Showing posts with label Gambit. Show all posts
Showing posts with label Gambit. Show all posts

Thursday, 5 September 2024

Riviera Round Five

Spanton (1931 ECF/1980 Fide) - Graham Bolt (2035 ECF/1946 Fide)
Scandinavian
1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nb6 5.Nc3 e5!?
How should White respond to this popular gambit?
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6.dxe5!?
This is easily the most popular continuation in ChessBase's 2024 Mega database, but is disliked by Stockfish16.1 and Dragon1. They prefer 6.Nf3, claiming a slight edge for White.
6...Qxd1+ 7.Nxd1 Nc6 8.Nf3
More common in Mega24, and preferred by the engines, is 8.f4!?
8...Be6 9.Ne3 0-0-0 10.Be2 Bb4+ 11.Kf1?
Better is 11.Bd2, giving equality, according to the engines.
11...h6
Black has a large advantage after 11...Nxc4!, the point being White cannot capture twice on c4 because Black has ...Rd1+ etc.
12.a3 Be7 13.Bd2?
13.b4 keeps the game equal, according to the engines.
13...g5!?
Black can play 13...Nxe5!?, but the text is also liked by the engines.
14.Bc3 Na4 15.Rc1 Nxc3 16.Rxc3 g4 17.Ne1 Nxe5
Black has regained the sacrificed pawn, and maintains the bishop-pair
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18.f4?!
The engines strongly prefer 18.Nd3.
18...gxf3 19.Nxf3 Bf6 20.Nxe5 Bxe5 21.Rc2 f5 22.Bf3 c6 23.Nd5!?
This is best, according to the engines, but they still much prefer Black.
23...Bd6 24.b4 Kd7 25.Ne3 f4 26.Nd1 Bf5 27.Rd2 Kc7 28.Nf2 Rhe8 29.c5 Be5 30.Rxd8 Kxd8?!
The engines much prefer 30...Rxd8.
31.Be4?
Even worse is 31.Ne4? Bxe4 32.Bc3 etc, but the engines reckon 31.g4 fxg3 32.hxg3 Bxg3 33.Rxh6 leaves Black with only a slight edge.
31...Bxe4 32.Nxe4 Bc7
This seems better than 32...Bb2?! 33.Nd6.
33.Nd6?!
Hoping the rook-and-pawn ending offers salvation, but the engines prefer 33.Nf6.
33...Bxd6 34.cxd6
How would you judge the endgame?
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Thanks to the weakness of White's queenside pawns, and to Black's lead in development, this is one rook-and-pawn ending that is anything but drawish.
34...Re3 35.Kf2 Rxa3 36.Rd1?!
Probably better is 36.Re1.
The game finished:
36...Ra4 37.Rd4 c5 38.Rxf4 Rxb4 39.Rf6 Ra5 40.Rxh6 a4 41.h4 a3 42.Rh8+ Kd7 43.Ra8 Rxh4 44.Rxa3 Kxd6 45,g3 Rh8 46.Ke3 Rg8 47.Kf4 b5 48.Rd3+ Kc6 49.Ke5 c4 50.Rf3 Kc5 51.Rf5 c3 52.Kf4 Kc4 53.Rf7 Kb3 54.Rc7 b2 55.Ke3 Rd8 0-1

