1. e2e4  1... e7e5  2. g1f3  2... g8f6  3. f3e5  3... d7d6  4. e5f3  4... f6e4  5. d2d4  5... d6d5  6. f1d3  6... f8e7 6...Bd6 is the favorite move of Nepomniachtchi, the biggest specialist in the Petroff Defense today. For this reason, the move has become very popular. But there's nothing wrong with the development of the bishop on e7. 7. e1g1  7... c8f5  8. f1e1  8... e8g8  9. c2c4  9... b8c6 [%c_effect c6;square;c6;type;GreatFind;persistent;true] This is more accurate than 9...c6. 10. c4d5  10... d8d5  11. b1c3  11... e4c3  12. b2c3  12... f5d3  13. d1d3 With the Petroff Defense, it's always the same thing: White gets a slightly better position, but Black manages to equalize with precise play and is close to a draw. It's not the most exciting prospect for most games, but for those who don't mind that, there isn't a better weapon. 13... a8e8  14. c1f4  14... e7d6  15. c3c4  15... d5h5  16. f4d2  16... b7b6 An important move to prevent c4-c5. I found six games in my database in this position. Can you guess the result in all of them $2 17. g1f1 Bringing the king closer to the center. 17... h5g6 A good and natural move that is also a novelty. 18. d3g6  18... h7g6 White doesn't have any advantage in this endgame. 19. a1b1  19... e8d8  20. d4d5  20... c6b8  21. d2g5 Played to create some weakness in Black's position. 21... d8c8 A very solid choice. 22. b1d1  22... f8e8  23. f3d4  23... a7a6  24. g5h4  24... b8d7  25. d4c6  25... g8f8  26. h4g3  26... d6g3  27. h2g3  27... e8e1  28. f1e1  28... c8e8  29. e1d2  29... d7e5  30. d2c3  30... e5c6  31. d5c6 Rook endgames are always tricky, and Muzychuk will find the resources to keep the game alive. 31... e8e6  32. d1d8  32... e6e8  33. d8d7  33... e8e7  34. c4c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] An excellent move. 34... f8e8 The only defense. 35. c5b6  35... c7b6  36. d7b7 [%c_effect b7;square;b7;type;Interesting;persistent;true] Another clever move to create problems. 36... e8d8 [%c_effect d8;square;d8;type;GreatFind;persistent;true] 37. b7b6  37... e7e2 The most important factor in a rook endgame is the activity of the rook. For this reason, Black should make a draw here. 38. b6a6  38... e2f2  39. a6a7  39... f2f6 [%c_effect f6;square;f6;type;Mistake;persistent;true] A losing mistake. 40. a7d7 [%c_effect d7;square;d7;type;Mistake;persistent;true] Muzychuk returns the favor. 40... d8c8 [%c_effect c8;square;c8;type;Mistake;persistent;true] The wrong way. 41. c3d4 [%c_effect d4;square;d4;type;Inaccuracy;persistent;true] 41... f6c6  42. d7f7  42... c6c2 [%c_effect c2;square;c2;type;Mistake;persistent;true] The final mistake, after which there's no possible salvation. 43. f7g7  43... c2a2  44. d4e5 [%c_effect e5;square;e5;type;GreatFind;persistent;true] White shouldn't capture on g6 so fast. 44... a2g2  45. g7g6  45... c8d7  46. e5f6 