Kenilworth Kibitzer

A blog for members of the Kenilworth Chess Club.

Monday, November 29, 2010

 

A Bust to the Caro-Kann: Kingside Castling, Part 2




Now for the 3rd out of 4 digressions into C-K theory - in part 4 we'll look at the modern 7....Nf6, but for now we'll stick with the main line and examine the consequences of an early ...Qa5+/...Bb4+, which have been tried as an improvement for Black.

Starting as always with the key position after 10. QxB:

now after...
10..... e6
11. Bf4 Bb4+!? is possible, on the premise that a c2-c3 advance is not in White's favor since it provides a lever for Black in a later pawn attack. And if White plays an eventual c3-c4 then the tempo that was 'sacrificed' is regained. And so,
12. c3 Be7 leaves White a choice - in the stem game Karpov-Larsen 1982 White chose the natural 13. Ne4 aimed at d6, but Larsen chose the surprising 13. .... Ngf6! when 14. Nd6+ BxN 15. BxB Qa5 left White with castling problems, though White did manage to win all the same.

More often is played 13. O-O-O when ....Ngf6 14. Kb1 a5 15. Ne5 leads to a slight edge for White - he does best to reserve c3-c4 for a later time.

More testing is:
11. Bf4 Qa5+
12. Bd2 Bb4 (12. c3 is not well regarded as the Black Queen is well posted on a5)
13. c3 Be7
14. c4 Qc7 (the persistent 14....Bb4 is not well regarded since after 15. Ne4 Black is under pressure to exchange into an unfavorable endgame)
15. O-O-O Ngf6

and now Black has induced c2-c3-c4 without apparent loss of tempo, he has the added move Qc7. However, this variation is strategically complex because the position of Black's queen is not always beneficial nor is the pawn on c4 always a burden. It sharpens the game, as Black's queenside breaks (c7-c5 or b7-b5, even a7-a5) get more bite, but White has more play in the center.

White has several options at move 16, I won't beat all of them to death, but here are a couple:
16. Ne4 O-O
17. NxN+ NxN
18. g4!? Nxg4 (note the thematic pawn sacrifice)
19. Rhg1 f5
with mixed results - this line is essentially identical to the early c4 lines in the last post where Black also has the sharp option of 16. .... b5!? when White often responds with 17. c5 and the game resembles Ivanchuk-Seirawan 1990 posted earlier.
In one notable game White even skipped 17. NxN+ and went for the immediate 17. g4?!?, and arrived in the following position in Bacrot-Leko 2008:
White to move....why so serious?

16. Qe2 O-O (16. Qe2 is an exceptionally tricky move that looks to take advantage of the weakness of Black's e-file - think of g2-g4 followed by Nxg4, Rhg1 f5, Qxe6+; also, a knight sacrifice on f5 is threatened because the bishop on e7 is undefended)
17. Kb1 Rfe8
18. Ne5 c5!?
19. Bf4 With a tiny edge to white who has placed his pieces well but his king is more exposed

16. Kb1 O-O as in other variations a quick Kb1 has become the vogue at the top level. Why? Flexibility - White can play on either the d-file, c-file, or g-file, and waits for Black's response. However, this is not the most critical move.
17. Ne4 Rad8
18. NxN+ Nxf6
19. g4!? follows the heavyweight matchup Carlsen-Kamsky 2008 which ended in a draw.

Another popular choice is 16. Rde1/Rhe1, putting pressure on e6/e7. Lots of choices! The theoretical debate is still going as can be seen from the recent games.


However, recently there's also been fights around a line that tries to underline a unique weakness in Black's approach - after
12. Bd2 Bb4
13. Ne4!? Pointing to the hole on d6 and giving Black the choice of either a slightly inferior endgame after exchanges on d2 or....
13. .... Ngf6!
14. Nd6+ Ke7
and it transpires that Black can get away with this audacious play because White will have difficulty mounting a strong attack against the Black king. White can 'win' a pawn with
15. Nxb7 Bxd2+
16. Nxd2 Qb4!
17. Qa3 QxQ
18. PxQ but it is difficult for White to make something of the extra pawn (although for Black to win is nearly impossible)

Alternatively the main line has become:
15. Nc4 Bxd2+
16. Nfxd2 Qc7
17. O-O-O Rhd8

where White has a slight edge because of his space advantage.

