1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6  4. d2d3  4... f8c5  5. e1g1  5... c6d4  6. f3d4  6... c5d4  7. c2c3  7... d4b6  8. b1a3  8... c7c6  9. b5a4  9... d7d6  10. a4c2 So has experience in that position with both colors, but the Berlin is tough to break, and he won't achieve much in the opening.