Friday, 31 January 2020

Sharp Albin

PLAYED top board last night in division two of the Central London League for Battersea 3 against HMC 2.
John M Bennett (183) - Spanton (170)
Albin Countergambit
1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3
This is still the most popular move in ChessBase's 2020 Mega database, but is being increasingly challenged by 5.a3 (Emanuel Lasker's original choice back in 1893) and, to a lesser extent, by 5.Nbd2.
5...Nge7 6.Bg2 Ng6 7.Bg5!?
The main move is 7.0-0 but the text obliges Black to make an awkward-looking reply.
7...Qd7
The 'obvious' 7...Be7? is simply met by 8.Bxe7, when 8...Qxe7 9.Nxd4 drops the important d pawn. If Black then tries 9...Qb4+, White has 10.Nc3 with what Stockfish10 and Komodo10 reckon is a winning position.
8.0-0 h6!?
8...Ngxe5 9.Nxe5 Nxe5 10.Qc2?! (10.Qb3 is probably better) Qf5 worked out well in Jonathan Wells (2072) - Spanton (2020), Paignton (0-1, 54 moves), but the text is maybe even stronger.
JB revealed afterwards he had the position after 8...h6!? more than 20 years ago in Dubai. Back then he played 9.Bd2 but concluded that stronger is 9.Bc1. Nevertheless, for some reason he could not explain, this time he played ...
9.Bd2
9.Bf4 Nxf4 10.gxf4 g5!? 11.e3?! (11.Nbd2, as played by Boris Gelfand in a 2004 blindfold rapid loss to Alexander Morozevich, seems better) dxe3 12.Qxd7+ Bxd7 13.fxe3 Bc5 was good for Black in Roman Bradac (2031) - Spanton (1961), Highlands Open (Czech Rep) 2014 (0-1, 23 moves).
Not as bad as it looks is 9.Bh4?! Ngxe5 10.Nxe5 Nxe5, eg 11.Nd2 g5?! 12.f4. But 11...f6 really does threaten ...g5, and the engines reckon White has to play 12.g4 Qxg4 13.Bg3, although they have Black only slightly better.
9...Ngxe5 10.Nxe5 Nxe5 11.Qb3 Bc5 12.Bxb7!?
This looks impossible at first glance because of 12...Rb8, but then 13.Bxc8 Qxc8 14.Qa4+ was a little better for White in Trevor Coote (2104) - Spanton (1880), Hastings 2017-18 (1-0, 34 moves).
12...Bxb7 13.Qxb7 0-0 14.b4 Rab8 15.Qe4
15.Qa6? d3 gives Black a very strong attack.
Black to play and draw
*****
*****
*****
*****
*****
15...Nxc4! 16.bxc5 Rxb1 17.Raxb1 Nxd2 18.Qd3 ½–½
On 18.Qb7, I planned 18...Re8.
My updated Battersea statistics for 2019-20
Event*..Colour...Grade...Opponent's Grade...Result
CLL..…...B....…..168...………169...……….....W
CLL...…..B...…...168...………196...…………..D
CLL...…..W...…..168...………176...…………..L
LL....……W...…..168...…....…175...………….D
CLL...…..B...…...168...………192...…………..D
CLL...…..W...…..168...………181...…………..L
LL...…….W...…..168...………168...…………..L
EC...…….B...…..168...………175...……….….L
CLL...…...B.........170...………172...…………..L
LL...…….W...…..170...………183...…………..D
LL............W........170...…........180......……......L
LL....…….B...…..170....……...182...………….W
CLL...…...B...…..170...………183...……….….D
Overall this season for Battersea I have scored +2=5-6 for a grading performance of 164.
In season 2018-19 I scored +12=12-13 for a grading performance of 169.
In season 2017-18 I scored +10=8-9 for a grading performance of 175.
*CLL: Central London League; LL: London League; EC: Eastman Cup.

My Best Ever Tournament (part five)

Spanton (2096) - Marco Sbarra (2269)
Lausanne 1999 Round 5
Sicilian Maroczy Bind/English Symmetrical
1.e4 c5 2.c4!?
The idea is to proceed, depending on Black's response, with a Maroczy Bind or a Botvinnik formation in the English.
2...Nc6 3.Ne2 Nf6 4.Nbc3 e6 5.d4 cxd4 6.Nxd4 Nxd4?!
Black does not usually bring White's queen to d4 in the Sicilian if its position cannot be challenged with tempo. Normal is 6...Bb4.
7.Qxd4 d6 8.Bg5 Be7 9.0-0-0!?
Emphasising development, but it is very unusual for White to castle long in a Maroczy.
9...Bd7 10.f4 Qb6 11.Bxf6 gxf6?!
Probably better is 11...Bxf6, and if 12.Qxd6, then 12...Bc6 with very promising compensation for a pawn.
12.Qxb6 axb6 13.Kb1 Rg8 14.Rd2 Bc6 15.Bd3 0-0-0 16.Rhd1 Rg7
MS said in the postmortem he should have dispensed with this, at least in the short-term, and played 14...h5. The analysis engines Stockfish10 and Komodo10 agree.
17.Bc2!?
The engines strongly dislike this, preferring 15.g3.
17...h5 18.b4 f5 19.b5 Bxe4 20.Bxe4
Possibly better was 20.Nxe4.
20...fxe4 21.Nxe4 Kc7 22.Kc2
I spent a long time trying to make 22.f5 work but, after 22...Rg4 could not see 23.Re2. Having said that, there is nothing special about 22.f5 anyway.
22...f5 23.Nc3 Bf6 24.Re1 Re7 25.Rde2 Bxc3 26.Kxc3 Kd7 27.Kd4
I offered a draw.
27...Rg8
White to make his 28th move
*****
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28.a4?!
I was oblivious to the danger posed to the white position by the undefended f pawn being on the same rank as the king.
28...Ree8
Black can start to pressurise with 28...Rg4 29.Ke3 e5, when then position is, if nothing else, easier for Black to play.
29.Ra1?!
Prophylaxis on the a file, but prophylaxis over f4 was more important, calling for a move such as 29.g3.
29...Ra8?!
This accomplishes nothing; again, ...Rg4 was better.
30.Ra3?!
Correct was 30.Rae1, and if 30...Rge8, then 31.Ra1.
30...Rg4 31.g3?!
Almost certainly a better defence was provided by 31.Ke3.
31...e5+ 32.Ke3?
Other king retreats were better as now Black's next comes with check.
32...exf4+ 33.Kf3?
A fingerslip - I meant to play 33.gxf4.
33...fxg3 34.hxg3?
Yet another mistake. Better is first 34.Rae3, threatening mate-in-three.
34...Rxc4?
Stronger is 34...Rag8, but by now Black's advantage is so large that the text is probably good enough.
35.Rae3 Re4 36.Rxe4 fxe4+ 37.Rxe4 Rf8 38.Kg2?!
Centralisation with 38.Ke3 is almost certainly better.
38...Rf5 39.Kh3?
Further decentralisation!
39...d5 40.Rd4 Kd6 41.g4 hxg4+ 42.Kxg4 Rf7 43.Rd1 Kc5 44.Rc1+ Kb4 45.Rd1 Rd7 46.Rd4+
46.Kf5 Kxa4 47.Ke6 Rd8 48.Ke7 Rc8 49.Rxd5 Rc5 50.Rd7 Kxb5 also wins for Black, as the Nalimov endgame tablebase confirms.
46...Kc3 47.Rd1 d4 48.Kf3 d3 49.Ke3 d2 0-1

Thursday, 30 January 2020

New Opening That's All The Rage

PLAYED on board five last night for Battersea 2 against British Bangla in division two of the London League.
Nasir Rizvi (182) - Spanton (170)
'Barry Attack'
1.d4 d5 2.Nc3 e6 3.Bf4
3.e4 transposes to the French Defence. The text - first played in 1856 in Calcutta - introduces a cross between the Veresov (1.d4, 2.Nc3 and 3.Bg5) and the New London (1.d4 and 2.Bf4). One of its names is the New Veresov. I call it the Barry Attack, but this name is usually restricted for 1.d4, 2.Nc3 and 3.Bf4 against a black set-up involving an early kingside fianchetto. Another name is the Jobava-Prié Attack.
After the game, five Battersea players went to a nearby Wetherspoon. It turned out all of us, or perhaps it was just four of us, had faced 1.d4, 2.Nc3 and 3.Bf4 either that night or the night before. Clearly something is going on.
3...Bd6
The main move is 3...Nf6, as played in Moheschunder Bannerjee - John Cochrane, Calcutta 1856 (0-1, 37 moves), but the text has a better percentage score in ChessBase's 2020 Mega database.
4.e3!?
White's score leaps to an impressive 61% after this, and it can easily be seen that the text saves a tempo over 4.Bg3 and 4.Bxd6 Qxd6.
4...Bxf4
Trying to punish White's play. Black cannot necessarily delay this decision as 4...Nf6 has been met with 5.Qf3!? by Romanian international master George-Catalin Ardelean.
5.exf4 Nf6
Logical-looking is 5...Qd6!? but it is not liked, at least at first, by Stockfish10 and Komodo10, who continue 6.Qg4 Kf8 7.Qg3 with an unclear position that Stockfish10 reckons may slightly favour Black, but Komodo10 reckons favours White. As the saying has it, tests are needed.
6.Nf3 Qe7?!
Now 6...Qd6 can be met by 7.Ne5, which occurred in Richárd Rapport (2698) - Miklos Nemeth (2451), Zalakaros (Hungary) 2017 (1/2–1/2, 36 moves).
The problem with the text is that the e pawn will be pinned against the queen when a white rook lands on e1.
7.Bd3 Bd7?!
7...c5 8.dxc5 Qxc5 9.0-0 Nc6 10.Nb5 seemed slightly better for White in Igor Miladinović (2555) - Robert Markus (2625), Serbian Championship 2012, but was agreed drawn just eight moves later.
The text is what I suspect Garry Kasparov would call a half-move, ie one that is vaguely useful but does not get to the heart of the position. I was reluctant to play 7...0-0 as I feared White would castle long and launch a kingside pawn-storm.
8.0-0 0-0 9.Re1 c5 10.dxc5
10.f5 cxd4 11.fxe6 dxc3 12.exd7 Qxd7 looks fine for Black.
10...Qxc5 11.Ne5 Nc6
11...Qb4?! looks very greedy, but is maybe playable.
12.Re3!?
The engines prefer a slower build-up with, for example 12.Qd2.
12.g4!? is sharp. The engines continue 12...Qb4!? 13.Nxd7 Nxd7 14.Qf3 with a menacing-looking position for White, but the engines like Black.
12...d4!?
Forcing, but the engines prefer 12...Qb4 13.Rh3 g6 14.Qc1!? with an unclear position.
13.Ne4 Nxe4 14.Nxd7 Qd5
Not 14...Nxf2? 15.Nxc5 Nxd1 16.Rh3.
15.Bxe4 Qxd7
How should White proceed?
*****
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16.Bxh7+?
Unsound.
White has a slight edge after 16.Rd3, according to the engines.
16...Kxh7 17.Rh3+ Kg8 18.Qh5 f6 19.g4 Qe8 20.Qh7+ Kf7 21.g5 fxg5 22.fxg5 Ke7!?
A good practical choice, although the engines narrowly prefer 22...e5.
23.Re1
Objectively best is 23.Qxg7+!?, but 23...Qf7 forces queens off as Black threatens f2.
23...Qf7 24.f4 Rh8 25.Qd3 Rxh3 26.Qxh3 Rf8 27.Qa3+ Kd7 28.Qb3 Kc7!?
Another practical choice.
The game finished:
29.Qxe6 Qxf4 30.g6 Rf6 31.Qe8 Qg4+ 32.Kh1 Rf2 33.Re7+ Kb6 34.Rxb7+ Kxb7 0-1
My updated Battersea statistics for 2019-20
Event*..Colour...Grade...Opponent's Grade...Result
CLL..…...B....…..168...………169...……….....W
CLL...…..B...…...168...………196...…………..D
CLL...…..W...…..168...………176...…………..L
LL....……W...…..168...…....…175...………….D
CLL...…..B...…...168...………192...…………..D
CLL...…..W...…..168...………181...…………..L
LL...…….W...…..168...………168...…………..L
EC...…….B...…..168...………175...……….….L
CLL...…...B.........170...………172...…………..L
LL...…….W...…..170...………183...…………..D
LL............W........170...…........180......……......L
LL....…….B...…..170....……...182...………….W
Overall this season for Battersea I have scored +2=4-6 for a grading performance of 162.
In season 2018-19 I scored +12=12-13 for a grading performance of 169.
In season 2017-18 I scored +10=8-9 for a grading performance of 175.
*CLL: Central London League; LL: London League; EC: Eastman Cup.