Sunday, 25 September 2022

Ilkley Game Five

Randolph E Donahue (1789) - Spanton (1952)
U2000
Giuoco Piano
1.e4 e5 2.Bc4 Bc5 3.Nf3 Nc6 4.0-0 Nf6 5.d4!?
An interesting gambit that scores a very good 61% for White in ChessBase's 2022 Mega database.
5...Bxd4 6.Nxd4 Nxd4
For a pawn White has the bishop-pair and is able to quickly generate tactical threats
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7.Bg5!?
The mainline runs 7.f4 d6 8.fxe5 dxe5 9.Bg5, slightly favouring Black, according to Stockfish15 and Komodo13.02, which reckon Black's best continuation is 9...Qe7!? After 10.Na3 Be6 (this is the commonest move in Mega22, but better may be the almost-as-popular 10...Rg8!?) 11.c3 Bxc4 12.Bxf6 gxf6 13.Nxc4 Ne6 White's large lead in development, better pawn-structure and safer king at least compensate for being a pawn down.
7...h6 8.Bh4 d6
8...g5 9.f4! seems good for White, eg 9...gxh4 10.fxe5 wins the piece back with a continuing attack, and 9...gxf4, which has been played by at least one grandmaster and is the second-most popular continuation in Mega22, loses to 10.Rxf4! exf4 11.Qxd4 etc. Best may be 9...d5!? 10.exd5 gxh4 11.fxe5 Nxd5 12.Qxd4 Be6, although White is clearly better.
9.f4 b5!?
This may be a novelty. The mainline runs 9...Bg4 10.Bxf6 Bxd1 11.Bxd8 Rxd8 12.Rxd1 Nxc2 13.Nc3 Nxa1 14.Rxa1 with an unclear position, but one that Russian grandmaster Igor Lysyi has had twice as Black in Mega22, losing to a 2347 and drawing with a 2135.
How should White respond?
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10.fxe5
There are many interesting continuations, including 10.Bxb5+ Nxb5 11.fxe5 dxe5 12.Qxd8+ Kxd8 13.Rxf6! Ke8 14.Rc6 f6 15.a4 Nd4 16.Rxc7 and 10.Bxf6 gxf6 11.Bd3 Bd7 12.f5!?, but the text may be as good as any.
10...dxe5 11.Bxf7+?
But this is too optimistic. The engines give 11.Bxb5+ Nxb5, transposing to the first line in the previous note.
11...Kxf7 12.Qh5+ g6
The engines reckon 12...Ke6!? is probably even stronger.
13.Qxe5 g5 14.Nc3
How should Black continue?
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14...Kg6?
14...Be6? loses to 15.Bf2!, according to the engines, eg 15...Nc6 16.Qxb5 Qe8 17.Nd5 Rb8 18.Qc5 Nxe4 19.Bd4+ Kg8 20.Qxc6. But Black seems to be winning after both 14...Re8 and 14...gxh4.
15.Rad1
Slightly better may be the engines' 15.Bf2!?
15...Ng4!
This is the only move that does not lose, according to the engines.
16.Qc5 Qd6 17.Qxd6 cxd6 18.Rxd4 gxh4 19.Rxd6+ Kg7
White only has two pawns for a bishop, but Black has weak pawns and an exposed king
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20.Nxb5
Taking a third pawn, but slightly better, according to the engines, is first 20.h3.
20...Rb8 21.a4 a6 22.Na7?
Better is 22.Nd4, eg 22...Rxb2 23.h3 Ne3 24.Rf4, which Stockfish15 reckons is equal although Komodo13.02 gives Black at least a slight edge..
22...Rxb2 23.Rc6?!
Both 23.h3 Ne3 and 23.Nxc8 Rxc8 are good for Black, but the engines reckon the text is even worse.
Black to play and win
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23...Bb7?
This allows a perpetual, whereas 23...Bd7 24.Rc7 Ne5 solves Black's difficulties and allows a win on material.
24.Rc7+ Kg6 25.Nc6 Bxc6
More-or-less forced as 25...Re8?! 26.Ne7+ gives White a strong attack, eg 26...Kg7 27.Nf5+ Kh8 28.Nd6, when 28...Rb8?! runs into 29.h3 Ne3?! 30.Rff7 etc.
The game finished:
26.Rxc6+ Kg7 27.h3 Ne3 28.Rc7+ Kg6 29.Rc6+ Kg7 ½–½

Saturday, 31 October 2020

'Secret' Gambit Repertoire For White (part six)

