1. d2d4  1... d7d5  2. c2c4  2... e7e6  3. b1c3  3... c7c6  4. c4d5  4... e6d5  5. d1c2 This move order prevents  the active Bc8-f5 move. 5... f8d6 But Black can pay with the same coin  and prevent the alternative activation of the white bishop. 6. g1f3  6... g8e7  7. c1g5  7... f7f6  8. g5d2  8... b8a6  9. a2a3  9... a6c7 