1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... f8b4  5. c1g5  5... h7h6  6. g5f6  6... d8f6  7. e2e3 In the Ragozin defence both players follow an earlier game of theirs, played six years ago. 7... e8g8  8. a1c1  8... d5c4  9. f1c4  9... c7c5  10. e1g1  10... c5d4  11. c3e4 That is still the previous game. 11... f6e7  12. f3d4 Only here does Mamedyarov deviate. He decided to try and win without any strategical risk, in a symmetrical position. 12... c8d7  13. c4e2  13... b8c6  14. a2a3  14... b4a5  15. d4b3  15... a5b6 All of this has been seen before and White comes with a logical novelty. 16. d1d6 