Another move  that caused deep thought by the Russian GM.
1. e2e4  1... c7c6  2. d2d4  2... d7d5  3. e4e5  3... c8f5  4. h2h4  4... h7h5  5. c2c4  5... e7e6  6. b1c3  6... g8e7  7. g1e2  7... b8d7  8. e2g3  8... f5g6  9. c1g5 This move came as a surprise for Black, who spent  almost an hour on his next four moves! 9... d8b6 