1. d2d4  1... d7d5  2. c2c4  2... c7c6  3. b1c3  3... g8f6  4. g1f3  4... e7e6  5. c1g5  5... h7h6  6. g5h4 The most  dangerous continuation against the Moscow variation, as Anand once said. 6... d5c4 