1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... c7c6  5. e2e3  5... b8d7  6. f1d3  6... d5c4  7. d3c4  7... b7b5  8. c4d3  8... a7a6  9. e3e4  9... c6c5  10. e4e5 It's been a while since I've seen a game in this line, which is one of the most critical of the Semi-Slav Defense and was crucial for Anand's victory in the world championship match against Kramnik in 2008. 10... c5d4  11. c3b5  11... a6b5  12. e5f6  12... g7f6  13. e1g1  13... d8b6  14. d1e2  14... c8b7 This is the move that Anand's team analyzed in detail and that surprised Kramnik. 15. d3b5  15... h8g8  16. f1d1  16... a8a5 [%c_effect a5;square;a5;type;GreatFind;persistent;true] Sevian had played all this before in a 2016 game. 17. a2a4 [%c_effect a4;square;a4;type;Mistake;persistent;true] Mamedyarov must have been surprised at the opening as this move is refuted. 17... a5b5 [%c_effect b5;square;b5;type;GreatFind;persistent;true] This is Black's idea. The bishop is captured so that the knight can go to e5. 18. a4b5  18... d7e5  19. f3e1 [%c_effect e1;square;e1;type;Inaccuracy;persistent;true] Only now is there a change from Sevian's previous game. 19... f8b4 [%c_effect b4;square;b4;type;GreatFind;persistent;true] This natural move is a novelty and wins the game. 20. c1d2  20... d4d3 [%c_effect d3;square;d3;type;GreatFind;persistent;true] 21. e2h5 Other queen moves also lose. 21... e5g4 [%c_effect g4;square;g4;type;GreatFind;persistent;true] 22. h5h4 The lesser evil. 22... g4f2 [%c_effect f2;square;f2;type;GreatFind;persistent;true] 23. d2e3  23... b6e3  24. h4f2  24... e3e4  25. d1d2  25... g8g5 [%c_effect g5;square;g5;type;Interesting;persistent;true] Another black rook that acts in a curious way in this game. 26. a1a4  26... b4c5  27. a4e4  27... b7e4  28. e1d3 