My Best Ever Tournament (part four)

Martin Herzog (2260) - Spanton (2096)
Lausanne Round 4
Queen's Gambit Declined Semi-Tarrasch
1.d4 d5
My original notes say: "A change from my usual 1...Nf6, brought on by a desire to keep open the option of setting up a Stonewall." However, I cannot recall against which lines I planned to erect a Stonewall (pawns on c6, d5, e6 and f5).
2.c4 e6 3.Nc3 Nf6 4.Nf3 c5
Magnus Carlsen has played this potentially-sharp move, but he has also played all of the four more-popular moves: 4...Nbd7, 4...Bb4, 4...c6 and, most popular of all, 4...Be7.
5.cxd5 cxd4!?
This is what makes the variation sharp. Normal are 5...Nxd5 and 5...exd5.
6.Nxd4
This move should not cause Black any problems. Critical are 6.Qxd4 and 6.Qa4+ (followed by Qxd4), but MH explained in the postmortem he wanted to avoid "losing a tempo" to an attack on his queen after it arrives on d4.
6...Nxd5 7.Bd2
The main move, but it hardly creates a good impression.
7...Bc5 8.Nb3 Bb6 9.e3!?
The least popular of four moves in ChessBase's 2020 Mega database - 9.Nxd5 is most popular, followed by 9.g3 and 9.e4 - but it is liked by the analysis engines Stockfish10 and Komodo10.
9...0-0
This was a new move at the time, or at least it does not appear in Mega20 until 2004. 9...Nc6 had been played by a 2210 in 1993. The two moves can easily transpose.
10.Rc1!?
I gave this a question mark in my original notes, writing: "Frtiz5 likes this, but to me (and to MH after the game) it seemed premature when White still has his king's bishop to develop." It seems to me now the move is perfectly viable, if a little unusual.
10...Nc6 11.Be2 Ndb4 12.0-0 Nd3 13.Bxd3 Qxd3 14.Qe2 Rd8 15.Rfd1?!
The engines much prefer 15.Qxd3 Rxd3 16.Rfd1 and if, as in the game, 16...e5, then 17.Na4 or 17.Ne4 with approximate equality.
15...Qxe2 16.Nxe2 e5 17.Nc5
"MH's initial comment in the pm was that this was bad, but we could not find anything better." The engines give 17.Bc3 but much prefer Black after, for example, 17...Be6 18.Ng3 Rxd1+!? (I do not understand this - can anyone explain?) 19.Rxd1 f5.
17...Bxc5 18.Rxc5 Be6 19.Nc3 Rd7 20.Kf1 Rad8 21.Ke2
How should Black proceed?
*****
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21...f6
Preparing ...Nb4. But I could have played 21...Nb4! as 22.Rxe5? fails to 22...Bc4+ 23.Kf3 (23.Ke1?? Nc2#) Nc6 24.Rc5 (24.Re4 Bd3 and ...Bc2) Rxd2 25.Rxd2 Rxd2, and White cannot continue 26.Rxc4? because of 26...Ne5+.
22.b3
22.a3? stops ...Nb4, but the cure is worse than the disease as Black replies 22...Bb3.
22...Nb4 23.Be1 Nxa2 24.Rxd7 Nxc3+ 25.Bxc3 Rxd7 26.b4
Black has emerged a pawn up, but the opposite-coloured bishops give White fair hopes of salvaging a draw.
26...Kf7 27.Bd2 Ke7 28.Rc3 b5?
Positionally hopeless. It was already difficult for Black to make progress on the queenside, but this makes it next-to-impossible.
29.Rc5?!
The rook is awkwardly placed here. A better way to highlight Black's mistaken 28th move is 29.Ra3.
29...Bc4+ 30.Kd1 Kd8 31.Kc2 Rd3 32.g3 Kd7 33.Bc3 a6 34.h4 h5 35.Bd2 Ke6!? 36.Rc7 g6?!
Effectively conceding the draw. The engines show 36...Rd6!? can be tricky for White, eg 37.Rxg7 Bb3+ 38.Kc3 Bd5! 39.Rc7?! Be4 40.Rc5 Kf5 (the point of playing ...Ke6 in the first place), when White is hard-pressed defending his kingside. However, the engines reckon 39.e4! Bxe4 40.Be3 gives decent drawing chances.
37.Rc6+ Rd6 38.Rxd6+ Kxd6 39.e4 f5 40.Kc3 fxe4 41.Be3 Ke6 42.Bb6 Kf5 43.Bc5 Kg4 44.Be3 Kf3 45.Bc5 Ke2 46.Be3 Kf3 ½–½

Wednesday, 29 January 2020

New ECF Grades Out Today!

MY grade in the new six-monthly list from the English Chess Federation has edged up from 168 to 170.
The new grades only marginally affect my last three performances for Battersea.
My updated Battersea statistics for 2019-20
Event*..Colour...Grade...Opponent's Grade...Result
CLL..…...B....…..168...………169...……….....W
CLL...…..B...…...168...………196...…………..D
CLL...…..W...…..168...………176...…………..L
LL....……W...…..168...…....…175...………….D
CLL...…..B...…...168...………192...…………..D
CLL...…..W...…..168...………181...…………..L
LL...…….W...…..168...………168...…………..L
EC...…….B...…..168...………175...……….….L
CLL...…...B.........170...………172...…………..L
LL...…….W...…..170...………183...…………..D
LL............W........170...…........180......……......L
Overall this season for Battersea I have scored +1=4-6 for a grading performance of 156.
In season 2018-19 I scored +12=12-13 for a grading performance of 169.
In season 2017-18 I scored +10=8-9 for a grading performance of 175.
*CLL: Central London League; LL: London League; EC: Eastman Cup.

New Year - New Championship

THE top division of the Battersea club championship got underway last night, with me paired against reigning champion Paul Stokes.
Stokes (158) - Spanton (168)
Catalan/Dutch Stonewall
1.Nf3 d5 2.d4 e6 3.g3 c6
Not liked by Stockfish10 or Komodo10, it is a viable option and has been chosen by grandmasters. The main moves are 3...Nf6 and 3...c5.
4.Bg2 f5 5.0-0 Nf6 6.c4 Be7
Magnus Carlsen has played the much more popular 6...Bd6.
7.b3 0-0 8.Ba3!?
Exchanging dark-square bishops is the main plan, but is strongly disliked by the engines. I guess they regard it as too time-consuming.
8...Bxa3 9.Nxa3 Qe7 10.Nb1
More popular are 10.Nc2 and 10.Qc1!?
10...Ne4 11.Nfd2!?
The main line goes 11.Qc2 Nd7 12.Nbd2, when Black is at least equal, according to the engines.
11...e5!?
Probably a new move. The engines prefer the known 11...Nd7.
12.Nxe4 fxe4?
An 'automatic' move played much too quickly. Black seems fine after 12...dxe4, when the engines continue 13.Nc3 Rd8 14.d5 with an unclear but roughly equal position.
13.cxd5?!
White poses more problems with 13.Nc3 according to the engines. They continue 13...Be6 14.dxe5 Rd8 15.Qd4 dxc4!? 16.Qxe4, giving White the upper hand.
13...cxd5 14.Nc3 Be6?
Better is 14...Rd8 15.dxe5 Nc6 (not 15...Qxe5?? 16.Nxe4) 16.Rc1 Qxe5.
15.dxe5 Rd8 16.Rc1
Not 16.f4?? Qc5+.
16...Nc6 17.Nb5
Also strong is 17.f4.
17...Nxe5 18.Nc7 Rac8?
Black had to play the modest 18...Rab8.
How should White proceed?
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*****
19.Nxe6?
19.Nxd5 wins substantial material, eg 19...Qf7 (or 19...Rxd5 20.Rxc8+) 20.Rxc8 Bxc8 21.Bxe4.
19...Qxe6 20.Qd2 Nc6 21.Qe3 Re8 22.f3 Rcd8 23.fxe4 d4!?
23...dxe4 24.Rc4.
24.Qd2 Ne5 25.Qg5 d3?!
The engines prefer 25...h6 26.Qf5 Qe7 with reasonable, if not complete, compensation for a pawn.
26.exd3 Nxd3 27.Rc2 Qb6+ 28.Kh1 Re5 29.Qg4 Ree8 30.Qe2 Ne5
Black's threats are over.
31.Rd1 Qa5?!
Almost certainly better is 31...Rxd1+ 32.Qxd1 h6, asking White how he will break the blockade.
32.Rd5 Qb6 33.Rxd8
Activating the bishop with 33.Bh3 is natural, but White is also much better after the text.
33...Rxd8 34.Rd2 Rc8 35.Bh3 Rc1+ 36.Rd1 Rc3?
Missing White's reply. After 36...Rxd1+ 37.Qxd1 Qc6 Black still has defensive chances.
37.Qh5 Nf7
Not 37...Ng6? 38.Qd5+ Kf8 39.Rf1+.
38.Qd5 Qc6?
But 38...Rc5 39.Qe6 Qxe6 40.Bxe6 Kf8 41.Rf1 Rc7 42.Kg2 also wins.
39.Be6 Qxd5 40.exd5 Kf8 41.Rf1 1-0

