1. d2d4  1... g8f6  2. g1f3  2... d7d5  3. c1f4  3... c8f5  4. e2e3  4... e7e6  5. c2c4  5... f5b1 Quite a tricky line  which So used with both colors. 6. d1b1  6... f8b4  7. e1d1  7... b4d6  8. f4g5  8... h7h6  9. g5f6  9... d8f6  10. c4d5 