1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. d1c2  4... e8g8  5. e2e4  5... d7d5  6. e4e5  6... f6e4  7. f1d3  7... c7c5  8. g1f3 An extremely sharp Nimzo-Indian line, the favorable choice of  Mamedyarov. 8... c5d4  9. f3d4 