My Best Ever Tournament (part three)

Josef Gheng (FM 2326) - Spanton (2096)
Lausanne 1999 Round 3
Sicilian Hyper-Accelerated Dragon
1.e4 c5 2.Nf3 g6 3.c3 Bg7 4.Bc4 e6 5.0-0 Ne7 6.d4 cxd4 7.cxd4 d5 8.exd5 Nxd5 9.Nc3!?
This move makes its first appearance in ChessBase's 2020 Mega database in 2001. Two previous, high-level, games saw 9.Bg5, with both games ending in quick draws.
9...Nxc3 10.bxc3 0-0 11.Qe2 b6?
I completely missed White's threat
*****
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12.Qe4 Ba6 13.Qxa8 Bxc4 14.Qxa7!?
Komodo10 comes to rate this equally with 14.Rd1, but Stockfish10 reckons White should keep the exchange. Generally speaking, in my opinion, Komodo10 gives greater weight to positional considerations over material ones when compared with Stockfish10's evaluations.
14...Nc6 15.Qa4 b5 16.Qd1 Bxf1 17.Qxf1 Qd5!?
My original notes show Fritz5 preferred 17...b4 18.cxb4 Nxb4, and Komodo10 comes to agree with this. Stockfish10 prefers the text, but both modern engines reckon best for Black, albeit by a small margin, is 17...Qa5.
18.Rb1 Ra8 19.Qxb5 Qxb5 20.Rxb5 Rxa2 21.Bb2?!
JG suggested 21.Bd2 in the postmortem, and this does seem to leave White less tied-up.
21...Na5?!
Stockfish10 and Komodo10 reckon 21...Bf8 equalises, eg 22.g3 Nb4! 23.cxb4 Rxb2 etc.
22.Rb8+ Bf8 23.Ne5
Walking into a pin with 23.Nd2! is better, according to the modern engines. The point is that after 23...Nc6 24.Rb6 Nb4, White does not have to capture the black knight, with a line similar to the previous note, but can instead play 25.Nc4, with advantage.
23...Kg7 24.Nd3 Nc4 25.g3 Bd6 26.Rb5 Kf6 27.Kg2 h5 28.h4
As my original notes say: "All Black's pieces are better than White's, so there really should be good drawing chances."
28...e5 29.Bc1
Best, according to Stockfish10 and Komodo10.
29...Rc2 30.Bg5+ Ke6 31.Nc5+ Bxc5 32.Rxc5 Rxc3 33.dxe5 Rc2 34.Bf4 Kf5
Not 34...Ne3+?? as White's rook is protected after 35.Bxe3.
35.Kh3
Not 35.Rc7?? as now ...Ne3+ works.
35...Na3 36.Ra5
36.Rxc2? allows an easy draw as White cannot hold on to the e pawn.
36...Nc4 37.Ra7 Nxe5 38.Bxe5 Kxe5 39.Rxf7
White has maintained an extra pawn, but the position is one of the easier pawn-down book draws. Having said that, Stockfish10 reckons White has the upper hand, while Komodo10, whose endgame evaluations I tend to trust more, has White the equivalent of 0.62 pawns ahead.
39...Rc4 40.Rf8 Ra4 41.Kg2 Rb4 42.Ra8 Kf6 43.Ra6+ Kf5 44.Ra5+ Kf6 45.Kh3 Rc4 46.Rg5 Rc2 47.Kg2 Rc4
There was a lot more like this until JG conceded the draw after 82 moves.

Tuesday, 28 January 2020

My Best Ever Tournament (part two)

Spanton (2096) - Vladimir Tukmakov (2581)
Lausanne 1999 Round 2
Caro-Kann Panov-Botvinnik
Vladimir Tukmakov is a Ukrainian grandmaster whose best results, according to Wikipedia, were in the days of the Soviet Union when he finished second to Bobby Fischer at Buenos Aires 1970, second to Anatoly Karpov at Madrid 1972 and first ahead of Tigran V Petrosian at Vilnius 1978.
1.e4 c6 2.c4 d5 3.cxd5 cxd5 4.exd5 Nf6 5.Nc3 Nxd5 6.d4 e6 7.Nf3 Bb4 8.Bd2
By a slightly unusual move-order, we have reached one of the main variations of the Panov-Botvinnik. I had just bought Jacob Aagaard's Easy Guide To The Panov-Botvinnik Attack - it had been published by Cadogan in the previous November - and had started playing the opening to learn how to use an IQP.
8...Nc6 9.Bd3 Nf6 10.0-0
Aagaard only covers 10.a3, which turns out for quite some time to be Stockfish10's top choice, narrowly ahead of the mainline text.
10...0-0
White seems to get more than enough compensation for a pawn after 10...Nxd4?! 11.Nxd4 Qxd4 12.Be3.
11.Qe2!?
However this move is labelled a "reckless pawn sacrifice" in Karpov & Mikhail Podgaets' 2006 Batsford book, Caro-Kann Defence: Panov Attack. Normal is 11.Bg5.
11...Be7
Critical is 11...Nxd4!? 12.Nxd4 Qxd4, when Larry Christiansen (2563) - Yasser Seirawan (2647), USA Championship 2000 (Seattle), quickly finished 13.Rfd1 Qg4 14.Qxg4 Nxg4 15.Be2 Nf6 16.Bf3 Bxc3 17.Bxc3 Nd5 18.Bxd5 exd5 19.Rxd5 Bxe6 ½–½.
12.Rad1
Here the main move is 12.Ne4, but the text scores a better percentage in ChessBase's 2020 Mega database.
12...Nb4
Again Black can try grabbing the pawn. After 12...Nxd4 13.Nxd4 Qxd4, Stockfish10 and Komodo10 suggest 14.Bg5, which has been seen in three high-level games, with all three possible results having occurred.
13.Bb1 b6 14.Ne4!?
14.Rfe1 was played in Mihai Suba (2500) - Petrosian (2605), Interzonal 1982 (Las Palmas), which continued 14...Bb7 15.Ne5 Rc8 16.Qe3, transposing to a position that had been reached by Petrosian as White in 1967 against Miguel Najdorf. The latter played ...Nfd5 and lost; Petrosian, against Suba, played ...g6 and drew.
14...Ba6?!
This natural-looking move may be a mistake. My move 14.Ne4!? only appears once in Mega20, in the game Petra Papp (2256) - Pal Kiss (2362), Hungarian team championship 2011, and was met by 14...Nbd5 15.Ne5 Bb7 (½–½, 26 moves).
15.Nxf6+ gxf6
How should White proceed?
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16.Bxh7+?
In playing my 14th move, I had missed that 16.Qe4 is met by 16...f5. I thought the bishop sacrifice gave me my best chance of saving the game, but the engines point out 16.Qe3, when 16...Bxf1? leaves White on top after 17.Bxb4 Bc4 (17...Bxb4?? 18.Qh6) 18.Bxe7 Qxe7 19.Nd2, eg 19...Bd5 20.Qg3+ Kh8 21.Qh4. Best for Black, according to the engines, is 16...Nd5, when 17.Qh6 f5 18.Rfe1 is slightly better for White, they reckon.
16...Kxh7 17.Qe4+ f5 18.Qf4 Rh8
Best, according to the engines.
19.Ne5 Kg8 20.Rfe1 Nd5?!
The engines much prefer 20...Kf8.
21.Qg3+ Kf8 22.Ng6!
My notes show Crafty - I do not know which version - did not like this move, but it is definitely White's best shot, according to modern engines.
22...fxg6 23.Qxg6 Qd6?
I recall being worried about 23...Bc8, which is indeed better than the text. But best, according to Stockfish10 and Komodo10, is 23...f4, blocking White's bishop from the kingside. They continue 24.Rxe6 Bc8 25.Re5, and now 25...Qd6!? or 25...Qe8!? to get queens off at the cost of returning some material, eg 25...Qd6!? 26.Qxd6 Bxd6 27.Rxd5 Ke7, when Black's extra bishop is worth much more than White's extra three pawns, according to Stockfish10, although Komodo10 is not so sure.
24.Bh6+ Rxh6 25.Qxh6+ Kf7 26.Qh7+ Kf6 27.Qh6+ Kf7 28.Qh7+ Kf6 29.Qh6+ ½–½
Tukmakov could have played on with 25...Ke8, but Stockfish10 and Komodo10 reckon 26.Rxe6 Qf4! (this seems an only-move) 27.Qh8+ Kf7! 28.Rxe7+! Nxe7 (it is important that the knight protects the black king from a check at a7) 29.Qxa8 Be2 is dead-level despite the unbalanced material (White has rook and three pawns for bishop and knight).

