A logical novelty. It is always good to get rid of such a powerful piece.
1. e2e4  1... c7c5  2. g1f3  2... b8c6  3. d2d4  3... c5d4  4. f3d4  4... e7e5  5. d4b5  5... d7d6  6. b1c3  6... a7a6  7. b5a3  7... f8e7  8. g2g3  8... g8f6  9. f1g2  9... b7b5  10. c3d5 