1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. e2e3  4... c7c5  5. g1e2  5... d7d5  6. a2a3  6... b4a5 A fashionable move in the Nimzo-Indian Defense. Historically 6...Bxc3 is more popular. 7. d4c5  7... d5c4 