1. e2e4  1... e7e5  2. g1f3  2... g8f6  3. f3e5  3... d7d6  4. e5f3  4... f6e4  5. d2d4  5... d6d5  6. f1d3  6... f8d6 This variation of the Petroff Defense is very popular nowadays. Nepomniachtchi had great success with it in last year's Candidates Tournament. 7. e1g1  7... e8g8  8. c2c4  8... c7c6  9. f1e1  9... c8f5  10. d1b3  10... d8d7  11. c1e3  11... d5c4  12. d3c4  12... b7b5 A new and good move. It guarantees the a6-square for the knight. 13. c4d3  13... b8a6  14. a2a3 [%c_effect a3;square;a3;type;GreatFind;persistent;true] Avoiding 14...Nb4. 14... f5g6  15. f3h4  15... f8e8  16. h4g6  16... h7g6  17. b1c3  17... e4c3  18. b2c3  18... g8f8 [%c_effect f8;square;f8;type;Mistake;persistent;true] This move is the beginning of Black's problems because it loses an important tempo. Moussard probably was concerned with the tactical idea of Bxg6, but Black also has his own trick. 19. a3a4  19... a6c7  20. a4b5  20... c6b5  21. a1a5 [%c_effect a5;square;a5;type;GreatFind;persistent;true] An excellent move, avoiding a7-a5 and paralyzing Black's queenside. 21... a7a6  22. g2g3 [%c_effect g3;square;g3;type;GreatFind;persistent;true] No hurry. 22... a8b8  23. e1a1  23... d7g4  24. g1g2  24... g4d7 Black has no active plan. The knight on c7 is tied to the defense of the a6-pawn, and White has a passed pawn and the bishop pair. 25. d3e2 [%c_effect e2;square;e2;type;GreatFind;persistent;true] Another excellent move: the bishop goes to a better diagonal. 25... f8g8 