[November 22, 2017] Updated Opening Line by GM Boris Avrukh:
Ruy Lopez, Closed Defense – Breyer Variation (Main Line with 15. b3)

[Line 410 : 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. b3]

The Breyer Variation is one of the ever popular choices on the highest level, often employed by the World Champion Magnus Carlsen.

Line 410 covers b2-b3, one of the most principal choices for White on 15th move. The idea is either to fianchetto White’s dark-squared Bishop, or to push d4-d5, followed by c3-c4. Black has several ways to equalize, and probably the safest is the main line 15… Bg7 (with the idea d6-d5), and after 16. d5 Rc8, Black has c7-c6 with mutual play.

[Diagram: White to Move] One of the critical positions in Line 410 occurs after 15… d5 16. Bg5 h6. It is necessary for players of White to know the consequences of the topical piece sacrifice 17. Bh4! g5 18. Nxg5, but if they plays precisely, their accuracy pays off – Black has lots of problems to solve!

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