Showing posts with label Liberated Bishop. Show all posts
Showing posts with label Liberated Bishop. Show all posts

Thursday, 26 February 2026

League Chess

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

Terry Whitton (1863) - Spanton (1928)
Queen's Pawn Game
1.Nf3 d5 2.g3 Nc6!? 3.d4 Bf5 4.Bg2 Nf6 5.0-0 e6 6.b3!?
This is second-most popular in ChessBase's 2026 Mega database, scoring an excellent 70%, but Stockfish17.1 and Dragon1 prefer 6.c4 or 6.Nh4.
6...Nb4 7.Na3 Bd6 8.Bb2 0-0
Now castling has been completed, how would you assess the position?
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Both sides have developed comfortably, and there are no obvious weaknesses. White is more likely to get in a c-pawn break, but neither player is close to pushing the e pawn to the fourth rank, and the engines rate the game as equal.
9.c3 Nc6 10.Nc2 Re8 11.Ne3 Be4 12.c4 a5!? 13.Ne5!? Bxg2 14.Kxg2
Also equal is 14.Nxc6 bxc6 15.Kxg2, according to the engines.
14...Ne7 15.Nd3!?
The engines reckon this is an improvement on Saidakbar Saydaliev (2457) - Mayank Chakraborty (2448), Chess.com Blitz 2025, which saw 15.cxd5?!, when 15...exd5 would have given Black the upper hand, according to the engines.
15...Ng6 16.c5!? Bf8 17.Rc1 b6 18.Rh1 Nd7 19.h4 h5 20.Qd2
The engines prefer pushing the c pawn, or exchanging on b6.
20...bxc5 21.Nxc5 Nxc5 22.dxc5 c6 23.Rc2 Be7 24.Rhc1 Bf6 25.a3 Bxb2 26.Rxb2 Qf6
The engines much prefer 26...f5!?, or preparing the move with 26...Rf8.
27.b4 axb4 28.axb4 Reb8 29.Rcb1 Rb5 30.Rb3 e5 31.Qd3
Threatening 32.Nxd5!
31...e4 32.Qd2 Ne5 33.Qd4 g5!? 34.hxg5 Qxg5 35.f4!? exf3+ 36.exf3
How should Black proceed?
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36...Ng6
Interesting is 36...Nc4!? 37.Nxc4 dxc4, when 38.Qxc4?? Qd2+ and 39...Ra2 is catastrophic for White.
However, White should play 38.R3b2, when 38...Rd8 39.Qxc4 Qf6 seems to give Black enough for a pawn, but no more.
37.f4 Qe7??
Black had to play 37...Nh4+, meeting both 38.Kh3 and 38.Kf2 by 38...Nf5+, with equal chances.
White to play and win
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38.R3b2??
38.Nf5 threatens mate in one, and since 38...Qe2+? is easily met by 39.Kg1, and 38...Qf8?! can be strongly answered by 39.Re3, Black has to play 38...Qe4+ 39.Qxe4 dxe4, but 40.Nd4 wins the c6 pawn and leaves White with connected farside passers.
38...Ra3??
Necessary is 38...Qe6.
39.R2b3??
Nf5 still wins.
39...Ra2+ 40.R3b2 Ra3?? ½–½
The match finished 4-4.
My Battersea Season 2025-6
Date       Event  Colour  Rating  Opp's Rating  Score  Season's Perf
16/9/25   CLL       W       1936         1952             0           1552
18/9/25   CLL       W       1936         1797             =           1675
16/10/25 CLL       W       1889         2047             0           1665
23/10/25 CLL       B        1889         1823             1           1805
18/11/25  LL         W       1891         1980             =           1840
20/11/25  CLL      W       1891         1866             1            1911
25/11/25  BCC     B        1891         1817             1            1955
9/12/25    LL         W       1904         1982             1            2008
16/12/25  LL         B        1904         2046             0            1968
18/12/25  CLL      B        1904         2066             1            2018
6/1/26      CLL      W       1929         2150             =            2066
7/1/26      LL         W       1929         1971             =            2058
8/1/26      CLL      B        1929         1800?           =            2038
13/1/26    LL         B        1929         2035             1            2067
27/1/26    LL         B        1929         2089             0            2041
29/1/26    CLL      B        1929         1882             =            2031
3/2/26      BCC     W       1928         1836             1            2043     
12/2/26    CDL      B        1928        1890              1            2057
25/2/26    LL         B        1928        1863              =            2047
CLL: Central London League
LL: London League
BCC: Battersea club championship
CDL: Croydon & District League
I also have a win-by-default in the Central London League

