A strong novelty. White  prepares a blockade on the light squares.
1. e2e4  1... c7c5  2. g1f3  2... b8c6  3. d2d4  3... c5d4  4. f3d4  4... g8f6  5. b1c3  5... e7e5  6. d4b5  6... d7d6  7. c3d5  The new main line nowadays. 7... f6d5  8. e4d5  8... c6b8  9. a2a4  9... f8e7  10. f1e2  10... e8g8  11. e1g1  11... b8d7  12. c1d2  12... f7f5  13. a4a5  13... f5f4 [#]