Monday, 27 January 2020

My Best Ever Tournament

MY rating has taken a hammering in recent weeks.
At the start of December I was 1951 - my highest rating in almost a year.
Now I am 1854 and fast approaching my all-time low of 1821 from July 1917.
It has got me thinking about better times, and specifically how to recapture those times.
I do not know if I have the answers, but my musings reminded me of a tournament where everything, or almost everything, went right.
I guess we all have occasional tournaments like that, but, for me, Lausanne 1999 was something really special.
In a way it should not have been special at all as I was feeling off chess when I flew to the French-speaking city on the Swiss shore of Lake Geneva.
The tournament was a nine-round swiss over five days, but I was so uninterested that I did not bother to take my computer or any chess books.
My results soon rekindled my enthusiasm.
Jānis Klovāns (GM 2465) - Spanton (2096)
Lausanne 1999 Round 1
Sicilian Accelerated Dragon
Klovāns' Wikipedia entry shows he was a nine-tine Latvian champion, being awarded his grandmaster title for winning the 1997 world senior championship. He was to win the world seniors again in 1999 and 2001, the latter year also seeing him become a correspondence GM. His elo peaked at 2530 three years before my game against him, and the entry speculates that his position as a career officer in the army of the Soviet Union reduced his chances to travel abroad and earn Fide norms. Klovāns died in October 2010, aged 75.
1.e4 c5 2.Nf3 g6 3.d4 cxd4 4.Nxd4 Bg7 5.Nc3 Nc6 6.Be3 Nf6 7.Bc4 Qa5 8.0-0 0-0 9.Bb3 b6!?
I was certainly out of theory by now, and probably had been for some time as the Accelerated Dragon was a new part of my repertoire. My notes at the time show the analysis engine Rybka3 "quite likes my choice; Stockfish4 doesn't." Stockfish4's modern descendant, Stockfish10, at first rates ...b6 equally with the normal ...d6, but very quickly agrees with Komodo10 that the move is not good.
10.Nd5!?
9.b6!? first features in ChessBase's 2020 Mega database in 2008, played by a 2238, and again last year, played by an 1196. Both games saw White reply 10.f4 and win.
10...Nxd5 11.exd5 Nxd4 12.Bxd4 Bb7
Stockfish10 and Komodo10 quickly come to prefer my other major thought of 12...e5, when after13.dxe6 dxe6 14.Bxg7 Kxg7 15.Qd4+ my notes say White is better "thanks to his superior bishop and safer king." However, the modern engines reckon Black is fine after 15...e5 or 15...Kg8.
13.Re1 e6
Immediately on moving, I realised White has a possible combination.
14.Bxg7 Kxg7 15.Qd4+ Kg8
How should White proceed?
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16.Rad1
Klovāns thought for some time here, presumably looking at 16.dxe6 dxe6 17.Rxe6!? Qg5 (after 17...fxe6? 18.Bxe6+ Rf7 19.Bxf7+ Kxf7 20.Qd7+, White emerges two pawns up) 18.g3 fxe6 19.Bxe6 Rf7 20.Qd7 Qf6 21.Qxb7 Qxf2+ 22.Kh1 Raf8, and now 23.Bxf7+ Rxf7 24.Qe4 leaves White up a pawn, but Black has full compensation, according to Stockfish10 and Komodo10. This is a long line, but most of it is forced and I was able to calculate it at the board. What I missed is that White has alternatives at move 23, with the modern engines reckoning 23.Rd1 or 23.Qe4 gives White a slight edge. However, they are not sure about this, and anyway the edge is small, so no wonder Klovāns did not go down this line.
16...Bxd5!?
Swopping off into an ending I hoped to hold.
17.Bxd5 Qxd5 18.Qxd5 exd5 19.Rxd5
In going for the ending, I had judged that 19.Re7 Rfe8 20.Rxd7 Re2 gives Black sufficient counterplay. The modern engines' 20...Rac8 is probably even better.
19...Rac8 20.c3 Rfe8 21.Rxe8+ Rxe8 22.Kf1
Black's extra pawn-island means White is better, but by how much?
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Komodo10 and Stockfish10 reckon White's edge is worth less than half a pawn (much less in Komodo10's case). However, even though this is a rook-and-pawn ending, I was not expecting to be offered a a draw anytime soon …
22...Re7 23.a4 Kf8 24.a5 Ke8 265axb6 axb6
The number of pawn-islands remains the same, but now Black has two isolanis.
26.Rd6 Re6
Black has no choice but to allow a pawn-ending.
27.Rxe6+ fxe6!
My notes show Fritz5 "narrowly prefers" 28...dxe6, as does Stockfish10 and, given enough time, Komodo10, but I was not about to allow White a farside pawn-majority.
Having typed this, and so given Komodo10 and Stockfish10 more time to consider the position, I am chuffed to find they have come to prefer my move, and so I have upgraded ...fxe6 from !? to !
28.Ke2 d6!?
My thinking here was that the text, as opposed to the more obvious 29...Ke7, would allow me to meet Kd3-c4 with …Kd7-c6.
29.Ke3 Ke7 30.Kf4 Kf6 31.h4 h5?!
Komodo10 and Stockfish10 at first much prefer 31...d5, and if 32.g4, then 32...e5+, but come to view the text as also good enough to hold. Nevertheless, my move makes matters trickier.
32.c4 d5?
Any king retreat is correct. The text loses.
33.cxd5 exd5 34.f3?
Missing the win, which the engines show is to be had by, for example, 34.b4 (34.b3 also seems to win) b5 35.Ke3 Ke5 36.Kd3, when Black will run out of tempi and so lose the d pawn, one line going 36...Kf5 37.Kd4 Ke6 38.f3 Kd6 39.g4 Ke6 40.g5 Kd6 41.f4 Ke6 42.Kc5 Kf5 43.Kxd5 Kxf4 44.Ke6 Kg4 45.Kf6 Kxh4 46.Kxg6 Kg4 47.Kf6 etc.
34...Ke6 35.g4
The push b4 is no longer a major threat as it can be met by, among other moves, ...Kf6. But trickier is 35.Ke3!? when, according to the engines, Black has to find 35...Kf5! as 35...Ke5 sees Black end up in zugzwang again after 36.g3, eg 36...b5 37.b4 Ke6 38.Kd4 Kd6 39.g4, as in the previous note.
35...Kd6 36.gxh5 gxh5 37.Kf5 Kc5 38.f4 Kc4 39.Ke5 d4 40.Ke4 d3
Also drawing is 40...b5 41.f5.
41.Ke3 d2 42.Kxd2 Kd4 43.f5 Ke5 44.Ke3
Or 44.f6 Kxf6 45.Ke3 Ke5=.
44...Kxf5 45.Kf3 Ke5 ½–½
Afterwards, Klovāns complained that the ending had been too simple to create winning chances, but, as we have seen, that was not the case.

Sunday, 26 January 2020

Another Instructive R+P Ending

HERE is the game from round seven of the Mariánské Lázně 50+ seniors that I was too ill/tired to annotate on the day.
As I thought, I did indeed miss several wins in the rook-and-pawn ending.
Spanton (1854) - Hana Palkova (1874)
Sicilian Closed
1.e4 c5 2.Nc3 Nc6 3.Nge2 a6 4.g3 g6 5.Bg2 Bg7 6.0-0 d6 7.d3 e6 8.Be3 Nge7 9.Qd2 Nd4 10.Nd1 Nxe2+!?
This surprised me. Normally Black waits for c3 to be played before exchanging, but the move is liked by Stockfish10 and Komodo10.
11.Qxe2 Rb8 12.c3 0-0 13.d4 b6 14.Qd2 Bb7 15.Bh6 f5!?
15...Bxh6 16.Qxh6 cxd4 17.cxd4 Nc6 18.d5 was played in Gyula Horvath (2420) - Laszlo Zsinka (2355), Hungarian Championship 1993 (1-0, 31 moves).
16.Bxg7 Kxg7 17.exf5 Bxg2 18.Kxg2 exf5 19.f4 Ng8 20.Nf2 Nf6 21.d5 Qd7 22.Rfe1 Rfe8 23.c4 b5 24.b3 bxc4 25.bxc4 Rb4 26.Qc3 Kf7 27.a3 Rbb8 28.Rxe8 Rxe8 29.Re1
The game looks set for an early draw, but HP decides to unbalance the position.
29...Ne4!?
I thought this was simply a mistake, but I misjudged the energy Black's position gets from having a passed pawn.
30.Nxe4 fxe4 31.Re3 Qa4 32.Qb3 Qxb3 33.Rxb3 e3 34.Kf1 e2+?!
Better, according to the engines, is 34...Re4, when one line they give runs 35.Rb7+ Kf6 36.Rd7 Rxc4 37.Rxd6+ Kf5 38.Re6 Rc2 39.Rxe3 Rxh2 with equality.
35.Ke1 Re4 36.Rb6 Rxc4 37.Rxd6 Ra4 38.Rc6?!
38.Rd7+ seems stronger.
38...Rxa3 39.Rxc5 Ra1+ 40.Kxe2 Ra2+ 41.Kf3 Rxh2 42.Rc7+ Ke8 43.Ra7 Rd2 44.Ke4 Rg2 45.Rxh7 Rxg3 46.Ra7 Ra3 47.Ke5 a5 48.Rg7 Rg3?
Presumably missing White's reply. Correct is 48...Re3+ 49.Kd6 Rb3 with what the engines reckon is just a small edge for White.
49.f5 g5 50.Ra7?
White is still much better after this, but stronger was 50.f6.
50...Ra3!?
Objectively best, according to the engines, is 50...g4, but the simple pawn-winning reply 51.Rxa5 makes a human understandably look for something else.
51.Ke6
Still even more convincing is f6.
51...Re3+ 52.Kf6 g4 53.Rxa5?
Winning is 53.Kg7, followed by pushing the f pawn.
53...g3 54.Ra2 Rd3?
54...Kd7 draws, as does 54...Rf3, according to the engines.
55.Ke5?
Winning is 55.Re2+ eg 55...Kf8 56.Ke6 Ra3 57.d6 Rd3 58.d7 Rd1 59.f6 Rd3 60.Rc2 Re3+ 61.Kf5.
55...Re3+ 56.Kf4 Rd3 57.Ke4 Rb3 58.Rg2 Ke7 59.Ke5 Re3+ 60.Kf4 Rd3 61.Rxg3 Rxd5 62.Kg5 Kf7 63.Ra3 Rd7 64.Ra6 Rb7 65.Rh6 Rb1 66.Rh7+ Kg8 67.Ra7 Rg1+ 68.Kf6 Rf1 69.Ra5 Rf2 70.Ke6 Re2+ 71.Kf6 Rf2 72.Ra8+ Kh7 73.Ke6 Re2+ 74.Kf7 Rb2 75.Re8 Rf2?
This loses. The rook needs to be able to check from the flank, so easiest is 75...Rb5, eg 76.f6 Rb7+ 77.Re7 Rb8.
76.f6 Rb2
White's last chance to win
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77.Re7?
Winning is 77.Kf8, eg 77...Kg6 78.f7 Rb7 79.Re6+ Kf5 80.Rh6 Rb8+ 81.Kg7 Rb7 82.Kg8.
77...Rb8 78.Ke6+ Kg8 79.Kf5 Rb1 80.Re4 Kf7 81.Re7+ Kf8 ½–½

Saturday, 25 January 2020

Ridiculous Blunder

PLAYED  a Scot in this morning's ninth and final round of the Mariánské Lázně 50+ seniors.
White to play and draw in Spanton (1854) - Ian Aird (1857)
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49.Rd4??
The double-question mark is not so much for playing a losing move - the position is not simple - but because I knew how to work out whether the pawn-ending is drawn or lost, but I played the text anyway.
The only drawing move is 49.Re4+!!, and after 49...Kf5, 50.Re1!! Stockfish10 and Komodo10 reckon Black's best try is 50...Rf2 51.Kd4!! Kf4 52.Re4+! Kg3 53.Re3+! Kg4 54.Re1!! f5 55.Ke3! Rg2 56.Rf1! Rg3+ 57.Ke2! So far all of White's moves have been only-moves, and I have tried to punctuate them in line with the John Nunn endgame convention.*
From now on it gets easier for White, for example 57...f4 allows five drawing moves, all with the rook, including 58.Rh1, while 57...Rh3!?, which is probably Black's best shot, allows two, 58.Rg1+ and 58.Rf2 (all analysis courtesy of the Nalimov endgame tablebase).
The game finished:
49...Rxd4+! (still using the Nunn convention) 50.Kxd4 Kf5 (for some reason I had only considered 50...f5??) 51.Ke3 Kg4 52.Ke2 Kg3 53.Ke3 f5 0-1
My final score of +4=2-3 saw me lose 11.2 Fide elo.