Conclusion: 11. .... Qa5+ is a topical line that is growing in theory, and is an interesting alternative for Black. However, White has many options to choose from in fighting it, and seems to be able to draw at will if he is so inclined. Meanwhile the sharp c4 lines are still scoring wins for White.

Friday, November 26, 2010

 

A Bust to the Caro-Kann: Kingside Castling, Part 1


Now we come to the key variations in the modern game, where the Caro-Kann starts to resemble a Sicilian Defense with opposite side castling and pawn storms. In what Kasparov terms 'Larsen's revolution', it became clear that kingside castling was indeed possible for Black and may, in fact, provide him with more resources.
Starting from our main position after 10. Qxd3:



Kasparov notes that now:

Black most often plays 10....e6 and if 11. f4 - ...Ngf6 and ...Be7, completely rejecting the classical ideology of the variation, which was based on the following dogmas:
1) it is essential to play ...O-O-O, since on the kingside Black is castling into an attack
2) therefore ...Qc7 is essential, since otherwise the white bishop will occupy f4, which with queenside castling is dangerous
3) after completing his development, Black frees his game with ...c6-c5: he simply does not have any other plan.
Today, however, castling on opposite sides has become the norm, since Black has arrived at a new understanding: kingside castling is by no means an act of suicide!
We will see that this is true, yet all the same White has a variety of ways to put pressure on Black's position, ranging from sacrifical attacks to early endgames. The resulting positions are rich with possibilities. In part 2 we will look at non-cla
ssical variations with early ...Qa5+
and/or ....Bb4+ with kingside castling, but in part 1 we will see the main line:
10. .... e6
11. Bf4 Ngf6
12. O-O-O Be7
(12.... Nd5 13. Bd2 Nb4!? 14. Qb3 a5 15. Ne4 a4 16. Qa3! is rated as better for White, 15. Kb1 a4 16. Qe3 was also seen in Leko-Dreev 2002)

And now White has choices depending on stylistic preferences - 13. Kb1, 13. c4 and 13. Ne5.
We'll start with 13. Ne5, which was first thought to be critical and logically follows from Bf4. No discussion should avoid the amusing game Beliavsky-Larsen 1981:
Behold the pale horse. The man who sat on him was Death...and hell followed with him.

This game asks the question - what if Black 'passes' for two moves?
13. Ne5 a5
14. Rhe1 a4? ('Larsen
is doing a wonderful impression of a beginner' - Gallagher)
15. Ng6! Nd5 (White even wins after ...fxg6 16. Qxg6+ Kf8 17. Rxe6 Qe8 18. Rde1!)
16. Nf5!! and White won in a further seven moves (see link above, it's fun to work through the variations)
Death rides a pale horse

This game demonstrates a key feature of kingside castling for Black - both sides must always consider the consequences of White dropping knights on f7, g6, or f5. These strategic risks do not exist in queenside castling lines.

However, after the unambitious 13. ... O-O it seems as though White has some trouble maintaining a meaningful initiative against good play from Black. For example the natural looking 14. Ne4 Nxe4 15. Qxe4 Nxe5 16. Bxe5 Qd5 already gives Black equality and White even lost the well known game DeFirmian-Korchnoi 1989 from this position. Why is this? 13. Ne5 is a dangerous looking move but does not slow Black's development or (against good play) meaningfully advance White's attack as the f7/g6/e7 squares are adequately covered.

