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Download PGN of January '08 Nimzo and Benoni games
Modern Main Line: Black plays ...a6 and ...b5
1 d4 Nf6 2 c4 e6 3 Nf3 c5 4 d5 d6 5 Nc3 exd5 6 cxd5 g6 7 e4 a6 8 h3 b5 9 Bd3 Bg7 10 0-0 0-0:
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We begin with the game Flear - Chatalbashev, Hastings 2007/08, which is a good demonstration of how well things can go for Black in a best-case scenario.
I also had to include the game Malaniuk - Oleksienko, Kharkiv 2007, if only because Black comes up with a remarkable concept which, if workable (and it's a considerable 'if'), could force a major reassessment of this line.
Modern Main Line: Black plays 9...Bd7
1 d4 Nf6 2 c4 e6 3 Nf3 c5 4 d5 exd5 5 cxd5 d6 6 Nc3 g6 7 h3 Bg7 8 e4 0-0 9 Bd3 Bd7:
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Black's idea is to accelerate his queenside play with moves such as ...b5, ...c4 and ...Na6-c5. If White plays passively he may wind up in an inferior version of the ...a6, ...b5 lines (for example, Black hasn't spent a move on ...a6). Fortunately for White, there are ways to take advantage of Black's somewhat artificial-looking move. Even so, Black players should consider 9...Bd7 as a surprise weapon because it's rare and White must play accurately to exploit its defects. And plausible moves allow Black to gain very good counterplay. See Chatalbashev - Satyapragyan, Hastings 2008, for my thoughts.
Modern Main Line: Black plays 9...b5
One of the most critical lines after 1 d4 Nf6 2 c4 e6 3 Nf3 c5 4 d5 exd5 5 cxd5 d6 6 Nc3 g6 7 h3 Bg7 8 e4 0-0 9 Bd3 b5 is 10 Nxb5 Re8 11 Nd2!? and now the crazy sacrificial line 11...Nxe4!? 12 Bxe4 Ba6 13 a4 Qa5 14 Nxd6 Nd7, which has been analysed in quite a few places on this website (most recently in Wells-Gormally, Portsmouth 2006). In Shishkin - Kononenko, Kharkov 2007, Black makes a very strong case for the alternative 11...Nxd5!?:
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After 12 Nc4 Black unleashed the clever novelty 12...Re6!?, which does seem to solve most of Black's problems. Judging from this game, 11...Nxd5 looks like a good practical move to me.
Fianchetto Variation: Main Line
We begin with a variation which has been considered to be the main line of the Fianchetto. Avrukh - Kamsky, World Cup, Khanty-Mansiysk 2007, began 1 d4 Nf6 2 c4 e6 3 g3 c5 4 d5 exd5 5 cxd5 d6 6 Nc3 g6 7 Bg2 Bg7 8 Nf3 0-0 9 0-0 a6 10 a4 Re8 11 Nd2 Nbd7 12 h3 Rb8 13 Nc4 Ne5 14 Na3 Nh5 15 e4 Bd7 16 a5:
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I've always thought 16 a5 was White's strongest move here, but Kamsky's convincing play is making me think twice about this.
In Bareev - Alekseev, World Cup, Khanty-Mansiysk 2007, Black chooses 9...Nbd7 10 a4 a6 11 Nd2 Nh5 (instead of 11...Re8).
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This is a worthwhile alternative, which seems to take the sting out of Nc4 ideas for White. Bareev replied 12 Nce4!, which I suspect is White's best try for an advantage.
A third Fianchetto game from the same tournament was Belov - Khalifman, World Cup Khanty-Mansiysk 2007 (in all three Black steered clear of the Catalan!). After 9...Re8 White avoided the 10 Nd2 a6 11 a4 Nbd7 main line and instead opted for 10 Bf4:
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Khalifman replied with the principled 10...Ne4!? 11 Nxe4 Rxe4 12 Nd2 and now the exchange for a pawn sac 12...Rxf4 13 gxf4 Bxb2 14 Rb1 Bg7. Previously I was suspicious of the objective merits of this sacrifice, and I'm still not entirely convinced. But if such a theoretician as Khalifman plays it, you have to sit up and take notice!
That's it for now. Till next month, John