*From Wikipedia:
In his 1992 book Secrets Of Rook Endings and other books in the series (Secrets Of Minor-Piece Endings and Secrets Of Pawnless Endings), John Nunn uses … symbols in a more specific way in the context of endgames where the optimal line of play can be determined with certainty:
 ! - The only move which maintains the current evaluation of the position: if the position is theoretically drawn, this is the only move which does not lose; if the position is theoretically won, this is the only move which secures the win. An "!" is used no matter how trivial the move in question; the only exception is if it is the only legal move.
 !! - A particularly difficult-to-find "!" move.
 ? - A move which negatively affects the evaluation of the position: if the position had been drawn before the move, it is now lost; if won before the move, it is now drawn or lost.
 ?? - An obviously bad "?" move.
 !? - A move which makes the opponent's task harder or one's own task easier; for example, in a theoretically lost position, a move which forces the opponent to find several "!" moves in order to win.
 ?! - A move which makes the opponent's task easier or one's own task harder; for example, in a theoretically won position, a move which requires several subsequent "!" moves in order to win (Nunn 1999).
This convention has been used in some later works, such as Fundamental Chess Endings and Secrets Of Pawn Endings by Karsten Müller and Frank Lamprecht, but it can be safely assumed the convention is not being used unless there is a specific note otherwise. The Nunn convention cannot be used to annotate full games because the exact evaluation of a position is generally impractical to compute.

Friday, 24 January 2020

Another Exciting Endgame Tussle

MY opponent in today's round eight of the Mariánské Lázně 50+ seniors is rated only just above 1600 but is having an amazing tournament.
After seven rounds his expected score (based on opponents' ratings) was a paltry 0.78, but he was actually on 4.0.
Vladimir Koci (1607) - Spanton (1854)
Réti System
1.Nf3 d5 2.e3!?
Believe it or not, this move has been frequently played by Nakamura, and also by Kramnik and So. I guess it is one way to avoid sharp theory, not that any of those players need to do that.
2...Nf6 3.c4 e6 4.Nc3 c5 5.cxd5 exd5 6.d4
The position is now more reminiscent of a Tarrasch Defence in which White has not gone for the mainline kingside fianchetto, or the Normal Variation of the Queen's Gambit Declined.
6...Nc6 7.Bb5!?
The main move is 7.Be2, but the text has been played by Carlsen, Kasparov and Kramnik.
7...a6!?
Not liked by Stockfish10 or Komodo10, but it has been tried by strong players.
8.Bxc6+ bxc6 9.Ne5
Kramnik here played 9.0-0, while Tal preferred 9.Qa4. The text was played by the Czechoslovakian Opočenský in a 1936 draw against Alekhine.
9...Bd7
Alekhine offered a pawn with 9...Bd6!?, and Opočenský declined it with 10.f4!? Critical is 10.Nxc6 Qb6 (or 10...Qc7 11.dxc5 Bxc5 12.Nd4) 11.dxc5 Qxc5 12.Nd4, when both players presumably felt the bishop-pair, combined with White having a slightly-bad remaining bishop, was reasonable compensation for a pawn.
10.Qa4 Bd6 11.Nxd7 Qxd7 12.dxc5 Bxc5 13.0-0 0-0 14.Qc2 Bd6 15.Ne2 Ng4?!
More or less pointless as it encourages a response (15...h3) that will probably prove useful anyway.
16.Nf4?!
Simple and good was 16.h3 as 16...Nh2?? 17.Rd1 Nf3+ 18.gxf3 Qxh3 is easily met by 19.f4 or 19.Ng3.
16...f5!?
Still dreaming of a kingside attack, but maybe I should have got on with development.
Interesting is 16...g5!? 17.h3 Nxe3 18.fxe3 gxf4 19.exf4 with a position the engines evaluate as equal. If 17.Nh5?, then 17...Bxh2+ 18.Kh1 Bc7, and if 19.f3, then 19...Qd6. And if 17.Nh3?, then 17...Nxh2 18.Rd1 Nf3+ 19.Kh1 f6 is convincing enough.
17.h3 Nf6 18.Bd2
The engines give 18.b3 g5!? 19.Ne2 g4 with an unclear position.
18...Ne4
Again possible is ...g5!?, eg 19.Ne2 g4, and again it is not clear.
19.Rac1 Bxf4?!
Probably the wrong plan. Stockfish10 gives 19...Rac8 20.Bc3 Rfe8 21.Qd3 g5!? Komodo10 likes 19...Rab8 20.Rfd1 Rbc8!? 21.Ne2 Rfe8. But in each case the engines frequently change their move-choices and their evaluations.
20.exf4 Rfc8?!
The immediate 20...c5 looks better as then 21.Be3 can be met by 21...d4. True, this is not threatening to win the bishop after 22.Rfd1, but 22...Qe6 keeps the balance.
21.Be3 c5
Not 21...d4? 22.Qc4+.
22.f3 Ng3 23.Rfe1 d4 24.Qc4+ Qf7 25.Bf2
25.Bd2 was even stronger, according to the engines.
25...Nh5 26.g3 Rab8?
The engines prefer 26...Qxc4 27.Rxc4 Rab8, but White is still better after 28.b3.
27.b3
We both missed that White wins a pawn with 27.Qxa6! as 27...Ra8? runs into 28.Rxc5!
27...g6?
Again better was ...Qxc4 to stop White capturing on a6.
28.Re5
28.Qxa6!
28...Qxc4 29.Rxc4 d3 30.Rexc5 Rd8 31.Rc1 Rb7 32.Rc8 Rbd7 33.Rxd8+ Rxd8 34.Rd1 Ng7 35.Be1 Ne6 36.Kf2 Kf7 37.Ke3?
White needed to bring his bishop out first by, say, 37.Bc3, as the text allows a surprisingly effective reply.
37...Nd4 38.Kxd3!?
Not 38.Rxd3?? Nc2+ 39.Kd2 Rxd3+ 40.Kxd3 Nxe1+ as the pawn-ending after 41.Kd2 Nxf3+ 42.Ke3 Ng1 43.h4 Ke6 44.Kf2 Nh3+ 45.Kg2 Nxf4+ 46.gxf4 Kd5 wins for Black.
And not 38.Rd2?? Nc2+ 39.Kf2 Re8.
38.Kf2 Nc2 seems equal.
The engines suggest 38.Ba5, but after 38...Nc2+ 39.Kd2 Rd5 40.Bb6 Rd6 41.Bc7 Rd7 42.Be5 Nb4 43.Ra1 Nc2 44.Rc1 Ke6 it is not clear if White can make progress.
38...Nxb3+ 39.Ke2 Rxd1 40.Kxd1 Nd4
White is a pawn up, and the engines reckon he is better, but the position seemed drawn to me.
41.Bf2 Nb5 42.Kc2 Ke6 43.Kd3 Kd5 44.g4 Nc7 45.h4 h5 46.gxf5 gxf5 47.Kc3 Ne6 48.Kb4 Kc6
48...Nxf4 49.Ka5 Nd3 50.Bg3 Kc6 also draws.
49.Kc4 Nxf4 50.Kd4 Ng6 51.a3 Kd6 52.Bg3+ f4 53.Be1 Ne5
Somehow I thought this won the f3 pawn.
54.Ke4 Ke6 55.a4 Kd6?
55...Ng6 holds the draw.
56.Bc3 Ng6 57.Bf6 Ke6 58.Bg5 Kf7 59.Kd5 Kg7
A miserable move to have to make, but 59...Ke8 60.Ke6 Nf8+ 61.Kf5 is even simpler for White.
60.Kc5 Ne5 61.Bxf4??
Throwing away the win. 61.Kb6 wins easily, eg 61...Nxf3 62.Bxf4 Nxh4 63.Kxa6, when the bishop guards against the h pawn queening while the knight cannot stop the a pawn.
61...Nd3+ 62.Kb6 Nxf4 63.Kxa6
But White is not lost. The position is dead-equal, according to the engines.
63...Kf6 64.Kb5 Nd5 65.Kc5 Ke6 66.a5 Nc7 67.Kd4 Na6 68.Kc4 Kd6 69.f4 Nc7 70.Kd4 Nb5+ 71.Kc4 Kc6 72.Kb4 Nd6
So far, so good, but what next?
White to play and draw
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73.a6
73.Kc3! draws, according to the engines. Their main line runs 73...Nf5 74.Kd3 Nxh4 75.Ke4 Ng6 76.f5 Nh8 77.Kf4 Nf7 78.f6, when the h pawn falls.
73...Nf5 74.Kc4 Nxh4 75.Kd3 Nf5 76.Ke2
Losing in a similar way to the game is 76.Ke4 h4.
76...Kb6 77.Kf3 Kxa6 78.Ke4 h4 79.Kxf5 h3 80.Ke6 h2 81.f5 h1Q 82.f6 Qe4+ 83.Kd6
Or 83.Kf7 Qf5 84.Ke7 Qe5+ 85.Kf7 Kb6 etc.
83...Qb4+ 84.Ke6 Qf8 85.Ke5 Qf7 0-1

Lasker's Spanish Inquisition (conclusions)

