1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6 According to the Megabase, this is the  first time that the world champion uses the Berlin Defense. This might,  however, have been on the cards in her match against GM Aleksandra  Goryachkina. 4. e1g1  4... f6e4  5. d2d4  5... e4d6  6. b5c6  6... d7c6  7. d4e5  7... d6f5  8. d1d8  8... e8d8  9. f1d1  9... d8e8 