[June 11, 2018] Updated Opening Line by Bojan Vučković:
Sicilian Defense, Lasker-Pelikan Variation – Chelyabinsk Variation (Main Line with 12… O-O)

[Line 439 : 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c3 Bg5 12. Nc2 O-O]

It turns out that the old main move 12… O-O is actually an inaccuracy, since White has a nice way to obtain the initiative, even though moves like 13. Be2, 13. g3 or 13. h4 don’t seem to pose Black any problems.

The most promising choice for White is 13. a4 bxa4 14. Rxa4 a5 and here after 15. Bb5 Ne7 16. Ncb4 Bh3! black gets excellent counterplay. That’s why White should proceed with 15. Bc4 and after 15… Rb8 move 16. b3 is more precise than the similar-looking 16. Ra2.

After 16. b3 Kh8 17. Nce3 the most critical position of this opening line occurs. After 17… Nce7 White gets a small but stable advantage with 18. Nxe7 Qxe7 19. Nd5 Qd8 20. O-O. Other options are even less promising for Black: after 17… g6 18. h4 Bxh4 19. g3 Bg5 20. f4 Black is in serious problems, while after 17… Be6 18. h4 Bf4 19. Nf5 g6 20. Nfe3 White again threatens to launch the attack along the h-file.

[Diagram: White to Move] V. Kramnik – L. Van Wely, Monte Carlo (rapid) 2005. Black took the poisoned pawn on h4, which gave White a very important resource. What is the best way to proceed?

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