1. c2c4  1... e7e6  2. g2g3  2... d7d5  3. f1g2  3... g8f6  4. g1f3  4... f8e7  5. e1g1  5... e8g8  6. d2d4  6... c7c6  7. b1c3  7... a7a5 A curious move that is quite popular these days. The pawn advance can be useful in case of a plan with ...b6-Ba6. 8. f3e5 