13. c4 is another bold method to try to refute kingside castling. This highlights the absence of a Black rook from the d-file amongst other things - d4-d5 is one plan. Also, for once White does not simply allow Black use of the d5 square. But Black, ever inventive, notices a drawback...
13. .... b5!? (I would like my d5 square back please)

14. c5! O-O now follows Ivanchuck-Seirawan 1990 (see link for Seirawan's own analysis) - Black has the d5 square but White has, importantly, closed off files on the queenside and maintains his space advantage.
15. Kb1 a5
16. Bc1 a4 with complicated play. An interesting follow-up to this game was Ivanchuk-Korchnoi 1993, where after ...a7-a5-a4, Korchnoi preferred to castle...queenside!
Black can avoid the committing 13 ... b5!? and prefer 13. ... O-O when the lines can transpose to other options described here. However, if not challenged White does best not to commit to piece exchanges and instead try to find ideal placements for his knights and initiate his kingside attack.
The more indirect 13. Kb1 in combination with 14. Ne4 has become popular at the GM level, although this is not to everyone's tastes - the main line leads to a quick endgame:

13. Kb1 O-O
14. Ne4 NxN
15. QxN Nf6
16. Qe2 Qd5!?
(combines centralization with an attack on h5)
17. Ne5 Qe4
18. QxQ NxQ

A critical position (!?)

In this dry-looking position it turns out there are interesting tactical resources that give White a chance for an edge. For example, after 19. Rhe1! Nf6 (...Nxf2? 20. Rd2 Bh4 21. Ree2! and Black is embarrassed by his wandering knight) 20. g4!? and the endgame was executed to perfection by White in the stem game Kasparov-Anand 2003.
White also has the choice of a different and slightly favorable endgame after 19. Be3!? when the ...c5 break has been momentarily suppressed.
Key source games include Stefansson-S Kasparov 2001 and Kramnik-Bareev 2003.


However, if Black is not in the mood to defend a grueling endgame then more interesting play arises from 13. Kb1 O-O 14. Ne4 Qa5!?

Again Black targets the h5 pawn, a logical response to removing the knight from g3. However, now White can try a thematic and dangerous pawn sacrifice:
15. g4!? Nxg4
16. Ne5! Ndxe5!
17. dxe5 Rad8
18. Qh3! and this follows Motylev-Willemze 2003 where White converted his attack ultimately into a win, albeit in an endgame.

The fireworks were truly on display in Polgar-Anand 2003, where Anand came up with a shocking novelty in a related line, and Polgar managed to draw only with difficulty.

Conclusion: Kingside castling for Black carries strategic risks, but it is clearly not nearly as risky as was once thought - indeed the main line goes straight to an endgame. However, a patient player from the White side can either take their chances with the slight edge given to them there, or go for more entertaining fare, particularly 13. c4 where the verdict is unclear. It's not easy, but the 'Kann is all about pain tolerance, time to hit the gym and bulk up.


Sunday, November 21, 2010

 

A Bust to the Caro-Kann: Black castles queenside


Now it's time to get into some ugly theory. For reference, I'm working off of Gallagher's Starting Out: The Caro-Kann, McDonald's Main Line Caro-Kann, Jovanka Houska's Play the Caro-Kann, and Kasparov's On Modern Chess Part 1: Revolution in the 70's, as well as recent games from This Week in Chess.

This time we'll take a look at Black choosing (or feinting?) to castle queenside. This was originally not only most popular but essentially thought to be forced, as castling kingside was thought to be suicide. Bent Larsen, the tireless pioneer, has changed the evaluation entirely and now kingside castling is thought to give Black the best dynamic chances. Nonetheless, queenside castling is still popular at the amateur level as Black's defenses look very solid. To prove otherwise White must play with some verve.

Starting from our earlier position after 10. QxB:

Black is going to follow with the moves ...e6, ...Ngf6, ...Qc7 and then potentially ....O-O-O. Order doesn't matter much but note that castling is saved for last on first principles of maintaining flexibility - as we'll see he may change his mind.
10. .... Qc7 (note that ...e6 or ...Ngf6 can be met with 11. Bf4, but after ....Qa5+ 12. Bd2 Qc7 Black transposes back to the main line. 12. c3 is thought not to be best because the queen is well posted on a5 and Black can castle kingside safely).
11. Bd2 Ngf6
12. O-O-O e6

And now White has two critical choices - 13. Qe2 and 13. Ne4, with different underlying strategies...
13. Qe2!?
A concept first developed by Spassky and good enough to give him his first win in his 1966 world championship match versus Petrosian. The idea is simply to place a powerful knight on e5 as quickly as possible.