Friday, 15 November 2024

Cap Negret Round Nine

Spanton (2009) - Cesar Camisón Zornoza (1895)
1.Nc3/Liberated Bishop
1.Nc3 d5 2.d4 Bf5!?
A Liberated Bishop approach has much more going for it when White cannot react with queenside pressure by playing c4, Nc3 and Qb3. The text scores an excellent 52% in ChessBase's 2024 Mega database.
3.f3!? e6
The mainline in Mega24 runs 3...Nf6 4.Bg5 Nbd7 5.Nxd5!? Nxd5 6.e4 h6!? 7.Bh4 Ne3?! 8.Qd3 Nxf1 9.exf5 Nxh2?! 10.Rxh2, with the upper hand for White, according to Stcokfish17 and Dragon1, but they are unimpressed with many of the moves in this sequence.
4.e4 dxe4 5.fxe4 Bg6
Not 5...Qh4+?? 6.g3 etc.
6.Nf3 Bb4 7.Bd3 Nc6
This is the main continuation in Mega24. The engines fluctuate between the text, 7...Ne7, 7...Nd7, 7...c5 and 7...Nf6.
8.a3 Bxc3+
The engines prefer 8...Ba5.
9.bxc3 Nge7
The pawn-formation somewhat resembles a French Winawer, and with the black light-square bishop outside of the pawn-chain, but Black has no pawn-pressure on the white centre
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10.0-0 a6?!
This seems to be a novelty, and probably not a good one. The known move is castling.
11.a4 Qd7 12.Ba3 f6!?
The engines are OK with this, albeit they reckon White is positionally winning.
13.Qe2 Bf7 14.Rab1 Nd8 15.Ra1
The engines suggest getting on with it on the kingside with e5, Nh4 or Qf2.
15...0-0 16.c4 Re8 17.c3
Stronger is 17.e5 f5 and now 18.c3, according to the engines.
17...Ng6 18.g3 Qxa4?!
The engines reckon a better way to grab the pawn is 18...e5 19.d5 Qxa4.
19.e5 Qd7
Possibly slightly better is 19...f5, but 20.h4 is good.
20.exf6 gxf6 21.Nd2 f5 22.Nf3 Nc6 23.Ng5 Rad8!?
Not just developing, but also setting up a possible sacrifice on d4.
24.Qh5 Nf8 25.Qh6 Bg6 26.Rae1
How should Black proceed?
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26...Ne7
Dragon1 agrees with this, but Stockfish17 prefers 26...Nxd4!?, continuing 17.Bxf8!? Rxf8 18.Re3, when Black is two pawns up, but both engines reckon White is winning.
27.d5!?
Trying to open kingside lines with 27.g4!? may be better.
27...exd5 28.cxd5?
The engines reckon 28.h4 gives a large advantage.
28...Qxd5?
The wrong capture. Instead 28...Nxd5 29.Bc4 c6 equalises (Dragon1) or leaves White with only a slight edge (Stockfish17).
How should White proceed?
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29.Rd1?
White has a winning advantage after the engines' 29.Nxh7! (29.Rxe7!? probably transposes) Bxh7 30.Rxe7 Rxe7 31.Bxe7 Qxd3 32.Qg5+ Bg6 33.Bxd8, when Black has a pawn for the exchange, but the black king is much weaker.
29...Qb3
Best may be 29...c5!?, although the engines reckon White has at least full compensation for being two pawns down.
30.Bxe7 Rxe7 31.Bc4+ Qxc4 32.Rxd8 Qc5+ 33.Kg2
Possibly better is 33.Rf2!? Re1+ 34.Kg2.
33...Qc6+?
The engines reckon White is at best only slightly better after 33...Re2+ 34.Kh3 Qe7.
34.Kh3?
White has a won game after 34.Nf3, according to the engines.
34...Qf6?!
Almost certainly better is 34...Re8.
What should White play?
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35.Nxh7??
Both 35.Nf3 and 35.Rb8 give the upper hand, according to the engines.
35...Rxh7 0-1

Wednesday, 6 March 2024

Championship Chess

PLAYED last night.

Spanton (1910) - Jason Robinson (1990)
Jobava-Prié
1.Nc3 d5 2.d4 Bf5!?
This Liberated Bishop-approach to White's d4/Nc3 setup has been tried by Magnus Carlsen, and scores 52% in ChessBase's 2024 Mega database.
3.Bf4
The mainline in Mega24 runs 3.f3 Nf6 4.Bg5 Nbd7 5.Nxd5!? Nxd5 6.e4 h6!? 7.Bh4 Ne3?! (Stockfish16 and Komodo14.1 strongly dislike this, preferring, among other moves, 7...N7f6!?) 8.Qd3 Nxf1 9.exf5 Nxh2 10.Rxh2, after which material is level but White's large lead in development gives the upper hand, according to the engines.
3...c6 4.e3 Nf6 5.Bd3 Bxd3
This is most popular in Mega24, but the engines prefer 5...e6!?
6.cxd3!? e6 7.Nf3 Qb6 8.Qe2 Nbd7 9.h3
Not so much to control the g4 square as to give White's bishop a bolthole at h2.
9...Be7 10.0-0 0-0
Now both sides have castled, how would you assess the position?
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White has an extra pawn on the two central files, and the more-active minors, but the white pawn-structure is less flexible, and Black's queen exerts pressure. The engines reckon White has an edge.
11.e4 dxe4
This may be a novelty. Roven Vogel (2463) - Nikita Matinian (2435), Chess.com Blitz 2022, saw 11...Qa6!? 12.Qd2!? Rfd8!? 13.Bg5?! dxe4 14.dxe4 c5 with equality, according to the engines (but 0-1, 38 moves).
12.dxe4 Rfe8 13.Rfe1 Rac8 14.Rad1 Nf8 15.Bh2 Ng6 16.Ng5!?
Hoping to provoke a weakness.
How should Black respond?
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16...Qa5!?
This active defence is Komodo14.1's top choice, at least for a while (it later prefers 16...c5); Stockfish16 suggests 16...Red8. The 'obvious' 16...h6 is also fine, according to Stockfish16, but Komodo14.1 reckons it gives White a slight edge.
17.e5!?
White gains space and the e4 square, but Black gets the d5 square, and White's bishop becomes bad.
17...Nd5 18.Nce4
The engines prefer 18.Nge4.
What should Black play?
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18...Bxg5!?
This becomes Komodo14.1's top choice, at least for a while, and is Stockfish16's second choice. But both engines reckon Black can grab a pawn, one line running 18...Qxa2!? 19.Nc5!? (threatening to trap the black queen) 19...Bxc5 20.dxc5 Qb3 21.Ne4 Ra8 22.Nd6 Rf8, when Komodo14.1 gives White full compensation for a pawn, but Stockfish16 has Black slightly better.
19.Nxg5 Rf8?
Trying to be solid, but this is a mistake. Again the engines reckon Black can grab the a2 pawn.
20.Qh5 h6 21.Nxe6!
Black to play and limit the damage
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21...Rfe8?
The lesser evil is 21...fxe6 22.Qxg6 Rce8. Also probably better is the engines' sharp 21...Nf6!?, eg 22.Qf5 Ne7 23.Qc2 fxe6 24.exf6 Rxf6.
22.Nc5 b6?!
Almost certainly better is 22...Qxa2.
23.Nb7 Qxa2 24.Nd6 Qxb2 25.Nxc8
Even stronger may be 25.Qf5!?
25...Rxc8 26.e6 Nf6 27.Qf5!? Kh7 28.exf7 Rf8 29.Re7 Qb3 30.Rde1 Rxf7 31.Rxf7 Qxf7 32.Re6 Kh8
32...Kg8 may be a little better, but is still losing.
33.Rxc6 Ne7 34.Rc7 Nxf5!?
Getting the queens off safeguards Black's king, but the ending is pretty much hopeless, so perhaps 34...Qa2 gives better practical chances.
35.Rxf7 Nxd4 36.Rxa7 Nd5 37.Be5 Nc6?!
Black is lost anyway, but this does not help.
38.Bxg7+ Kg8 39.Rd7 Nde7 40.Bxh6 Kf7 41.Bg5 Ke6 42.Rxe7+ Nxe7 43.Bxe7 Kxe7
The game finished:
44.Kf1 Kd6 45.Ke1 Kc5 46.Kd2 Kb4 47.Kc2 Ka3 48.Kb1 1-0