SO far I have covered gambit lines in e-pawn openings against 1...c5, 1...e5, 1...e6 and 1...c6.
Now it is the turn of the Scandinavian or Centre-Counter Defence: 1.e4 d5.
My recommendation could not be simpler: 2.d4, and hey presto we have the Blackmar-Diemer Gambit.
Play will usually proceed 2...dxe4 3.Nc3 Nf6 4.f3.
Blacks can refuse to take on e4, but we still have gambit lines against 2...e6 (see part four) and 2...c6 (see part five).
This is not the place to go into the intricacies of the BDG, but note that declining it on move four is much rarer than many people think - two out of three games in ChessBase's 2020 Mega database feature acceptance by 4...exf3.
After 5.Nxf3 blacks play 5...Bg4 slightly more than 46% of the time.
The main line continues 6.h3 Bh5 7.g4 Bg6 8.Ne5.

Position after 8.Ne5
This line still occasionally appears at quite-high levels.
Bob Jansen (2148) - Jan Mikeš (2386)
Prague Summer 2019
8...e6
This is Black's best response, according to the analysis engines Stockfish12 and Komodo11.01. Black is about to lose the bishop-pair, but there is no reason why he should fall behind in development.
9.Qf3!?
Developing with a threat. Stockfish12 prefers 9.Bg2, which was Tartakower's choice back in 1954 (the first time the position appears in Mega20).
9...c6 10.g5 Bh5?
Black seeks to save the bishop-pair, but this natural-looking move is a mistake. The main line runs 10...Nd5 11.Bd3 Nd7 12.Nxg6 hxg6, which the engines reckon favours White after 13.Nxd5 or 13.0-0.
11.Qf2 Nfd7 12.Be2!
Simple but effective. Black cannot capture on e2 because of the mating threat to f7, so ...
12...Bg6
... or 12...Nxe5 13.Bxh5 Ng6 14.Rf1 with a strong attack.
13.Nxg6 hxg6 14.Rf1 Qb6?
Better is 14...f6 15.gxf6 gxf6 16.Qg3 g5 but White has huge compensation for a pawn.
15.Qxf7+ Kd8 16.Bd2!?
This seems even stronger than capturing the e6 or g6 pawn.
16...c5
Black's queen is trapped after 16...Qxb2!? 17.Rb1 Qxc2? 18.Rf3.
The game finished:
17.dxc5 Bxc5 18.Na4 Qc7 19.0-0-0 Bd6 20.Nc3 a6 21.Qxe6 Re8 22.Qxg6 Nc6 23.Nd5 Qb8 26.Bh5 1-0

Tuesday, 27 October 2020

'Secret' Gambit Repertoire For White (part two)

THERE are two well-known gambits White can play on move two against the Sicilian.
Most popular is the Morra Gambit, which starts 1.e4 c5 2.d4 cxd4 3.c3.
This gambit has quite a literature, covering both its accepted form, 3...dxc3, and methods of declining it, chiefly 3...d5, 3...Nf6, 3...d3 and 3...e6.
A Morra gambiteer has to know a lot about the methods of declining the gambit as that is what happens roughly half the time, at least at club level 
The other reasonably well-known anti-Sicilian gambit is the Wing Gambit, which starts 1.e4 c5 2.b4.
This has much less coverage in books, but you can still expect an opponent to have something prepared against it.
Indeed, two of the most-popular anti-Sicilian guides for Black, Joe Gallagher's Beating The Anti-Sicilians (Batsford 1994) and Dorian Rogozenko's Anti-Sicilians: A Guide For Black (Gambit 2003), recommend the same line against the Wing Gambit.
They both suggest playing 1.e4 c5 2.b4 cxb4 3.a3 d5. Gallagher even gives an exclamation mark to 3...d5, which is Black's commonest response to 3.a3 in ChessBase's 2020 Mega database.
What this means is that whites who play either the Morra or the Wing Gambit will quite often, in practice, not get to play a gambit-style game, ie a game in which the opponent has grabbed a pawn.
My recommendation is therefore to follow up 1.e4 c5 with 2.a3.
At first glance this looks like a non-move, or perhaps a sort of trick to get Black to effectively play an English with colours reversed and White having an extra tempo - a tempo that has been used to play a3, which would be ...a6 in a proper English.
But there is rather more to it than that, which is why 2.a3, which first appears in Mega20 in a game from 1943, has been played by the likes of world champion Magnus Carlsen, Shakhriyar Mamedyarov (2764) and Ian Nepomniachtchi (2751).
Strong players who have lost against 2.a3 include Victor Bologan (2640), Ernesto Inarkiev (2689) and Sergei Rublevsky (2649).
Since 2.a3 is not a forcing move, Black has a big choice of replies, but the most popular are 2...Nc6, 2...g6 and 2...e6.
All three have their points. 2...Nc6 and 2...e6 are meant to discourage White from following up 2.a3 with 3.b4, while 2...g6 anticipates 3.b4 by intending to fianchetto the black king's bishop on the a1-h8 diagonal.
I will look at each of Black's three main replies in turn.