Spassky patiently explains the first bust to the Caro-Kann
13. ..... O-O-O
14. Ne5 Nb6 (..c5!? will be examined below; ...Nxe5 leads to a pawn formation that is typically poor for Black in either the middlegame or endgame).

A good move which attacks d4, defends f7, and prepares a knight jump to d5.
15. Ba5 Rd5 (15. c4!? is a dangerous gambit, meanwhile after 15. Ba5 c5?! 16. Rh4! Black faces possible problems with a rook bearing on the c-file skewering the queen after 16..... cxd 17. Rdxd4!)
16. BxN axB (16. b4 is exceptionally dangerous after the exchange sac ...Rxa5!)
17. c4 Rd8 (17....Ra5!? is also possible though risky with complications that are analyzed for a further 10 moves in Kasparov's excellent book)
Source games that expand on the position after 17 ....Rd8 include Spassky-Pomar 1968 and Mecking-Pomar 1968, where it was thought that Black had enough resources to hang on for a draw. However, in the modern treatment White does not exchange pieces as early is in the above games, and Black is getting hammered in both 17...Rd8 and 17...Ra5 (65% score for White).

Conclusion: After Spassky's 13. Qe2, 13... O-O-O is virtually busted.

13. .... c5!?

The key move, which required proof that castling kingside can be OK for Black in the Caro-Kann to be discovered. This is where flexibility pays - Black sees 13. Qe2 and decides to change plans, instead asking the question of why Qe2 is a good move?
14. Rh4!? Be7 (note the Rh4 maneuver again)
15. PxP NxP
16. Rd4 O-O
17. Bf4 Qa5
follows Karpov-Hort 1973 which was drawn 3 moves later.
Later Black began to play more ambitiously with 14....Rc8!, when his attack is more advanced than White's even though the Black king is still in the middle. White is not doing as well here in recent games, and 13. Qe2 has taken a back seat to a new concept....

13. Ne4! O-O-O (now ....c5 is just bad after 14. NxN+ NxN 15. Qb5+)
14. g3!
This move was Geller's novel conception - the simple but effective idea is to put the bishop on f4 and knights (if allowed) on e5 or even d6. The resulting line is the modern main line. Notice, incidentally, how Ne4 has reactivated White's worst placed piece. It may seem that this allows Black freeing exchanges, but watch how each of White's remaining pieces arrive at ideal squares before Black's.
14. .... Nxe4 (14.... Nc5 looks cute but after 15. NxN BxN 16. c4! Bd6 17. Bc3 Kb8 18. Qe2 and 19. Ne5 it seems White is having all the fun and is scoring better than 62% recently)
15. Qxe4 Nf6 (an important moment - the knight can also stay on d7, but this allows a strong line from White involving c2-c4 and d4-d5. See Frolov-Volzhin 2000 for details - although the game ends well for Black the opening looks strong for White. Though oddly Gallagher and McDonald come to opposite conclusions on the very same game.)
16. Qe2 Bd6 (16. ...c5!? 17. PxP Bxc5 18. Rh4! was part of a famous bust, Tal-Hubner 1979)
17. c4 c5!? (Black waits for the c4 square to be occupied before trying this)
18. Bc3 cxd4
19. Nxd4 a6 (preventing Nb5)
20. Kb1 Rd7
And the battleground has been set for a late middlegame where White looks to play on the c-file and the strongpoint on e5 after, say Nf3-e5 and Rc1. Meanwhile Black looks to play on the d-file. Notice how the pawn on g3 blunts Black's bishop, while the queen on e2 is perfectly placed to defend c4 and h5. White has been doing well here - scoring 60% by my database.