MY BATTERSEA SEASON 2023-4
DATE.....EVENT...........................COL..RATING..OPP'S RATING..SCORE..SEASON PERF
24/10/23 London League               B      1870         2102                   =            2102
26/10/23 Central London League  W     1870         2118                    =            2110
21/11/23 Eastman Cup                  W     1882         2118                    =            2113
14/12/23 Central London League  B      1882         2152                    0            2023
10/1/24   London League               B      1884         2130                    0           1964
11/1/24   Central London League   B      1884        2278                    1            2083
25/1/24   Central London League  W      1884        2205                    =            2100
30/1/24   Club Championship         B      1884        1809                    1            2114
1/2/24     Central London League  W      1916        2072                    0            2065
7/2/24     London League               B       1916        2298                    0            2048
8/2/24     Central London League  B       1916        1960                    0            2004
15/2/24   Central London League  B       1916        1951                    =            1999
29/2/24   Central London League  B       1916        2014                    0            1970
5/3/24     Club Championship        W      1910        1990                    1            2000

Monday, 1 January 2024

Kraków Seniors Round Five

FACED a Ukrainian international master.

Vladimir Chubar (1805) - Spanton (1743)
Liberated Bishop/London System
1.d4 d5 2.Nf3 Bf5 3.Bf4 e6 4.e3 Bd6 5.Bd3!?
This is Komodo14.1's top choice, at least for a while. Stockfish16 prefers 5.Bg3 or 5.Bxd6.
5...Bxf4 6.exf4 Qd6 7.Qxd2!?
The engines prefer 7.Bxf5 exf5, and either 8.0-0 or 8.Nc3.
7...Bxd3 8.Qxd3?!
The engines reckon 8.cxd3!? is necessary, after which Stockfish16 gives Black the upper hand, or at least a slight edge, but Komodo14.1 gives Black at best a slight pull.
How should Black proceed?
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8...Nc6
Almost certainly not 8...Qb4+?! 9.Nc3 Qxb2?! 10.0-0, but the pawn-grab 8...Qxf4! is strong as Black threatens ...Qc1+, so White cannot play 9.Qb5+ Nd7 10.Qxb7?? as 10...Rb8 11.Qxa7 Qc1+ 12.Ke2 Qxh1 wins for Black.
9.g3 Nf6 10.Nbd2 0-0 11.c3 Ne7 12.0-0 c5 13.Ne5 c4!?
Pushing on like this is often frowned upon, but here White does not have the counterthrust e4.
14.Qc2 b5 15.a3 a5 16.Ndf3 Ne4 17.Ng5!? Nxg5
The engines reckon Black has at least the better side of equality after 17...Nf6, and they also prefer 17...f6 18.Nxe4 dxe4 19.Ng4 f5.
18.fxg5 f6 19.gxf6 Rxf6?!
Probably better is 19...gxf6 20.Ng4 e5.
The backward e pawn proves a permanent weakness
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20.Rfe1 Raf8 21.Re2 Nc6 22.Rae1 Re8?!
Passive. Perhaps better is seeking counterplay with 22...Rh6.
23.f4 Ne7
If 23...b4?!, White has 24.Qa4, when the vulnerability of the e8 rook restricts Black's options.
24.Kg2 Qc7?
Better is 24...Ref8.
What should White play?
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25.Nf3
Even stronger is the engines' 25.Ng4 Rg6 26.Rxe6!, the point being 26...Rxg4 can be met by 27.Qe2.
25...Qd7 26.Ng5
How should Black meet the twin threats of Qxh7+ and Nxe6?
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26...g6?
Correct is 26...Nf5. I rejected it because of 27.g4 Nh4+ 28.Kg3 Ng6 29.f5??, missing the strength of 29...Qd6+. Better is 28.Kh1 g6 29.Qd1 with a slight edge for White, according to the engines.
27.Nxe6 Nf5 28.Nc5 Rxe2+ 29.Qxe2 Qf7 30.Qe5
White's advantage is worth more than a minor piece, according to the engines.
30...Nd6
Marginally better, but still losing, according to the engines, is 30...h6.
The game finished:
31.Nd7 Qxd7 32.Qxf6 Ne4 33.Qe5 Qb7 34.Re2 1-0