Magnus Carlsen (2837) - Ernesto Inarkiev (2689)
World Blitz Championship (Riyadh, Saudi Arabia) 2017
1.e4 c5 2.a3 Nc6 3.b4!?
White insists on playing a gambit. In effect the game will become a sort of Wing Gambit, but one in which most blacks will already be out of book.
3...cxb4 4.axb4
This position was reached by the old-time greats Capablanca and Marshall, but from a Wing Gambit move-order: 1.e4 c5 2.b4 cxb4 3.a3 Nc6 4.axb4. Of course with that move-order the modern black player would probably play the book-recommended 3...d5 rather than 3...Nc6.
4...Nxb4 5.d4!?
Capablanca and Marshall preferred the natural-looking 5.c3. The text does not appear in Mega20 until 1992, but has rapidly overtaken 5.c3 in popularity. The main idea is that White immediately creates a classical centre, while leaving the b4 knight hanging in mid-air. In practice the two lines often transpose.
5...d5
It is normal in this type of position for Black to immediately challenge the establishment of a pawn-duo on d4 and e4. Second in popularity in Mega20 is 5...g6, and if 6.c3 then 6...Na6!?, when the analysis engines Stockfish12 and Komodo11.01 reckon White has more than enough compensation for the pawn-deficit after 7.Bxa6!? or 7.h4. Also interesting is Stockfish12's suggestion 6.Bd2!?, which is not in the database. After 6...Nc6 7.d5 Bg7 8.Bc3 Bxc3+ 9.Nxc3 White has a handy lead in development, and Black must avoid the piece-losing blunder 9...Ne5?? 10.f4.
6.c3 Nc6
How should White proceed?
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7.exd5
Both Capablanca and Marshall preferred 7.e5!?, although then Black gets to develop his light-square bishop at ...Bf5 before playing ...e6, plausibly arguing he has a superior form of French Defence.
7...Qxd5 8.Na3
The knight eyes a possible fork at c7. A handful of games have seen 8.Nf3, half of which were met by 8...e5?!, which looks dubious in light of the engines' suggested novelty 9.Nbd2!?, eg 9...exd4 10.Bc4 Qh5 11.0-0 with dangerous attacking chances for White.
8...Bf5!?
Offering back the pawn while getting on with development.
9.Nb5 Rc8 10.Nxa7 Nxa7
After 10...Ra8 11.Nb5! Black seems to have nothing better than 11...Rc8 (not 11...Rxa1?? 12.Nc7+), which is inferior to the game continuation, according to the engines.
11.Rxa7 e5
Black cannot grab the c pawn, eg 11...Rxc3? 12.Qa4+ Qc6 13.Qxc6+ bxc6 14.Ra8+ Kd7 15.Bd2 and 16.Rxf8. The engines slightly prefer 12...Kd8, but the position is horrible for Black, eg 13.Bd2 Rc7 14.Nf3 with a huge attack for White.
12.Nf3 exd4 13.Nxd4
The engines prefer 13.Qxd4 Nf6 14.Qxd5 Nxd5 15.Bb5+.
13...Bd7 14.Nb5 Qxd1+ 15.Kxd1 Bc6 16.Bd3 Bc5 17.Re1+ Ne7 18.Ba3 Bxa3 19.Rxa3 Rd8 20.Nd4 Kd7!
Inarkiev has successfully negotiated the opening. The position is close to level, but very open and remains tactically sharp.
21.Ra7 Rhe8 22.Kc2 Kc7 23.Rb1 Rb8 24.f3 Nd5?
A tactical oversight. The engines reckon White's edge is small after 24...g6 or 24...Red8.
25.Nxc6 Kxc6 26.Bb5+ Kb6 27.Rxb7+ 1-0
Inarkiev presumably felt there was no need to test Carlsen's technique after 27...Rxb7 28.Bxe8+ Kc7 29.Rxb7+ Kxb7 30.g3.

