Black has a few popular options against 6. O-O. Line 6… c6 7. Nbd2 b6 8. Qc2 Bb7, followed by Na6 or Nbd7 is not too demanding, yet good enough for Black to get roughly equal positions, while moves like 6… Nc6 and 6… c5 are not as promising.
6… dxc4 is by far the most popular choice for Black on 6th move, where 7. Qc2 is covered in depth in our Lines 236-238. Move 7. Ne5 can frequently be seen on the highest level, too. Black usually reacts with 7… Nc6 and after 8. Bxc6 bxc6 9. Nxc6 Qe8 10. Nxe7+ Qxe7 11. Qc2 the most critical position of this opening line occurs. White often recaptures the c4-pawn, but Black gets sufficient compensation.
[Diagram: White to Move] Black’s queenside is undeveloped, and being two pawns up is not enough to maintain the balance. How does White make the best of his active pieces to obtain a strong initiative?
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