Saturday, 29 January 2022

A System Against The Liberated Bishop

MANY players like to start a game with 1.d4 followed by 2.Nf3, sometimes reversing the move-order but reaching the same positions.
There was a time when such games would see Black respond with 1...d5 and 2...Nf6, or the other way  around.
That is still common today, but increasingly blacks are trying other responses, including the so-called Liberated Bishop, ie 1...d5 and 2...Bf5.
I write "so-called" because the name was coined for grandmaster Alexey Bezgodov's 2014 New In Chess book The Liberated Bishop Defence.
I have a friend who bought the book and is keen on the analysis presented in it, although he has come to only play the system against d4 and Nf3 rather than against 1.d4 d5 2.c4.
My round-five game at Mariánské Lázně saw me employ a simple-to-learn but, I believe, effective set-up against the Liberated Bishop.
The full game can be seen at ML 5 but here I will concentrate on the opening.

1.Nf3 d5 2.d4 Bf5
This position goes back to 1854 in ChessBase's 2022 Mega database. White's most-popular response is 3.c4 e6 4.Nc3, while also popular is 4.Qb3. Both white fourth-moves can be met by the sharp 4...Nc6!?, and you can expect a Liberated Bishop player to be well-prepared for these lines.
3.e3!?
This takes the game into the realm of the Colle, and was the usual reply in the early days of 2...Bf5.
3...Nf6
The game has transposed to a main line of the Colle, normally reached via the move-order 1.d4 d5 2.Nf3 Nf6 3.e3 Bf5. Magus Carlsen, Garry Kasparov and Levon Aronian are three strong players who have tried this system as Black, with Aronian having won from this position with both black and white.
4.Bd3!?
The second-most popular move in the position, behind 4.c4. The idea is simply to challenge Black's active bishop.
How should Black respond?
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4...Bxd3
This is by far the commonest response in Mega22, but other moves have been tried by strong players.
Second-most popular is 4...Bg6, when Edgard Colle - Savielly Tartakower, Bled (Yugoslavia) 1931, continued 5.Ne5 e6 6.Nxg6!? hxg6 7.Nd2 c5 8.c3 Nc6 9.Qe2 Qc7 with a slight edge for Black, according to Stockfish14.1 and Komodo12.1.1 (0-1, 43 moves).
Winning the bishop-pair but half-opening the h file is a controversial procedure, especially when the white king is likely to end up on the kingside (as happened in the game). However the position was arguably handled rather better by White in Priyadharshan Kannappan* (2525) - Jayaram Ashwin* (2468), St Louis SPICE Cup 2016, when White played to open lines for his bishops, viz 7.c4 Bb4+ 8.Nc3 c5 9.dxc5 Qc7 10.cxd5 Nxd5 11.Bd2 Nxc3 12.Bxc3 (12.Qb3!?) Bxc3+ 13.bxc3 Qxc5 14.Rb1!? Qxc3+ 15.Qd2 Qc7 (after 15...Qxd2+ 16.Kxd2 Black cannot prevent Rxb7) 16.Qb2 Nc6 17.Qxb7 with maybe a slight edge for White (1-0, 47 moves).
Another reasonably popular choice is 4...e6!?, when Alexander Alekhine - Boris Kostić, Bled (Yugoslavia) 1931, continued 5.Bxf5 exf5 6.Qd3 Qc8 7.0-0 Bd6 8.b3 0-0 9.c4 c6 10.Nc3 (10.Ba3!?) b6 11.cxd5 Nxd5 12.Nxd5 cxd5 13.Bb2 g6 14.Rfc1 Qa6 15.Qc3 Rd8 16.Ne5 Nd7 with an equal game, according to the engines (but 1-0, 47 moves).
5.cxd3!?
More popular is playing for development with 5.Qxd3, but playing for the centre with the text is an interesting alternative.
5...c6
Commoner, but scoring eight percentage points fewer in Mega22, is 5...e6, when the engines like 6.Qc2!?, delaying ...c5.
6.Nc3 e6 7.0-0
The thematic Colle move e4 is already good for White, according to the engines, which give White an advantage, especially after the most-popular response 7...dxe4.
7...Be7
The active-looking 7...Bd6?! is suspect because it sets up a white pawn-fork at e5.
8.Qe2
Again the engines prefer e4.
8...0-0
Here I played 9.Rd1!?, which is not bad, but almost certainly better is 9.e4, when White has an edge, albeit a small one. Tibor Dencsi (2338) - Balázs Csonka (2287), Hungarian Team Championship 2012, continued 9...Na6 10.Be3 Rc8 11.Rac1 Qa5 12.a3, when White is better, according to the engines (1-0, 47 moves).
*The grandmaster's name also appears as Kannappan Priyadharshan while his opponent also appears as Ashwin Jayaram.