WindPower (2465) - Ciron (2502)
PAL/CSS Rapid 2008
1.e4 c5 2.a3 e6
Black's alternative way of apparently preventing, or at least discouraging, 3.b4.
3.b4!? cxb4
The actual move-order in this computer game was 1.e4 c5 2.b4 cxb4 3.a3 e6, ie the Sicilian Wing Gambit, but that allows the modern riposte 3...d5. Note that one reason 3...d5 is considered strong is that, after 4.exd5 Qxd5, White does not have 5.Nc3 (and he certainly does not want to enable that move by 5.axb4?? Qe5+).
4.axb4 Bxb4
Once again Black has won a pawn, for which White can take over the centre with tempo and have pressure down the a and b files (somewhat like a reverse Benko Gambit).
5.c3
5.Bb2!? has attracted a fair bit of attention recently. After 5...Nf6 6.e5 Nd5 7.c4 Ne7 (this slightly counter-intuitive move is Black's commonest choice) the position is rather unclear, although Stockfish12 and Komodo11.01 slightly prefer Black. The text is White's traditional plan in the position.
5...Be7
The most solid and easily the most popular reply.
6.d4 d6
Black's Scheveningen-style small centre is common in the Sicilian. The French-style 6...d5 is not very popular, perhaps because the position is reached via a Sicilian, but seems perfectly playable. The normal continuation is 7.e5 Nc6 8.Bd3 when White seems to have a  better-than-usual set-up against the French Defence (apart from being a pawn down!).
7.Bd3 Nf6 8.Ne2!?
This somewhat strange-looking continuation comes to be the choice, at least for a while, of my analysis engines. Slightly more popular, and a lot more successful, at least percentage-wise, in Mega20 is building a big centre with 8.f4.
8...Nc6 9.0-0 0-0 10.Nd2 Qc7
Alessandro Bonafede (2310) - Fabiano Caruana (2709), Italian Championship (Siena) 2010, saw 10...e5!? 11.f4 Bg4 12.d5 Nb8 13.f5 with an unclear position that my engines believe favours Black (but ½–½, 63 moves).
11.h3!?
This seems a little slow. Perhaps 11.f4 is an improvement.
11...b6
Part of a plan to swop off Black's light-square bishop.
12.f4 a5 13.Ba3 Ba6
How should White proceed?
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14.Bxa6!
White does not have time to preserve the bishop, eg 14.Bc2? Bxe2 15.Qxe2 Nxd4 or 14.Bb1?! b5, when Black's a and b pawns are a strength rather than targets.
14...Rxa6 15.c4!?
Is White's centre impressive or vulnerable? The outcome of the game will hinge on this.
15...Rfa8 16.d5 Nb4!?
White is better after 16...Nd8 17.Nd4, according to my analysis engines.
17.Nd4 e5 18.Nb5 Qc8 19.fxe5 dxe5 20.Bb2!?
My analysis engines prefer to get the white king away from checks on the g1-a7 diagonal by playing 20.Kh2.
20...Nd7
Stockfish12 reckons 20...Nb3!? 21.Bc3 Nd7 slightly favours Black, but Komodo11.01 gives White full compensation for the pawn deficit.
21.Qe2 Bg5?!
Stockfish12 gives White a large advantage after this, while Komodo11.01 reckons any edge is small. As we shall see, Stockfish12 is probably right. Both engines agree 21...f6 is a better move, but with the black queenside blockaded, White's long-term central and kingside chances look promising.
22.Nf3 Bf4 23.Kh1 Qc5
Komodo11.01 reckons 23...f6!? 24.Nh4 g6 25.Rad1 is close to being equal, but Stockfish12 has White positionally winning.
24.g3! Bxg3 25.Ng5
Now Komodo11.01 agrees White is much better.
25...Qe7 26.Qg4 h6
If 26...Bf4 then 27.Rxf4! exf4 28.Bxg7! wins, eg 28...f5 29.Qxf5 Qxg7 30.Qe6+ Kf8 31.Rg1 with a winning attack, one line being 31...Rd8 32.Qf5+ Ke7 33.d6+ Kd8 34.Ne6+ Kc8 35.Rxg7.
27.Nxf7 Qh4
This is best, but hopeless, according to my analysis engines.
28.Nxh6+ Qxh6 29.Qxg3
Material is level but Black is busted.
29...a4!?
29...Rf8 avoids the knight fork, but after 30.Rxf8+ Kxf8 31.Rg1 (31.Rf1+ is also strong) Qf6 32.Nc7 Ra7 33.Ne6+ White crashes through.
30.Nc7 Nc2 31.Ra2 Qh7 32.Kh2 1-0
Black is losing at least the exchange, has uncoordinated pieces and the more-vulnerable king.