Conclusion: Black is under some pressure in Queenside castling lines. The line is a refuge for endgame sadists. But as the cop told the Joker in Dark Knight, 'I know you're going to enjoy this. I'm just going to have to try to enjoy it even more.'

I'll cut off discussion here because 1. I have a day job and 2. If you ever reach this position, you know you are and are most likely playing a master/Caro-Kann fanatic as you are now 20 moves into theory. That said, I find theory in the mainline Caro-Kann flows like water...one move flows seamlessly into the next....
Next time: kingside castling, the modern way.




Saturday, November 20, 2010

 

A Bust to the Caro-Kann



The Caro-Kann is a venerable defense to 1. e4 with history dating back to 1886, when Horatio Caro and Marcus Kann jointly analyzed the inauspicious looking 1....c6. Nowadays the Caro-Kann is favored by gray-haired ex-Soviets with a high tolerance for pain. There are several principled variations White can choose from against the 'Kann, so players from the Black side have to be prepared for any of them. Not necessarily different from other openings in that respect, but the 'Kann more than others is built on defensive rather than counterattacking principles, and favors the player who is not averse to long grinds and opening-to-endgame transitions (along with occasional transpositions to 1. d4 openings such as the Queen's Gambit or Nimzo-Indian defense). On the other hand the Caro-Kann has been a deadly weapon in the hands of positional masters like Karpov and Petrosian, and no less than Bobby Fischer famously had terrible problems from the White side - in his youth the Soviets discovered this flaw and bashed him with it relentlessly.
I'll play 1. e4 if you promise not to play 1....c6. Deal?

Since Bobby never saw fit to extend his excellent "Bust to the Openings" series beyond the King's Gambit, we'll take a look at one of his most troubled openings for a clear bust. Much to my surprise, a total refutation exists in the much-studied classical, or Capablanca, variation. Long thought to have been analyzed to a virtual draw, we will now prove this line to end in disaster for Black in all variations. Computer analysis and world champions may disagree, but rather than personally defeat the naysayers on the way to world fame I will share my insights with you, so together we can wreak havoc on the weekend quads of America.

1. e4!
Best by test

1... c6 2. d4 d5
White has the precious pawn duo but Black smartly responds in the center

3. Nc3 dxe
Not much choice for Black here - either he has to go into a Modern with 3....g6 or he will have trouble developing his pieces without the pawn exchange. Now the question - Black gives White's knight a free ride the center, but what is it worth?

4. Nxe4 Bf5
The main move, most challenging. Black gets his light-squared bishop out of prison with tempo, and looks to play a favorable version of the Slav. Also possible are ....Nd7 or ....Nf6, though I think those lines lead to comfortable edges to White as a rule. Perhaps we'll return to those later.

5. Ng3 Bg6 6. h4!? h6
Alekhine once considered h4!? too exotic and thought that Bd3, O-O and c3 were enough to give White a plus. However, in the church of Yaacov we have faith in Black's position where Black will build light bricks on c6 and e6 leaving his dark-squared bishop happy. Conversely White's remaining bishop stares forlornly at c3 and d4, and asks 'Why??'. No, more concessions must be extracted from Black and a kingside bind with h4-h5 is thought to be the ticket, though of course the h-pawn can become a weakness. ('A typical dilemma in modern opening play' -Kasparov)

7. Nf3 Nd7
In recent times Black has also been trying ...Nf6!?, letting the White knight jump into e5 with the threat to snap the bishop on g6. However, the bishop can retreat to h7 and Black seeks to prove that the knight on e5 is a weakness. Black delays the development of the knight on b8 with the hopes of getting in ...c5 and ...Nc6 (Gallagher points out that this move is a rare achivement for Black in the Caro-Kann). A subtlety worth exploring? This is one of the challenges in fighting the Caro-Kann - one must have the same tolerance for pain that a Caro player has. Again, perhaps we'll return to this later.