IN his 10 games with 5.d4 lines in the Spanish Exchange, Lasker scored +6=3-1, which is 75%.
If you remove the three games from simultaneous exhibitions, at least two of which were against master-strength opposition, his record is even more impressive: +5=1-1, or 78.6%.
The five wins were against Tarrasch (1908 world championship), Janowski twice (second Paris match), Capablanca (St Petersburg 1914) and Marshall (New York 1924).
The only blemishes on Lasker's record in these important games were a draw against Showalter (Cambridge Springs 1904) and a loss to Steinitz (1894 world championship).
Playing 4.Bxc6 was not Lasker's only weapon against the Spanish. He chose 4.Ba4 three times as often, but scored a much lower percentage - 63% with 4.Ba4, 82% with 4.Bxc6 (he was especially deadly with the follow-up 5.Nc3), according to ChessBase's 2020 Mega database.
The following traits can be seen in Lasker's 5.d4 Spanish Exchanges:
1. The white king usually stays in the centre, ready to support the white kingside pawns (but White castles long if circumstances dictate). White should not fear losing castling rights after a major-piece exchange on d1 - the king shuffles sideways to the e file.
2. With pawns on e4 and f4, the anti-positional thrust f5 can be surprisingly effective. If Black responds with ...f6, or has played the move earlier, the square e6 can become an outpost for a white knight. The Black f pawn can also be attacked by White's g pawn.
3. Piece exchanges generally favour White, even though a less-cluttered board usually enhances the power of a bishop-pair. This is because exchanges bring an endgame closer, which greatly favours White if the pawn-majorities are still as they are from the opening, ie White has a 4-3 kingside majority that can easily yield a passed pawn, while Black's 4-3 queenside majority can rarely do the same.
4. If both sides advance their pawn-chains and the pawns become fixed, this almost certainly favours the player with a knight rather than a bishop.
Here is one of my games, from last year's Pimlico summer congress, that illustrates some of the above points.
Spanton (171) - Gergely Kiss (207)
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.d4 exd4 6.Qxd4 Qxd4 7.Nxd4 Bc5!? 8.Be3 Nf6!?
Black's set-up is aggressive and has been tried by strong players, including Capablanca, but was condemned by Alekhine, who said it endangered the bishop-pair.
9.f3 0-0 10.Nf5!?
Alekhine's recommendation. Lasker played 10.Nd2 in a simul: https://beauchess.blogspot.com/2020/01/laskers-spanish-inquisition-part-four.html
10...Bb4
Three previous opponents of mine played the too-accommodating 10...Bxe3?!
11.c3 Bxf5 12.cxb4 Rfe8 13.Kf2 Bg6
As Alekhine warned, Black's bishop-pair is gone, but White's queenside pawn-formation is damaged. Stockfish10 and Komodo10 reckon White has the upper hand.
14.Nc3 Nd7 15.Bf4 Ne5 16.Rhd1
I cannot recall why I did not play 16.Nxe5. I guess I must have feared Black's bishop combining with his rooks in a way that White's knight cannot work with the white rooks.
16...Kf8 17.h3
Threatening to trap the bishop with 18.Bxe5 Rxe5 19.f4 etc.
17...f6 18.Bxe5
Now I exchange minors, and get a rook to the seventh into the bargain.
18....Rxe5 19.Rd7 Re7 20.Rad1 Ke8 21.Rxe7+ Kxe7 22.Ke3 Bf7 23.f4 Bc4 24.Rd4 b5 25.Rd2 a5 26.bxa5
How should Black proceed?
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26...Rxa5
Black seems to have excellent drawing chances with the engines' 26...b4!? Their main line runs 27.Na4 Bxa2 28.Nc5 Rxa5 29.Rc2, when White is a pawn down but Black's queenside is weak. The engines continue 29...Rb5 30.b3 Bb1 31.Rc1 Kd6! 32.Kd4 Rxc5 33.Rxc5 Bxe4 34.Kc4 Bxg2 35.Kxb4, when Black has two pawns for the exchange, and the reduced material makes a draw very likely.
27.a3
Better is 27.Kd4!, but I missed that 27...Bxa2?? loses to 28.b4.
27...Ra8 28.g3 h5!?
We have a typical Spanish Exchange ending of white knight and rook versus black bishop and rook. Usually White has much-the-better pawn-majority. Here that is not quite as pronounced as usual, but even so it will be difficult for Black to create a passed pawn. The text becomes Komodo10's top choice, but in my view is double-edged - it gains space, but puts another pawn on the same-coloured squares as the black bishop, which weakens Black's dark squares.
29.h4 g6!? 30.Kf3
The engines prefer the Lasker-like thrust 30.f5.
30...Rh8 31.Nd1 Rd8?
Definitely a mistake - removal of the rooks makes it much easier for the white knight and king to manoeuvre.
32.Rxd8 Kxd8 33.b4
Fixing the c pawns.
33...Ke7 34.Ke3 Kd6
KG offered a draw.
(The rest of the notes are from my original post about this game.)
Normally a bishop outplays a knight in an ending with rival pawn-majorities. But here White can stop Black activating his queenside majority, after which it is just a question of whether White can win or only draw with his kingside majority. Bearing in mind that Black's bishop is fairly bad - four out of six black pawns are on light squares - Black's practical chances of holding this ending are very low.
35.Kd4 Be2 36.Nc3 Bf3 37.a4 bxa4 38.Nxa4 Bd1 39.Nc5 Bf3 40.Nb7+
40.e5+ is probably a quicker way to win, but there is no harm in probing with the knight as Black cannot prevent White coming back to the e5+ idea.
40...Ke6 41.Nd8+ Kd7 42.Nf7 Ke6 43.Nd8+
I got cold feet about 43.Nh8 because of 43...f5, when 44.Nxg6 seems to be the only way to keep winning chances. White then has to be certain he is winning after both 44...fxe4?! and 44...Bxe4. I was not sure, but I was fairly confident that returning the knight to the queenside would win.
43...Kd7 44.Nb7 Ke6 45.Nc5+ Kd6 46.Nd3 Ke6 47.Ke3 Bg2?
This speeds defeat, as does 47...Bg4? 48.Nf2. Black had to play 47...Bd1 or 47...Bh1, but in each case White wins slowly but comfortably, eg 47...Bd1 48.Nc5+ Kd6 49.Na6 Ba4 50.Kd4 Bc2 51.e5+ fxe5 52.fxe5+ Kd7 (52...Ke6 53.Nxc7 Kf5 54.e6 Kf6 55.Kc5) 53.Ke3 Bf5 54.Kf4 Bc2 55.Nb8+.
48.f5+ gxf5
If 48...Kf7, then 49.Nf4.
49.Nf4+ 1-0

Thursday, 23 January 2020

Under The Weather

HAD a bad bout of diarrhea late last night and then spent most of today sleeping.
I probably should have withdrawn from the Mariánské Lázně 50+ seniors, but I turned up and drew as White against an 1874.
I seem to have missed several wins in a rook-and-pawn ending, but am much too tired to annotate the game now.

Lasker's Spanish Inquisition (part 10)

LASKER'S final Spanish Exchange as White came at New York 1924 against many-times US champion Frank Marshall.
Lasker - Marshall
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.d4 Bg4!?
A popular move against 5.0-0, but relatively rare here.
6.dxe5 Qxd1+ 7.Kxd1 0-0-0
For 7...Bc5?!, see https://beauchess.blogspot.com/2020/01/laskers-spanish-inquisition.html
8.Ke1!?
By getting out of the pin, White makes it harder for Black to capture the e5 pawn.
8...Bc5
Ernst Grünfeld three times played 8...f6!? against Siegfried Wolf, scoring a win and two draws.
9.h3 Bh5 10.Bf4
Stockfish10 and Komodo10 prefer 10.Ke2!?, which transposes to a known position where it is normally White to move.
10...f5!? 11.Nbd2
Black is very active after 11.exf6 Nxf6 - exactly the type of position Marshall loved.
White is two pawns up after 11.exf5 Bxf3, but the position is unclear.
11...Ne7 12.Bg5 Bxf3 13.gxf3 Rhe8 14.Rd1 fxe4?
This is too cooperative. The engines give 14...h6 15.Be3 Bxe3 16.fxe3, and now 14...fxe4, when 15.Nxe4 does not hit anything, so Black equalises the material with 15...Rxd1+ 16.Kxd1 Nf5 etc
15.fxe4?!
15.Nxe4 was almost certainly better.
15...h6 16.Bh4 Bd4 17.Nc4 g5 18.c3 Ng6 19.cxd4 Nxh4 20.Ke2 Rd7?!
The engines like the active 20...Rf8 21.Rhf1 (or 21.Rd3 Ng2/g6) Nf3 22.Ke3 Rf4.
21.f3 Ng6 22.Ne3 c5 23.dxc5 Nf4+ 24.Kf2 Rxd1 25.Rxd1 Rxe5?
Better is 25...Nxh3+ 26.Kg3 Nf4 27.Nd5 Nxd5, although White still has an advantage after 18.Rxd5.
26.Nd5 Nxh3+ 27.Kg3 g4 28.Nf6 h5 29.f4 Rxc5?!
The engines' 29...h4+ 30.Kxh4 (30.Kxg4?! Nf2+) Nxf4 looks a better try.
30.Re1 Rb5 31.e5 Kd8 32.Nxh5 Ke7 33.f5 Ng5 34.Kxg4
White is a pawn up again, at least temporarily, and the rest is fairly simple.
34...Nh7 35.Nf4 Rxb2 36.Nd5+ Kd7 37.e6+ Kd6 38.e7 Kxd5 39.Re6 Rg2+ 40.Kf4 Rg8 41.e8=Q Rxe8 42.Rxe8 c5?
This accelerates the loss, but the engines' best line, 42...Kd6 43.Re6+ Kd7 44.Rg6 is convincing enough for White.
43.Rd8+ Kc6
Or 43...Kc4 44.Rh8 Nf6 45.e5 etc.
44.Rh8 1-0

Wednesday, 22 January 2020

Bring Me Sunshine

YESTERDAY, being the double-round day in the Mariánské Lázně 50+ seniors, was naturally the sunniest day of the tournament so far.
Snow started falling as I returned to my hotel last night, and there was a heavy frost.
But this morning saw plenty of sunshine too, as these photos illustrate.