Andrey Mustafin (2241) - Temur Kuybokarov (aka Igonin) (2498)
Moscow 2016
1.e4 c5 2.a3 g6!?
Instead of trying to deter b4, or at least being in a position to capture twice on the square b4, Black prepares to fianchetto his dark-square bishop to take advantage of the likely opening of the a1-h8 diagonal. This means White will not be playing a gambit - at least early on - and the game is likely to be more positional than tactical.
3.b4 Bg7 4.Nc3
Shakhriyar Mamedyarov, a former 2800+ player who plays 1.e4 c5 2.a3 a lot, has also tried the somewhat awkward-looking 4.c3!?
4...d6
This is Black's most-popular reply. Also common is 4...b6, while Victor Bologan has played 4...Nc6!?
5.Nf3
Slightly more popular is 5.g3, presumably on the ground that White is effectively playing a Closed Sicilian, while Mamedyarov has played 5.Rb1, a common idea in lines where White has met ...Bg7 with Nc3.
5...Nc6 6.Rb1 e6 7.bxc5 dxc5 8.Bc4 Nf6 9.0-0 0-0
White has a central pawn-majority and pressure down the b file, but Black has a powerful dark-square bishop and no exploitable weaknesses. Stockfish12 and Komodo11.01 reckon the position is equal.
10.d3 Ne8 11.Ne2
An obvious alternative is 11.Bb2, but Mustafin is happy to shuffle the knight to the kingside, where he has more space.
11...Nd6 12.Ba2 b6 13.Bg5 Qd7 14.Qc1 Ba6
Setting a little trap.
15.Ng3
Not 15.Bh6? Nxe4!
15...Rfc8 16.Bh6 Bh8 17.Rd1
The engines prefer 17.Qf4!?, which Stockfish12 reckons gives White a small edge but Komodo11.01 evaluates as equal.
17...Nd4 18.c3!?
This comes to be the choice of both engines.
18...Nxf3+ 19.gxf3
White's king's position has been weakened but it is not clear how Black can get at the white king. Meanwhile White maintains a central pawn-majority.
19...Nb7!?
This is Komodo11.01's choice, but Stockfish12 strongly dislikes it. Black's pieces are looking a little bunched on the queenside, while it is easier for White to focus on the kingside, although it is hard to say how significant these factors are.
20.f4 Na5 21.Qe3!?
A bold offer of a pawn.
21...Bxc3!?
Black accepts the challenge, which the engines for quite some time reckon is the right thing to do, but they come to prefer a less-committal move such as 21...Bb7.
22.e5!?
This is the point of Mustafin's idea. Black's dark-square bishop is cut off from its king, but White becomes weak along the h1-a8 diagonal.
22...Bb7 23.Nh5
Even stronger is the engines' 24.Ne4! The point is that if, as in the game, Black replies 23...Qc6, White has 24.Qg3, threatening catastrophe for Black on the kingside dark squares. Black is therefore obliged to go in for 23...Bxe4 24.dxe4 Bd4, but then 25.Qh3 is unclear - Stockfish12 has White almost winning; Komodo11.01 reckons the game is equal.
23...Qc6 24.Nf6+ Kh8 25.Ne4 f5! 26.exf6 Bxf6
Black's dark-square bishop returns to the kingside, greatly increasing his defensive resources.
27.Kf1?!
This defensive move - it gets rid of Black's mating threats at g2 and h1 - seems too slow. The engines reckon 27.h4! is much less clear, not least because 27...Bxh4? runs into 28.Qh3 Be7 29.Bxe6.
27...Bd4 28.Qh3 c4?!
Simpler is the engines' safety-first 28...Rc7.
29.Ng5?!
Setting a trap, but almost certainly objectively better is the engines' 29.Rb4.
29...cxd3??
The move ...Rc7 is still good for Black.
White to play and win
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30.Bg7+! Kxg7
White mates immediately after 30...Bxg7 with 31.Qxh7#.
31.Qxh7+ 1-0