CONCLUSION: playing to swop off Black's active light-square bishop is a valid plan against the Liberated Bishop, although Black should be fine with accurate play.

Thursday, 6 August 2020

Champion Repertoire (part 14)

VLADIMIR Kramnik was world champion from when he beat Garry Kasparov in 2000 until he lost the title in a tournament(!) to Vishy Anand in 2007.
A repertoire based on his games emphasises positional play.
White
Open 1.d4, planning to avoid the Nimzo-Indian by 1...Nf6 2.c4 e6 3.Nf3.
Against the Queen's Gambit Declined: 3...d5 play 4.Nc3, meeting 4...Be7 with 5.Bf4 0-0 6.e3 and continuing against the main move 6...c5 with 7.dxc5 Bxc5 8.a3.
If White switches to the Semi-Slav with 4...c6 play 5.Bg5, meeting 5...h6 with 6.Bxf6 Qxf6 7.e3,  meeting 5...dxc4 with 6.e4 b5 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.g3!? and meeting 5...Nbd7 with 6.e3, which allows the Cambridge Springs: 6...Qa5 - reply to this with 7.cxd5 Nxd5 (the only move Kramnik's opponents played in ChessBase's 2020 Mega database) 8.Qd2.
Against the Ragozin: 4...Bb4 play 5.Bg5 (Kramnik with this move scored 91%!), meeting 5...h6 with 6.Bxf6 Qxf6 7.Qb3!? If 5...Nbd7 play 6.cxd5 exd5 7.Qc2.
Against 4...dxc4 play 5.e4 Bb4 6.Bg5 c5 7.Bxc4 cxd4 8.Nxd4.
Against the Semi-Tarrasch: 4...c5 play 5.cxd5 Nxd5 (none of Kramnik's opponents tried 5...exd5) 6.e4 Nxc3 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 0-0 11.Rd1!? If 5...cxd4 play 6.Qxd4 exd5 (meet 6...Nxd5 with 7.e4 Nxc3 8.Qxc3) 7.e4!
Against the Queen's Indian: 3...b6 play 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 c6 8.Bc3 d5 9.Ne5 Nfd7 10.Nxd7 Nxd7 11.Nd2 0-0 12.0-0. If 4...Bb7 play 5.Bg2 Be7 6.0-0 0-0 7.Re1!?
Against the Bogo-Indian: 3...Bb4+ Kramnik scored 90% (four wins and a draw) with 4.Bd2 and 100% (four wins) with 4.Nbd2, so it is very difficult to give a repertoire recommendation, but the latter move has the advantage of being a lot less popular.
Against 3...c5 play 4.d5 cxd5 5.exd5 d6 6.Nc3 g6 7.Nd2!? Bg7 8.e4 0-0 9.Be2.
Against the Grünfeld: 2...g6 3.Nc3 d5 play 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.Rb1 0-0 9.Be2.
Against the King's Indian: 3...Bg7 4.e4 d6 play 5.Nf3 0-0 6.Be2 e5 7.0-0 Nc6 8.d5 Ne7 9.b4, meeting the mainline 9...Nh5 10.Re1 f5 11.Ng5 Nf6 12.Bf3 c6 with 13.Be3.
Against the mainline Benoni: 2...c5 3.d5 e6 play 4.Nc3 exd5 5.cxd5 6.Nf3 g6 7.Nd2!?, transposing to the line given against 1.d4 Nf6 2.c4 e6 3.Nf3 c5. Against the Czech Benoni: 3...e5 play 4.Nc3 d6 5.e4. Against the Benko Gambit: 3...b5 play 4.cxb5 a6 5.e3.
Against 1...d5 play 2.Nf3. After 2...Nf6 3.c4 transpositions to lines already covered are likely, but meet the Slav: 3...c6 4.Nc3 dxc4 with 5.a4 Bf5 6.Ne5. Against 4...a6 Kramnik equally played 5.e3 and 5.a4, but did better percentage-wise and rating-wise with the latter. Against the main reply 5...e6 he scored much better percentage-wise and rating-wise with 6.g3 rather than with 6.Bg5.
Against a delayed Queen's Gambit Accepted: 1...d5 2.Nf3 Nf6 3.c4 dxc4 play 4.e3, meeting 4...e6 with 5.Bxc4 c5 6.0-0 a6 7.Bb3!?, meeting 4...Bg4 with 5.Bxc4 e6 6.Qb3!? and meeting 4...g6 (the only other move he has faced) with 5.Bxc4 Bg7 6.0-0 0-0 7.Nc3.
Against 2...e6 play 3.c4 with a likely transposition to a line already covered.
Against the Liberated Bishop: 2...Bf5 play 3.c4 e6 4.Nc3, meeting 4...c6 with 5.Qb3 Qb6 6.c5, meeting 4...Nf6 with 5.Bg5 and meeting 4...Nc6 with either 5.Bf4 or 5.cxd5 exd5 6.Bf4.
Against 2...c5 play 3.c4, meeting 3...e6 with 4.cxd5 exd5 5.Nc3 and meeting 3...cxd4 with 4.cxd5 Nf6 5.Qxd4 Qxd5 6.Nc3 Qxd4 7.Nxd4.
Against 1...e6 Kramnik often transposed to a French Defence: 2.e4 d5 3.Nc3 but he also played 2.c4, which is an easier repertoire fit. If Black then played a delayed Dutch: 2...f5 Kramnik once played 3.g3 Nf6 4.Bg2 and once played 3.Nc3 Nf6 4.e3.
Against an immediate Dutch: 1...f5 Kramnik usually went for a kingside fianchetto, eg 2.Nf3 Nf6 3.c4 g6 (he did not face 3...e6) 4.g3.
Against 1...d6 he did best with 2.Nf3, with likely transpositions to lines already covered, and against the independent 2...Bg4 he played 3.c4.
Against 1...g6 he did best with 2.c4, meeting 2...Bg7 with 3.e4 (or 3.Nc3 and 4.e4).
Black v 1.e4
Play 1...e5 intending to meet the Spanish: 2.Nf3 Nc6 3.Bb5 with the Berlin: 3...Nf6, the main line being the Berlin Wall: 4.0-0 Nxe4 5.d4 Nd6 6.Bxc6 dxc6 7.dxe5 Nf5 8.Qxd8+ Kxd8. After 9.Nc3 Kramnik played 9...Bd7 and 9...Ke8 almost equally often but scored better percentage-wise and rating-wise with the latter. He usually met the standard 10.h3 with 10...h5.
