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kasparovfan 67 ( +1 | -1 )
Keres attack, Najdorf and Scheveningen Some time ago I read that Kasparov usually plays 5....a6 in the Sicilian because that prevents the Keres attack.

Is it the 5. ...a6 move that does this or is it the 6.... e6 move that prevents this attack, and how does it prevent it?

Also, I waswondering what the name of the following move order is: 1. e4 c5, 2. Nf3 d6, 3. d4 cxd4, 4. Nxd4 Nf6, 5. Nc3 a6, 6. Be2 e6. Is this called the Najdorg or the Scheveningen? If I'm not mistaken, it's the latter. But, for instance in the books on the World Chamionship Match in 1999 between Kasparov and Anand it was referred to as the Najdorf, even though,in my view, the typical move of the Najdorf is e5. See for instance Daniel King's book "Winning the the Najdorf," in which the move 5. ...e6 is absent.

Best wishes, René
caldazar 65 ( +1 | -1 )
The Keres Attack is 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g4, obviously intending g5. By not playing 5... e6, Black maintains control over g4 and prevents the pawn thrust. But beyond that, the thing to note is that after 6. g4, attempts by Black to counterattack in the center fail (an attack on the wing should be met by an attack against the center). After 6. g4, 6... d5 is met by 7. exd5 Nxd5 8. Bb5+ Bd7 9. Nxd5 exd5 10. Qe2+ Qe7 11. Be3 while 6... e5 is met by 7. Bb5+ Bd7 8. Bxd7+ Qxd7 9. Nf5. In both bases, it is White's resource of Bb5+ that causes Black problems, so by playing 5... a6 and only then ...e6, he cuts out some of the problems associated with meeting an early g4 by White with a central counterthrust, rendering White's g4 less effective.