The world champion is  closely watching the efforts of his competitors and comes up with an  improvement upon a very fresh game.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6 The Berlin versus So! Why not? 4. d2d3  4... f8c5  5. b5c6  5... d7c6  6. e1g1  6... d8e7  7. b1d2  7... c8g4  8. h2h3  8... g4h5  9. d2c4  9... f6d7 