Monday, 26 October 2020

'Secret' Gambit Repertoire For White

IN this series I will recommend gambit lines for White against Black's most-popular replies to 1.e4.
Gambits are fun to play, put immediate pressure on an opponent and teach important lessons about time-versus-material.
They also tend to be most effective in games between players below master level, ie the vast majority of chess games.
The 'secret' part of the repertoire is that I will be doing my best to avoid the obvious and well-known, for example the King's Gambit against 1...e5 and the Morra Gambit against 1...c5.
Indeed, several of the gambits I will cover are very unlikely to appear in the libraries of even the most ardent chess bibliophile.
That means I, and you if you start playing some of these lines, will be creating opening theory as you go along. Your opponents, with any luck, will be even more in the dark.
The series starts properly tomorrow with a little-known gambit against the Sicilian.

Wednesday, 6 February 2019

Capablanca's Anti-Gambit Weapon

TURNED out for Battersea in division one of the London League against Wimbledon last night.
Ian Heppell (182) - Spanton (171)
Göring Gambit
1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 d5
George Botterill in Open Gambits (Batsford, 1986) stated: "Although it is really stronger to accept the gambit, over the board the gambit is declined more often than not, which is quite understandable if Black has not come fully prepared for all the complicated tactical play that may result from acceptance."
One problem with 4...dxc3 is that White has two almost equally popular replies in 5.Nxc3 and 5.Bc4, with both moves scoring more than 60% in ChessBase's 2019 Mega database.
A repertoire book recommending acceptance is Larry Kaufman's The Chess Advantage In Black And White (McKay, 2004). He wrote: "Black can equalise by 4...d5, but I think he should try for more. Like its cousins the Morra Gambit and the Blackmar-Diemer Gambit, the Göring Gambit does not give White enough lead in development to fully offset the pawn sacrificed. That's why these gambits are almost never played by top grandmasters."
Perhaps he should have added "in modern times," because the list of strong players who have essayed 4.c3 includes Staunton, Paulsen, Blackburne, Anderssen, Tarrasch, Nimzowitsch, Lasker, Reti, Schlechter, Tal, Stein, Bronstein, Spassky, Ribli and Ljubojevic. The list since Kaufman's book was published is rather less impressive but includes several 2500+ players.
In a more recent repertoire book, Bologan's Black Weapons In The Open Games (New In Chess, 2014), Viktor Bologan rejects 4...dxc3, writing: "I was very interested in capturing the pawn (and another if White continues with 5.Bc4). However, I wasn't able to find any advantage for Black in one sideline."
