1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. d2d4  3... e5d4  4. f3d4  4... g8f6  5. d4c6  5... b7c6  6. f1d3 A rare line that is more venomous than it seems. 6... d7d6 A simple and effective way to face the challenge. 7. e1g1  7... f8e7 