Against 5.Re1 Nd6 6.Nxe5 Be7 7.Bf1 (the only move Kramnik faced) he usually replied 7...Nxe5 8.Rxe5 0-0, usually meeting 9.d4 with 9...Bf6 10.Re1 Re8 and usually meeting 9.Nc3 with 9...Ne8 10.Nd5 Bd6 11.Rel c6 12.Ne3 Be7 13.Nf5 d5 14.Ne7+ Kh8 15.Nxc8 Rxc8 16.d3 f5.
Against 4.d3 he usually played 4...Bc5, meeting 5.c3 with 5...0-0, usually meeting 5.0-0 with 5...d6 (but scoring much better when he played 5...Nd4) and meeting 5.Bxc6 with 5...dxc6, usually replying to 6.Nbd2 with 6...Be6.
Against a transposition to the Spanish Four Knights: 4.Nc3 he played the Rubinstein Variation: 4...Nd4. and he met 4.Qe2 with 4...Bc5.
Against the Scotch Four Knights: 3.Nc3 Nf6 4.d4 exd4 5.Nxd4 he played 5...Bb4, and against the Scotch: 3.d4 exd4 4.Nxd4 he mostly played 4...Nf6 but scored much better percentage-wise and rating-wise with 4...Bc5. He twice faced the Scotch Gambit: 4.Bc4, both times replying 4...Bc5.
Against the Italian Game: 3.Bc4 he played 3...Bc5, usually meeting 4.c3 Nf6 5.d3 with 5...d6 6.0-0 a6. Against 5.d4 exd4 6.e5 d5 7.Bb5 Ne4 8.cxd4 he played 8...Bb6, and against 6.cxd4 Bb4+ 7.Bd2 (no games with 7.Nc3) he played 7...Nxe4!? 8.Bxb4 Nxb4 9.Bxf7+ Kxf7 10.Qb3+ Kf8!? 11.Qxb4+ Qe7.
There is only one game with the Evans Gambit: 4.b4, Kramnik replying 4...Bxb4 5.c3 Be7.
Against the Bishop's Opening: 2.Bc4 Kramnik played 2...Nf6.
Against the Vienna: 2.Nc3 Nf6 3.g3 he did slightly better with 3...d5 than with 3...Bc5. Against 3.f4 he played 3...d5 4.fxe5 Ne4 5.Nf3 Bc5!?
There are no games in Mega20 in which he faced the King's Gambit.
Black v 1.d4 and Others
Aim against 1.d4 for a Nimzo-Indian: 1...Nf6 2.c4 e6 3.Nc3 Bb4, meeting 4.Qc2 with 4...0-0 5.a3 Bxc3+ 6.Qxc3, at which point Kramnik played 6...b6 slightly more often than 6...d5, but did slightly better with the latter.
Against 4.e3 play 4...0-0, meeting 5.Bd3 with 5...c5 6.Nf3 d5 (Kramnik sometimes reversed Black's fifth and sixth moves) 7.0-0 Nc6 8.a3 Bxc3 9.bxc3 Qc7 and meeting 5.Ne2 with 5...d5 6.a3 Be7 7.cxd5 Nxd5!? (he played this uncommon move twice against one appearance for 7...exd5).
Against 4.Nf3 play 4...d5!?, meeting the most popular reply in Mega20 5.Bg5 with 5...Nbd7 6.cxd5 exd5 and meeting 5.cxd5 (the most popular reply of Kramnik's opponents) with 5...exd5 6.Bg5 Nbd7, which reaches the same position. Most games in Mega20 then continue 7.e3, which Kramnik met with 7...c5.
Against 4.f3 play 4...d5 5.a3 Bxc3+ 6.bxc3 c5 7.cxd5 Nxd5.
He only once faced 4.a3, replying with the mainline 4...Bxc3+ 5.bxc3 c5 6.e3 0-0 7.Bd3 Bc6 8.Ne2 b6 9.e4 Ne8.
Kramnik also only once faced 4.Bg5, replying 4...c5 5.d5 d6 6.e3 exd5 7.cxd5 Nbd7.
Against 3.Nf3 Kramnik usually switched to a Queen's Gambit Declined: 3...d5 and after 4.Nc3 made it a Semi-Slav: 4...c6.
Against 5.e3 Kramnik played 5...Nbd7, meeting 6.Bd3 with 6...dxc4 7.Bxc4 b5 8.Bd3 Bb7. He usually met 6.Qc2 with 6...Bd6, usually following up 7.Be2 0-0 8.0-0 with 8...Re8, usually following up 7.Bd3 with 7...0-0 8.0-0 dxc4 9.Bxc4, at which point he did best with 9...b5, and following up 7.b3 with 7...0-0, at which point he twice met the main move 8.Be2 with 8...b6 and once with 8...e5, and he once met 8.Bb2 with 8...e5 and once with 8...Qe7.
Against 5.Bg5 Kramnik usually played 5...h6 6.Bxf6 Qxf6 7.e3 Nd7 8.Bd3 dxc4 9.Bxc4 g6 10.0-0 Bg7, but almost as often and with similar results played the unusual 8...Qd8!? 9.0-0 Be7. If 6.Bh4 Kramnik liked to play 6...dxc4 7.e4 g5 8.Bg3 b5 9.Be2 Bb7.
Against 5.cxd5 he played 5...exd5 and against 5.g3 Nbd7 6.Bg2 he played 6...dxc4.
Against the Catalan: 4.g3 Kramnik varied his responses but did marginally best with 4...dxc4, at which point he only faced 5.Bg2. Here his favourite lines, with which he got almost identical results, were 5...Nc6 6.Qa4 Bb4+ and 5...Bb4+ 6.Bd2 a5.
Against 2.Nf3 he usually play 2...d5, with obvious transpositional possibilities to the QGD, and against the London System: 3.Bf4 he usually went for quick queenside play with ...Qb6 after either 3...c6 or 3...c5. Against the New London: 2.Bf4 he twice played 2...c5 and once played 2...g6.
Against the Trompwosky 2.Bg5 Kramnik did best with 2...d5, meeting 3.Bxf6 with 3...exf6 and meeting 3.e3 with 3...c6 or 3...c5.
Against the Veresov: 2.Nc3 d5 3.Bg5 he played 3...c6.
Kramnik's most common response to the English: 1.c4 was 1...e6, usually meeting 2.Nc3, 2.g3, 2.Nf3 and 2.d4 with 2...d5.
Against 1.Nf3 he usually played 1...d5, meeting the Réti: 2.c4 with 2...d5 (transposing to the English move-order 1.c4 e6 2.Nf3 d5) and usually meeting the King's Indian Attack: 2.g3 Nf6 3.Bg2 with 3...c6 and following up both 4.0-0 and 4.d3 with 4...Bg4.
Against 1.b3 he most often played 1...d5 2.Bb2 Nf6.
Kramnik twice faced the Bird: 1.f4, both times replying 1...d5.

