1. d2d4  1... g8f6  2. g1f3  2... d7d5  3. c1f4  3... e7e6  4. e2e3  4... f8d6  5. b1d2  5... d6f4  6. e3f4  6... d8d6  7. g2g3  7... b7b6 It is useful to trade the idle black bishop. 8. c2c3  8... e8g8  9. f1d3  9... c8a6  10. d3a6  10... b8a6  11. d1e2  11... a6b8  12. f3e5 An obvious move and a novelty. 