It should be noted that as well as 4...d5, Black has two other important ways of declining the gambit, viz 4...d3 and 4...Nf6.
5.exd5 Qxd5 6.cxd4 Bg4 7.Be2 Bb4+ 8.Nc3 Bxf3
First played, as far as is known, by Capablanca against Marshall at Lake Hopatcong, 1926. The idea soon becomes clear.
9.Bxf3 Qc4
Preventing early castling by White.
How should White react?
10.Bxc6+
Marshall preferred 10.Be3, when Capablanca grabbed a pawn after all by 10...Bxc3+ 11.bxc3 Qxc3+. The game was quickly drawn after the further moves: 12.Kf1 Qc4+ 13.Kg1 Nge7 14.Rc1 Qxa2 15.Ra1 Qc4 16.Rc1.
Much more popular than 10.Be3 is to seek an immediate queen-exchange by 10.Qb3, but the text is most popular.
10...bxc6
Blacks originally played 10...Qxc6, but Bologan says "it very quickly became clear the blockade of the d5 square is worth doubling the c pawns."
11.Qe2+ Qxe2+ 12.Kxe2 0-0-0 13.Be3 Ne7
Bologan writes: "It's easier for White than for Black to lose this position. Why is this so? Mostly because White (often) fails to play his main trump - installing his king on c4."
14.Kd3
IH in the postmortem said this is recommended in a book he has, although he could not recall the title. Judging from Bologan's comments, the book is probably Danish Dynamite. Even so, 14.Kd3 is only fourth-most popular in Mega19.
IH said his only loss with the text came against grandmaster Oleg Korneev, and that was due to a blunder late-on.
14...Bxc3!?
This seems to be a novelty.
Bologan says 14...c5 must be played "if (Black) wants to equalise in a relaxed manner." However, my move also seems satisfactory.
15.bxc3
15.Kxc3 Nd5+ gives the knight a fine central outpost.
15...c5 16.Kc4 cxd4 17.Bxd4 Nc6
Protecting the a7 pawn as the g7 pawn is effectively taboo.
18.Rhe1
Not 18.Bxg7? as Rhg8 leaves the bishop without a useful square, eg 19.Bf6 Rd6 20.Bd4 (20.Bh4?? Rg4+) Nxd4 21.cxd4 Rxg2 with much the better game for Black.
IH regretted not playing 18.Be3, which at least keeps the game going.
18...Nxd4 19.cxd4 Rhe8 20.Rad1 ½–½
Updated statistics
Battersea 2018-19
Event...Colour...Grade...Opponent's Grade...Result
CLL.........B..........167...….........196..............…D
LL...…….B...…...167...………..159...………….D
CLL...…..B...…...167...………..161...………….W
CLL...…..B...…...167...………..190...………….D
LL...…….W...…..167...………..161...….………W
CLL...…..W...…..167...………..148...………….D
CLL...…..W...…..167...………..165...………….W
CLL...…..W...…..167...………..160...………….D
CLL...…..W...…..167...………..159...………….D
LL...…….B...…...167...………..168...………….D
LL...…….W...…..171...………..159...………….W
CLL...…..B...…...171...………..198...……….….L
CLL...…..B...…...171...………..169...…………..L
CLL...…..B...…...171...………..196...…………..L
LL...…….B...…...171...………..182...…………..D
Overall this season for Battersea I have scored +4=8-3 for a grading performance of 175.
In season 2017-18 I scored +10=8-9, also for a grading performance of 175.