Here, because I thought it might be of special interest to club players, is Kramnik taking on a very strong opponent's Liberated Bishop.
Kramnik (2790) - Boris Gelfand (2675)
Hoogovens (Wijk aan Zee) 1998
1.Nf3 d5 2.d4 Bf5
A more-in-keeping-with-the-repertoire way of reaching this position would be by reversing White's opening two moves.
3.c4 e6 4.Nc3 c6 5.Qb3
Playing on the queenside is the standard response when Black develops his light-square bishop early in a Queen's Gambit.
5...Qb6
5...Qc7 6.Bf4!? may have come as quite a shock (to spectators at least) in the 1995 Bundesliga game Kramnik (2715) - Gerald Hertneck (2595). After 6...dxc4 7.Bxc7 cxb3 8.e4 Bg6 9.a3!? the position was unclear (but 1-0, 33 moves).
6.c5 Qc7
White gets pleasant queenside pressure after 6...Qxb3 7.axb3.
7.Bf4 Qc8
Note that 6...Qc8? in the Hertneck game would have been a mistake because there is no decent answer to 7.cxd5, eg 7...exd5 8.e4! dxe4 9.Ng5 Nh6 10.Bc4 Bg6 11.Ncxe4 with a big attack, or 7...cxd5 8.Nb5 Na6 9.Rc1.
8.Nh4 Bg6 9.Nxg6 hxg6
The half-open h file is not much compensation for Black's otherwise restricted position.
10.e4 Nf6
Later games saw 10...dxe4 but White has good options after 11.Nxe4 Nf6.
11.exd5!? Nxd5 12.Nxd5 cxd5 13.Bb5+!?
Possibly improving over two previous high-level games that saw 13.Bxb8 Qxb8 14.Bb5+, when the black king did not prove overly inconvenienced at being obliged to shuffle sideways to d8 (although White did win both those games).
13...Nc6 14.0-0-0!?
The white king's position looks a little airy but Black will have trouble getting at it, and meanwhile Black has to find somewhere safe for his king.
14...Be7 15.h4 Kf8!?
My main analysis engines like this move - it is Stockfish11's top choice - but White must be better.
16.Kb1 a6 17.Ba4 Na5 18.Qf3 b6
Robert Hübner in Mega20 suggests 17...Kg8.
19.cxb6 Qb7 20.Rc1?!
Stockfish11 wants to be materialistic with 20.Bc1 while Komodo11.01 and Hübner want to go for it on the kingside with 20.h5 g5 21.h6! But given long enough the engines reverse their judgments - Komodo11.01 becomes materialistic and Stockfish11 wants to be gung ho.
20...Qxb6 21.Rc7?
The engines reckon White is still better after a move such as 21.Be5 or 21.h5.
21...Rb8?
Black is at least equal after 21...Bf6 or 21...Bd8, according to the engines.
22.Qc3 Nc4?
This looks aggressive but there is a complete answer. The engines give 22...g5 23.Be5 f6 24.Bg3 with a small edge for White.
White to play and win
*****
*****
*****
*****
*****
23.Rc6 Qxb2+
Best, but losing.
24.Qxb2 Rxb2+ 25.Ka1 Kg8
White threatened the devastating 26.Rc8+ (and 25...Rc8?? fails to 26.Bxb8).
26.Rxc4 Rxf2 27.Rc8+ Kh7 28.Rxh8+ Kxh8 29.g3
White has a bishop for two pawns. The game finished:
29...Ba3 30.Rd1 Kg8 31.Rd3 Be7 32.Bc7 g5 33.hxg5 Bxg5 34.Kb1 Be7 35.Bc2 g5 36.a4 f5 37.a5 Bf6 38.Bb6 f4 39.gxf4 gxf4 40.Rd1 1-0