My game in the afternoon against an Austrian featured a very instructive rook-and-pawn ending - "very instructive" being a euphemism for lots of blunders.
Gerhard Pichler (1715) - Spanton (1854)
Round 6
London System
1.d4 d5 2.Nf3 e6 3.Bf4 Bd6 4.Bg3
Easily the most-popular move in ChessBase's 2020 Mega database.
4...Nf6 5.e3
Some players prefer 5.Nbd2 to prevent, or at least strongly discourage, 5...Ne4.
5...Ne4!?
Castling is the main move. Stockfish10 and Komodo10 are not keen on the text, presumably because it costs time.
6.Bxd6?!
This loses a clear tempo over 4.Bxd6. The engines like 6.Bd3 Nxg3, rating 7.hxg3 as giving White a small edge.
6...Qxd6 7.c3
Considering the bishops that remain, it makes sense to put pawns on dark squares. The text also removes the threat of ...Qb4(+).
7...0-0 8.Nbd2 Nd7!?N 9.Nxe4 dxe4 10.Nd2
10.Ng5 can be met by 10...f5, or the engines' 10...Qd5!?
10...f5 11.Bc4
11.Nc4 Qe7 12.Be2 was played in Sascha Georges (2310) - Urs Rüetschi (2265), 1993 Swiss Championship (½–½ ,19 moves).
11...Nf6 12.Qc2 Kh8 13.Be2!
The engines like this retreat, which vacates c4 for the white knight and does not lose a tempo as the black queen will have to withdraw.
13...Qe7 14.g3?
But I have no idea what this is about. Consistent was 14.Nc4 with a roughly level game.
14...e5 15.Nc4 exd4 16.cxd4 c5
The idea is to open lines before White castles and gets his rooks into play.
17.Rd1
The king will not be safe on the queenside after 17.0-0-0?
17...Be6 18.b3?!
Now Black gets an initiative.
Stockfish10 gives 18.dxc5 Qxc5 19.0-0 with perhaps a small edge for Black. Komodo10 gives 18.0-0 b5 19.Na5 c4 with what it reckons is equality, although Stockfish10 prefers Black.
18...Rac8 19.Qb2 b5 20.Ne5 c4?!
Probably too ambitious. The simple 20...cxd4 is good for Black after the forced reply 21.exd4.
21.bxc4 bxc4 22.Rc1 Rb8!?
Safer was 22...Rc7 as the c pawn cannot be taken, eg 23.Bxc4?? Rfc8 and White loses a piece.
23.Nc6??
Forking an opponent's queen and rook is always tempting, but here it loses.
The engines give 23.Qd2 Rfc8 24.0-0 Qb4 25.Qxb4 Rxb4 26.Rc3 Ne8!? 27.Rfc1 Nd6 with an equal position.
23...Rxb2 24.Nxe7 Rxa2?
Winning a pawn, but better was 24...Re8 25.Nc6 Rc8 26.Ne5 (26.Nxa7?? Rc7) Rxa2, which also wins a pawn without allowing White the counterplay he gets in the game.
25.d5!
The best try.
25...Bxd5?!
This lets White swop off into what the engines reckon is a drawn rook-and-pawn ending, so almost certainly better was 25...Nxd5 26.Bxc4 Nxe7 27.Bxe6 Ra6.
26.Nxd5 Nxd5 27.Bxc4 Rc8??
Black had to play 27...Ra5, when 28.Bxd5 Rxd5 gives an ending similar to the one in the game.
White to play and win
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28.Rb1??
Winning is 28.0-0 as my planned 28...Ra5 loses a piece to 29.Bxd5, since after 29...Rxc1 30.Rxc1 the bishop cannot be captured because of a back-rank mate threat.
28...Ra5?
Stronger is 28...Rc2 as White cannot play 29.Bxd5?? due to 29...Rc1+ 30.Rxc1 (30.Ke2? R8c2#) Rxc1+ 31.Ke2 and 31...Rxh1.
29.Bxd5!
The correct decision, according to the engines, who reckon the ending is drawn.
29...Rxd5 30.0-0 Rdc5 31.Rfd1 g6 32.Kg2 R5c7 33.Rd6 Kg7 34.Ra1 Rb8 35.Rda6 Rbb7 36.h4 Kf7
Bringing the king to the queenside is the only hope of making progress. But the engines continue to rate the position as dead-equal, not giving Black any credit for having an extra pawn.
37.Kh3 Ke8 38.Kg2 Kd8 39.h5 Rg7 40.hxg6 hxg6 41.Rd1+ Kc8 42.Rdd6 Kb8
Not 42...Kc7?? 43.Rac6+ Kb8 44.Rd8#.
43.Rxg6?!
Ironically, restoring material equality makes the defence trickier. An easy draw was to be had by 43.Rd8+ Kc7 44.Ra8 etc.
43...Rxg6 44.Rxg6 a5 45.Rg5?!
Easiest was 45.g4 fxg4 46.Rxg4 a4 47.Rxe4 a3 48.Ra4 Ra7 49.Rb4+ Kc7 50.Rb1 Kd6 51.f4 a2 52.Ra1 Kd5 53.Kf3, and Black even loses if his king heads for a1.
45...Rb5 46.g4 a4
White to play and draw
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47.Rh5!
This draws.
But not 47.Rxf5?? Rxf5 48.gxf5 Kc7 etc, nor 47.gxf5?? a3 etc.
The engines point out another draw: 47.Rg8+! Kb7 48.g5 a3 49.Rg7+ Ka6 50.Rg6+ Ka5 51.Rg8 Kb4 52.Ra8 Kb3 53.Kg3 a2 54.Kf4 Kb2 55.g6 a1Q 56.Rxa1 Kxa1 57.g7 Rb8 58.Kxf5 Kb2 59.Kxe4 Rg8.
47...a3 48.Rh1 fxg4 49.Ra1 Ra5 50.Ra2??
Losing a vital tempo. Drawing is 50.Kg3 Kc7 51.Kxg4 Kd6 52.Kf4 Ra4 53.f3 exf3+ 54.Kxf3 Kd5 55.Ke2 Kc4 56.Kd2 a2 (or 56...Kb3 57.Rb1+ Ka2 58.Rb8) 57.Kc2 as the white king arrives in time to protect the white rook.
50...Kc7 51.Kg3 Kd6 52.Kxg4 Ra4??
Another loss of a vital tempo. Winning is 52...Kd5 53.f4 exf3 54.Kxf3 Kc4 as the white king is too far away from the a file.
53.f4 exf3+ 54.Kxf3 Kd5 55.e4+ Kc4 56.Kf4 Kb3 57.Re2??
The final blunder. Drawing is 57.Ra1 Kb2 58.Re1 a2 59.Kf5 a1Q 60.Rxa1 Rxa1, when the remaining white pawn is too fast to be intercepted and caught by the black pieces (without giving up the black rook).
The game finished:
57...a2 58.Re3+ Kc4 59.Re1 a1Q 60.Rxa1 Rxa1 0-1

Lasker's Spanish Inquisition (part nine) - THE Game

NOW we come to one of the most famous games in chess history, about which more nonsense has been written than probably any other encounter.
Lasker - Capablanca, St Petersburg Finals Round 7, is famous despite being very much short of the fireworks that mark out most celebrated games.
As the story is usually told, Capablanca was running away with the tournament and only needed to draw against Lasker to virtually guarantee first place.

Lasker, as usual, began quite slowly and, with just four rounds to go, he was trailing a full point behind Capablanca, whom he was desperately trying to catch. His last chance to fight for tournament victory was to beat the leader - Garry Kasparov, ChessBase's Mega database.

The young Cuban, who was confidently leading the tournament, needed only not to lose with Black against the current world champion in order to claim overall tournament victory - Vladimir Tukmakov in Modern Chess Preparation, New In Chess 2012.

Capablanca wanted a draw, because he was Black and because a half point would virtually clinch first prize, Réti said - Andrew Soltis in Why Lasker Matters, Batsford 2005.

What Réti actually wrote was: In Capablanca's remarkably cautious playing in this game it is easy to see that, owing to his favourable standing in the tournament, he has determined to play only for a draw - Masters Of The Chessboard, Dover 1976 reprint of the first English edition of 1932.

