286
26/9/24..Central London League....B.......1933..........2112................1............2399
15/10/24.Club Championship.........W......1968..........1578................1............2259*
31/10/24.Central London League...B.......1968..........1867................0...........2061*
19/11/24.London League...............W.......1957..........1991................1............2127*
21/11/24.Central London League...B.......1957..........2035................=............2112*
27/11/24.London League...............W.......1957..........1723................=............2056*
12/12/24.Central London League...B.......1965..........2153................0............2018*
7/1/25.....Club Championship.........B.......1958..........1785................1............2037*
9/1/25.....Central London League...B.......1958..........1851................0............1978
14/1/25....Eastman Cup.................B........1958..........2052................1............2021*
28/1/25....London League..............B........1958..........1766................1............2033*
4/2/25......London League..............B........1980..........1757................1............2043*
6/2/25......Central London League..W.......1980..........1932................0............2006*
11/2/25....Central London League..B........1986..........2178................=............2018*
13/2/25....Central London League.W........1986..........1998................1............2042*
27/2/25....Central London League..B........1986..........1996................0............2015*
13/3/25....Central London League..B........1984..........2286................0............2008*
17/3/25....London League..............W........1984..........1870................0............1980*
3/4/25......Central London League..W.......1985...........2127...............0............1967
8/4/25......London League..............W........1985..........1992................=............1968
9/4/25......London League...............B........1985..........2004................0............1952
22/4/25....Croydon League.............B....... 1985..........1735................0............1925
13/5/25....Croydon League.............W.......1960..........1844................1............1939
20/5/25....London League...............B........1960..........2011................0............1926
*My season's performance is slightly better than this as my win against a 1578 was a 1978 performance, lowering my average despite me winning.
I also scored a default win in a Croydon League match.

Sunday, 5 September 2021

Lessons From Northumbria V

FACED an English junior in round five of the Northumbria Challengers (U2000).
Spanton (1808 Fide/1998 ECF) - Edward Jackson (1435 Fide/1893 ECF)
Caro-Kann Exchange
1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3 Nc6 5.c3
As grandmaster Nigel Davies points out in his DVD on the Queen's Gambit Declined Exchange Variation for ChessBase, there are strong similarities between the Exchange Variation of the QGD and the Exchange Variation of the Caro-Kann, the main difference being the pawn-structure is reversed. In other words, in the former White has the possibility of a minority attack on the queenside while Black's counterplay often lies on the kingside, while in the latter Black has the possibility of a minority attack on the queenside while White's counterplay often lies on the kingside.
5...Nf6 6.Nf3
Bobby Fischer used to play 6.Bf4.
6...Bg4 7.Nbd2 e6 8.0-0 Be7
The more-active 8...Bd6 is much-more popular in ChessBase's 2021 Mega database, but the text has also been played by GMs.
9.Re1 0-0 10.Nf1 Bh5!?
An interesting manoeuvre by which Black avoids giving up the bishop-pair, as would be the case after, for example, 10...Qc7 11.Ng3 and 12.h3.
11.Ng3 Bg6 12.Bg5 a6 13.Bxg6 hxg6
How should White proceed?
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14.Ne5?!
The engines dislike this, preferring something like 14.h4!? or 14.Qe2. The problem with the text is it helps Black bring about exchanges that diminish the possibility of a white kingside attack.
14...Nxe5 15.dxe5 Nd7 16.Bxe7 Qxe7 17.Qd4 b5
The start of a thematic minority attack - the engines reckon Black is slightly better.
18.Rad1 Rfc8 19.f4?!
Defending an e pawn that probably did not need reinforcing, and at the same time weakening the white kingside. The engines suggest 19.Nf1 or 19.b3!?
19...Qc5?!
The engines much prefer 19...Rc4 or 19...a5. It seems they reckon an exchange of queens makes White's defence easier.
20.Ne2 a5 21.a3 Rab8 22.Rc1
Black is only slightly better after 22.Qxc5 Nxc5, according to the engines.
22...Qc4!? 23.Qe3
It is too late to exchange queens as 23.Qxc4? bxc4 leaves White chronically weak on the b file. The engines give the interesting 23.b4!?, with chances to hold as the apparently weak c pawn is relatively easy to defend.
23...Nc5 24.Nd4 Nb3 25.Nxb3 Qxb3 26.Qd2 Rc4 27.g3
White may be holding on after the engines' 27.Re3!, one point being 27...Rxf4 can be met by 28.c4 Qa2 29.cxd5 Qxd5 30.Qxd5 exd5 31.Rc5 with good drawing chances. However 27...Qa4 keeps a black advantage.
27...Rbc8 28.Re3 b4 29.axb4 axb4 30.Rd3 Ra8 31.Kg2
Possibly slightly better is 31.Qc2 Qa2 32.b3 Rc5 33.Qxa2 Rxa2 34.c4, but White still has the upper hand, according to the engines.
31...Ra2 32.cxb4??
32.Rc2 keeps the game going. After the text White faces catastrophic loss of material.
32...Rxb2 0-1