The Vienna Variation is generally regarded as a reliable choice for the players of Black, and Line 247 deals with the most critical lines in this variation.
After 7… cxd4 8. Nxd4 Black usually plays Qa5, with or without exchanging the Bishop for the Knight on c3.
After the immediate 8… Qa5 White can return the dark-squared Bishop to d2: 9. Bd2, where the game typically continues with 9… Qc5 10. Bb5+ Bd7 11. Nb3 Qe7 12. Bd3 Nc6, and Black’s position remains solid.
On the other hand, after 8… Bxc3+ 9. bxc3 Qa5 White has the following options: 10. Nb5 Nxe4 11. Bf4, 10. Bxf6 Qxc3+ 11. Kf1 gxf6 12. Rc1 and 10. Bb5+ Bd7 11. Bxf6 gxf6 12. Bxd7+ Nxd7 13. O-O. In any case, both sides have their trumps – Black King is slightly exposed and White is either a pawn down or stays with the weak c-pawn.
[Diagram: White to Move] G. Blask – A. Grube, corr. 2009. White is obviously trying to exploit the poor placement of Black King. How can he create direct threats, and launch a strong attack?
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