Sunday, 11 March 2018

Good Wörishofen (part nine)

Spanton (1901) - Mario Bossoni (1907), Bad Woerishofen B (U2000)
The Liberated Bishop Defence has become popular over the last four years, at least at club level, thanks to a New in Chess book of the same name by Russian grandmaster Alexey Bezgodov.
The book was generally positively reviewed, eg American coach Jeremy Silman declared that it "fills a void in chess literature and can be strongly recommended."
The basic idea of the defence is that after 1.d4 d5, Black meets both 2.c4 and 2.Nf3 with 2...Bf5. The former, at least, used to be known as the Baltic Defence.
This is supposedly because it was a favourite with Paul Keres and other Baltic States players. In fact, if you consult ChessBase's 2018 Mega database, you will not find a single example of Keres playing 2...Bf5 after 1.d4 d5 2.c4 (but there are five examples of him playing 2...Bf5 after 1.d4 d5 2.Nf3).
This is not very surprising as Keres, along with many of his contemporaries, overwhelmingly preferred 1...Nf6 to 1...d5.
Silman has some interesting words on move orders in his review: "Most of the grandmaster games with 2...Bf5 come from the sequence 1.Nf3 d5 2.d4 Bf5. The more direct 1.d4 d5 2.c4 Bf5 is not seen as often. What keeps more players trying 1.d4 d5 2.c4 Bf5 is 3.cxd5. After 3...Bxb1 4.Qa4+ Qd7 5.Qxd7+ Nxd7 6.Rxb1, or 4...c6 5.dxc6 Nxc6 6.Rxb1 Qxd4 7.Qxd4 Nxd4, the queens come off the board and the first player has the potential advantage of the two bishops."
It was by Silman's 'approved' move order that I faced the Liberated Bishop for the first time in round eight at Bad Wörishofen.
1.Nf3 d5 2.d4 Bf5 3.c4 e6 4.Nc3 c6?!
Easily the most popular move in this position, played by the likes of Shirov, Short and Morozevich. However, strong players have also chosen 4...Nc6, 4...Nf6 and 4...Bb4.
My punctuation of Black's fourth move may seem provocative - impertinent, even - but more on this later.
5.Qb3
It makes sense to pressure Black's queenside when most of his pawns there are on light squares and the light-square bishop has been developed outside of its pawn chain.
5...Qb6
Again the most popular move, and again it has been played by Shirov, Short and Morozevich.
Position after 5...Qb6. How should White treat the position?
6.c5
A key point. White's second-most popular move, 6.Qxb6, helps Black as his a pawn is promoted to a more-central b pawn and he gets pressure down the a file.
After 6...axb6 the pawn on b6 is doubled, but is not really weak - after all, how can White attack it?
I am tempted to give 6.c5 an !, but that would be a bit rich as the idea is well-known.
6...Qxb3
It should not surprise that White is for choice after this.
But the alternative 6...Qc7 runs into 7.Bf4!, which is even better for White.
I do not have Bezgodov's book, but a friend does, and he reports that Bezgodov calls 4...c6 "unnecessarily passive."
Silman wrote in his review: "One major revelation for this reviewer is that after 1.d4 d5 2.Nf3 Bf5 3.c4 e6 4.Nc3, Black’s best move is not 4…c6. [typos corrected]"
7.axb3 h6?!
Giving his light-square bishop a refuge on h7 is only Black's fourth-most popular move. It scores much better percentage-wise than the more frequent 7...Nd7, 7...Na6 and 7...Nf6, but I find it hard to believe Black can afford to play so slowly when behind in development.
8.Bf4 Nd7 9.e3 Ngf6 10.h3?!
Analysis engines want me to get on with it with 10.b4.
My choice, like MB's at move seven, is typical of club players' obsession with structure over dynamism.
10...Be7 11.Be2?!
Again it was probably better to get on with White's thematic 11.b4 attack.
11...0-0 12.0-0 Rfc8
I guess the idea is to organise an exchange of bishops by ...Bd8-c7.
Komodo9 suggests an immediate 12...Ne4, but prefers White after 13.Nxe4 Bxe4 14.b4.
13.Ra4
Position after 13.Ra4. Black would love to be able to place a rook on b8 to make his defence easier
13...Ne4
The idea of ...Bd8-c7 is too slow, eg 13...Bd8 14.Rfa1 a6 15.b4 Bc7 16.Bxc7 Rxc7 17.b5 cxb5 18.Nxb5 Rcc8 19.Nd6 Rc7 and now comes the second b pawn: 20.b4.
14.Rfa1
White's pieces are well-placed for a queenside attack. The game continued:
14...Nxc3 15.bxc3 a6 16.b4
...with a large advantage.
Later, I was winning, but a series of weak moves in which I lost the thread of the position saw the game drawn after 47 moves.