8. h5 Bh7 9. Bd3 BxB 10. QxB
And so Black has not only got his light-squared bishop into play but has exchanged it for White's LSB, a strong achievement! However, white concedes this as a prerequisite for queenside castling, which is the only way to leverage the advanced h-pawn in his favor through future kingside pawn advances. Now Black is at a crossroads with several choices that we will take a look at in the future. Where to castle? How to develop? 10 moves of theory but we're only halfway there. Tolerance for pain - respect it in your opponent, nurture it in yourself. Positional understanding must prove victorious. More later.





Wednesday, November 10, 2010

 

Marathon and Chess...Sorry, No Golf!

Last Sunday, KCC member Mike Wojcio runs his 114th marathon! Below, Mike taking a quick break at the 17 mile mark.

A quick visit to cheer Mike on then off to Barnes and Nobles on 86th and Lex for a Kasparov book signing. I didn't have any books by Garry, so I decided to crack and buy one for him to sign....

Here I am giving Garry some pointers on his opening repertoire. Then came Ian....

Garry scribbled...Next time, wait at the end of the line.

Labels: ,


Friday, November 5, 2010

 

Anand-Leko: Denouement


In the last round, Anand had his fate in his control. The task was simple - draw, and the title was his. For the third time in the tournament Anand faced the potentially dangerous Marshall attack, but he had a plan to pour cold water on the attack.


video


Anand has firsthand evidence that it does, in fact, feel good to be a gangster

With this draw, Anand finished in 1st by a clear point over the field. My impressions: Anand played critical lines in sharp openings round after round, and did not vary from this strategy even when he pulled into the lead. Well into the era of computer analysis, Anand continued to debate unclear positions with positional and material imbalances. He was rewarded with an impressive +4 overall score, including +1 =2 against the Marshall Attack and +1 =2 in the razor-sharp Anti-Moscow Gambit. Three of those draws came in tournament situations where a draw was a strategic victory. His only shortcoming came against the Petroff where he was not able to pose any problems against the world's experts in Kramnik and Gelfand. For their part, Kramnik and Gelfand can perhaps be faulted for a lack of ambition. Each finished 2nd on +2, but in the end settled for draws in those same Petroff games where they had their best practical chances against the future champion.
All this could be seen in evidence later in the fascinating Anand-Kramnik world championship match of 2008, where Anand scored blistering wins from the Black side in sharp openings whereas Kramnik played no less than the Exchange Variation of the Slav in game 1 with a quick draw. Anand represents a departure from the reign of Kramnik, playing in the universal style of Spassky which is comfortable both in attack and on defense, playing for complications where it is demanded. He proved as much by adopting a constricting positional style three years later in his successful match against Topalov. Luckily, the story is not finished, and we'll see another championship match from Anand in the future...

Tuesday, November 2, 2010

 

This Is Not Sparta


The Kenilworth Karpovs held off the barbarians of Sparta in their second Garden State Chess League match at West Orange. A press photo from the event is shown below:


Board by board results:
Steve 'MVP' Stoyko (B) 1-0 Tom Murray
Ian Mangion (W) 1-0 Mark Van der Veen
'Mad' Max Sherer (B) 1-0 Rick Schluter
'Mad' Mike Wojcio (W) 0-1 Russ Avarella

Karpovs 3-1 Sparta

Tactics fun on board 2....here in a tough position Black played 32...Ba3!? (cheapo alert), what is the cleanest way to end the game after 33. Bd4 Bd6? See comments for answer.


Monday, November 1, 2010

 

Grischuk-Anand: Round 13


In the penultimate round, Grischuk displayed admirable fighting spirit by playing for the win and threatening to spoil Anand's championship run. Meanwhile Gelfand still had chances for overall victory and played a tense game against Kramnik on the next board.


Looking for the kill....is it there?

video

After this close escape, Anand was one step from the title. The only way he could fail is to lose and for Gelfand to win. But at least this meant the last round would be a fighting round.

Anand 8.5
Gelfand 7.5
Kramnik 7.0
Leko 6.5
Aronian 6.0
Morozevich 5.5
Grischuk 5.5
Svidler 5.5

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