There is much more along these lines on the internet, where people seem prone to confuse Capablanca's standing at the start of the finals, where he was 1.5pts ahead of Lasker from the preliminary rounds, with his position when the two met in the finals with four rounds to go.
The truth is that when Lasker played Capablanca in this famous game, they were joint-first on 11pts.
However, it is fair to say Capablanca was still favoured by many to win the tournament.
The reason has to do with the unusual format at St Petersburg.
It began in the preliminaries with 11 players, the favourites being generally acknowledged as the world champion (Lasker), the fast-rising Capablanca, and Akiba Rubinstein, arguably the strongest player never to have played for the world title.
Five players would qualify for the finals, but they were not to include Rubinstein. Instead they consisted of Capablanca (unbeaten on 8pts), Lasker and Tarrasch (6.5pts), and Alekhine and Marshall (6pts).
Whether these famous five were dubbed grandmasters by Tsar Nicholas II is extremely doubtful, but at any event they would compete in a double-round-robin, bringing forward their scores from the preliminaries.
Because there were five players in the finals, one in every round was given a no-point bye.
By the time they reached round seven, where Lasker had the white pieces against Capablanca, the latter had already had his two byes, while the world champion was due one in the following round.
This meant that after their game, Capablanca had three more games (White against Tarrasch, Black against Marshall and White against Alekhine). Lasker had just two more games (Black against Tarrasch and White against Marshall).
I am sure I will not be spoiling it for anyone by stating that Lasker beat Capablanca. This gave him 12pts to the Cuban's 11pts.
The next day, in round eight, while Lasker sat it out, Capablanca went down to Tarrasch, remaining a point behind Lasker, and now having played an equal number of games.
But the drama was not over. In round nine, Lasker was held to a draw by Tarrasch, while Capablanca beat Marshall, setting up a dramatic last round.
Capablanca duly beat Alekhine to reach 13pts, but Lasker also despatched Marshall, winning the tournament with 13.5pts.
Here is the game about which so much has been written.
Lasker - Capablanca
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6
Kasparov: "(!) A very surprising choice. The Exchange Variation of the Ruy Lopez was a dangerous weapon in Lasker's hands. But nobody in the audience and amongst the participants believed that this quiet opening would work against Capablanca, whose excellent technique was already widely recognised. With the charming self-confidence of youth, José Raoul unfortunately shared this misconception and did not recognise Lasker's real intentions."
Soltis: "Tarrasch said that when the game was adjourned for a meal break, he asked Lasker why he chose 4.Bxc6. Lasker replied that he had studied Tarrasch's new idea in the Open Defence and couldn't find an improvement for White. Lasker feared that Capablanca would use the same opening. But this sounds like another Lasker smokescreen. Capablanca never played the Open Defence in his career, and Lasker often played the Exchange Variation without a special reason."
4...dxc6 5.d4 exd4 6.Qxd4 Qxd4 7.Nxd4
Kasparov: "Now even the queens are off the board. Is this the way to play for a win in the decisive game?"
Lasker in Lasker's Manual Of Chess (Dover 1960 reprint of the original 1947 David McKay Company edition): "Black must not refuse this simplification, otherwise he loses too much space."
7...Bd6
Capablanca in Chess Fundamentals (Bell 1973 reset reprint of original 1921 edition): "Black's idea is to castle on the kingside. His reason is that the king ought to remain on the weaker side to oppose later the advance of White's pawns."
Réti: "The bishop is very well-posted here. That is, if White succeeds in exchanging it, in order to deprive the second player of the weapon furnished by the two bishops, then, after the pawn recaptures on d6, Black's pawn-position will also be improved."
8.Nc3 Ne7 9.0-0
Reinfeld & Fine in Lasker's Greatest Games 1889-1914 (Dover 1965 reprint of the original 1935 The Black Knight Press edition entitled Dr. Lasker's Chess Career, Part I: 1889-1914): "Unusual but good: the king is to support the advance of the kingside pawns."
I played the more popular 9.Be3, and later castled queenside, in a win over a junior rated 1744/150 at Hastings 2019-20, but as I noted in part three of this series, Lasker generally kept his king on the kingside in 5.d4 lines of the Spanish Exchange, although often preferring long-castling if he had played 5.Nc3.
9...0-0
Reinfeld & Fine: "Also unusual, but this time less good. Black should castle queenside in order to guard his weak pawns."
Réti: "In a later game, Schlechter played at this point against [me] the much better move ...Bd7, combined with queenside castling [Vienna Trebitsch Memorial 1914, 0-1 39 moves]."
The text is the most-popular move, from a small sample, in ChessBase's Mega20, and was played four years ago by 2509-rated Nikita Petrov in a draw against Yuri Korsunsky (2411).
10.f4
Capablanca: "This move I considered weak at the time, and I do still. It leaves the e pawn weak, unless it advances to e5, and it also makes possible for Black to pin the knight by ...Bc5."
Reinfeld & Fine: "Having the majority of pawns on the kingside, Lasker immediately sets out to utilise this advantage."
10...Re8
Capablanca: "Best. It threatens ...Bc5, Be3 Nd5. It also prevents Be3 because of ...Nd5 or ...Nf5."
Reinfeld & Fine: "Superior to the text was 10...f5 11.e5 Bc5 12.Be3 Bxd4! 13.Bxd4 b6 [Korunsky - Petrov, EU-Cup Novi Sad 2016, saw 13...Rfd8 14.Bf2 Ng6, with Black later successfully blockading White's passer] 14.Rad1 c5 15.Be3 Be6, and in view of the bishops of opposite colour and Black's initiative on the queenside, the position is about even."
Soltis gives the text an exclamation mark, stating that it "threatens to seize an edge with 11...Bc5 12.Be3 Nd5!"
Réti: "A more vigorous move would be ...Bc5, which Lasker prevents with his following move, which is excellent."
Kasparov: "Later Dr Tarrasch suggested a better line: 10...f5 11.e5 Bc5 12.Be3 Bxd4 13.Bxd4 b6, and despite White's strong passed pawn, Black has enough defensive resources. So strong was the impression of Lasker's original plan that the commentators tried to improve Black's play at the earliest possible stage! But Capablanca was right in his assessment: Black had little to worry about."
For what it is worth, Stockfish10 and Komodo10 agree with Capablanca and Soltis.
11.Nb3 f6
Lasker (commenting generally on ...f6 in the Spanish Exchange rather than on this exact position): "The move ...f6, ordinarily weak becomes very effective after the exchange of the hostile king's bishop. This observation is due to Steinitz. Bernstein has applied it happily in recommending against 5.Nc3 the defence 5...f6 in this Exchange Variation."
Réti: "An absolutely unnecessary defensive move, for White's e5 would be of advantage only to Black, since he would have the points d5 and f5 free for his pieces."
Soltis: "Before this game, the move ...f6 was considered good for Black in the Exchange Variation, 'even necessary' said [Russian master Samuil] Vainshtein. After the game, annotators dismissed ...f6 as questionable because 'it makes [the move] f5 stronger'. We [have] got so much smarter over the years that when ...f6 is played, it's taken for granted that f5 will be strong."
Reinfeld & Fine: "Preventing e5 but weakening e6. Preferable was 11...Be6 and if 12.e5 [then] 12...Bb4 with good chances."
Capablanca: "Preparatory to ...b6, followed by ...c5 and ...Bb7 in conjunction with ...Ng6, which would put White in great difficulties to meet the combined attack against the two centre pawns."
White to make his famous 12th move
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12.f5!?
Kasparov awards this an exclamation mark, stating: "Under the classical rules of the Steinitz positional school this move has to be damned. White gets a weak pawn on e4, Black a stronghold on e5, with a devaluation of White's pawn-advantage on the kingside -- too many negative points for just one move. But Lasker's eagle eye had seen much further."
Capablanca: "It has been wrongly claimed that this wins the game, but I would like nothing better than to have such a position again. It required several mistakes on my part finally to obtain a lost position."
Tukmakov awards an exclamation mark, with the laconic note: "12.Be3 Nd5!"
Reinfeld & Fine also give an exclamation mark, stating: "A surprising and courageous move which gives White a definite advantage. The move creates a hole for Black's pieces at e5, but it helps White in three ways: 1) it fixes Black's f pawn, enabling White to undertake a kingside attack with g4-g5; 2) it contains Black's queen's bishop; 3) it will later enable White to plant a knight at e6. The fact that Lasker was able to carry out every one of these objectives, shows that Capablanca did not properly grasp the essentials of the position."
Soltis: "Tarrasch had ridiculed f5 when it occurred in a similar position … but Tarrasch's knee-jerk classicism had been proven wrong when Lasker won [against Salwe five years earlier at St Petersburg 1909] and the f5 idea had worked reasonably well in other previous games."
Réti: "A surprising move. On closer examination, however, it is perceived that … apparent disadvantages go hand in hand with less apparent but actually more important advantages."
12...b6
Kasparov: "12...Bd7 13.Bf4 Rad8 was recommended by stern post-mortem analysts. But obviously the bishop is better placed on b7, where it attacks the pawn on e4."
Reinfeld & Fine: "A wiser continuation was 12...Bd7 and if 13.Bf4 [then] 13...Bxf4 14.Rxf4 Rad8 15.Rd1 Bc8 and White will find it difficult to press home his advantage."
Soltis: "From this point on the annotators looked for a way to save Black's position - a remarkable admission of the strength of 12.f5."
Réti: "Because Capablanca hits on the unfortunate idea of withdrawing his queen's bishop from the defence of the point e6, that point becomes much weaker than e5 is for White. The simplest alternative is probably the development ...Bd7, combined with ...Rad8."
Tukmakov gives 12...Bd7 13.Bf4 Rad8 without comment.
13.Bf4 Bb7
Kasparov gives this move a question mark, commenting: "Now a serious mistake! In general Black should be happy to undouble his c-pawns, but here the pawn on d6 will become a permanent weakness."
Capablanca: "Played against my better judgment. The right move of course was 13...Bxf4."
Soltis also awards a question mark, saying Capablanca's suggestion has been "analysed well into a minor-piece ending."
Réti says Black was "absolutely forced to exchange."
14.Bxd6
Reinfeld & Fine: "Good: now Black has a new weakness at d6."
Soltis gives the move an exclamation mark, stating: "White makes the d pawn the board's only real target."
14...cxd6 15.Nd4
Capablanca: "It is a curious but true fact that I did not see this move when I played 13...Bb7."
15...Rad8
Capablanca: "The game is yet far from lost, as against the entry of the knight, Black can later on play ...c5, followed by ...d5."
Kasparov gives the move a question mark, stating: "Capablanca doesn't take White's plan seriously. The knight on e6 will be a bone in the throat. So 15...Bc8 was obligatory. Maybe the Cuban was too proud to recognise his mistake so soon."
Reinfeld & Fine also award a question mark: "After this he will never be able to drive White's knight from e6."
Soltis says White's advantage is not great after 15...Bc8 "but it is enough to play for a win."
16.Ne6 Rd7 17.Rad1
Capablanca: "I now was on the point of playing ...c5, to be followed by ...d5, which I thought would give me a draw, but suddenly I became ambitious and thought I could play 17...Nc8 and later on sacrifice the exchange for the knight at e6, winning a pawn for it, and leaving White's e pawn still weaker."
Soltis says White would be much better after 17...c5 18.Nd5 Bxd5 19.exd5 b5 20.g4! with a kingside attack.
Reinfeld & Fine say 17...c5 18.Bf2, followed by Rfd2, "would practically stalemate all of Black's pieces."
17...Nc8 18.Rf2 b5
Reinfeld & Fine: "In order to obtain some more room. But the move eventually leads to the opening of the a file, which can only result in White's favour because of his superior mobility. Black's best chance was to give up the exchange."
Unfortunately, the immediate ...Rxe6?, if this is what they meant, fails to the engines' 19.fxe6 Re7 20.e5!, when 20...dxe5? leads to mate after 21.Rd8+ while 20...fxe5 21.Rdf1 Re8 22.Ne4 is not much better, eg 22...d5 23.e7! Nxe7 24.Nd6. That leaves 20...Rxe6, which is met by 21.exd6 Nxd6 22.Rfd2 Nf7 23.Rd7 with a large advantage.
19.Rdf2 Rde7
The engines reckon 19...b4 gives more hope, but much prefer White after 20.Ne2.
20.b4
Reinfeld & Fine: "Stops ...c5 or ...b4."
20...Kf7 21.a3 Ba8
Capablanca: "Had I played ...Rxe6, fxe6 Rxe6, as I intended to do when I went back with the knight to c8, I doubt very much if White would have been able to win the game. At least it would have been extremely difficult."
Kasparov says Capablanca's line "would have given him the best fighting-chances."
Soltis says Black, after the exchange sacrifice, "can establish a semi-fortress, with his king at e7 and knight at c4." He suggest best play runs 23.Rd4 c5! 24.bxc5 dxc5 25.Rd7+ Re7 "followed by ...Nb6." He concludes: "Black is not losing." The engines continue 26.Rd8 Nb6, when Stockfish10 reckons 27.Nd5 Bxd5 28.exd5 Rd7 29.Rb8 Nc4 30.Rc8 is winning, but Komodo10 'only' gives White the upper hand.
22.Kf2 Ra7 23.g4
Réti: "We recognise once more the type of game in which the advantage of controlling more territory is turned to account."
23...h6 24.Rd3 a5 25.h4 axb4 26.axb4 Rae7
Capablanca: "Black, with a bad game, flounders around for a move. It would have been better to play ...Ra3 to keep the open file, and at the same time to threaten to come out with the knight at b6 and c4."
27.Kf3 Rg8 28.Kf4 g6 29.Rg3 g5+
Kasparov: "The last move to be criticised by the annotators. But it's too late for good advice."
30.Kf3 Nb6 31.hxg5 hxg5 32.Rh3!
Kasparov: "32.Rxd6 would have given Black some extra breathing time."
32...Rd7 33.Kg3 Ke8 34.Rdh1 Bb7 35.e5! dxe5 36.Ne4 Nd5 37.N6c5 Bc8
Or, for example, 37...Rdg7 38.Nxb7 Rxb7 39.Nd6+.
The game finished:
38.Nxd7 Bxd7 39.Rh7 Rf8 40.Ra1 Kd8 41.Ra8+ Bc8 42.Nc5 1-0

Tuesday, 21 January 2020

Blunder!

MY second game in today's double-rounder at the Mariánské Lázně 50+ seniors was against a Slovak Fide Master.
The game is too complicated for me to properly annotate it tonight, but here is the critical moment.
White to play and draw in Spanton (1854) - Dusan Mikulas (FM 1969), Round 5
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39.Bc2??
I only saw 39.Qe2 after moving. If Black then swops queens, White is out of any danger. That is why Stockfish10 and Komodo10 slightly prefer 39...Be4, but White is fine after, for example, 40.Bc2 or 40.Bc6.
The game continued:
39...Re7 40.Qf4 Qe1+ 41.Qf1 Rfe8
Black's previously passive rooks have come to life, and White is lost.
42.Ba4?
This makes for a quick finish, but the engines' best line, 42.Qxe1 Rxe1+ 43.Kf2 Rh1 44.Bb3 Rxh2+ 45.Kf1 Rh1+ 46.Kf2 h4 47.gxh4 Rxh4, gives Black a huge advantage.
42...Qe3+ 43.Qf2 Qe4 0-1