The position arising after 6. Nxd4 often occurs from the English Opening: 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. d4 cxd4 5. Nxd4 Bb4 6. g3. The main continuation here is 6… O-O, while from the other options 6… Ne4 seems to be the only one that allows Black to equalize.
After 6… O-O 7. Bg2 d5 there are two interesting sidelines: 8. O-O dxc4 9. Qa4 and 8. Qb3 Bxc3+ 9. bxc3. Players of White usually opt for 8. cxd5 where on 8… Nxd5 move 9. Bd2 leads to a balanced and not too complicated position. Move 9. Qb3 is frequently seen on the highest level, where beside 9…. Qa5 10. Bd2 Nc6 Black is also able to get a decent position with 9… Nc6, 9… Qb6 and 9… Na6.
[Diagram: White to Move] V. Zvjaginsev – Z. Almasi, Altensteig 1994. Black pieces lack coordination, while white Bishop on d4 dominates the black squares. Can you see how White can obtain a decisive advantage in just a couple of moves?
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