1. e2e4  1... e7e5  2. g1f3  2... g8f6 Caruana played the Petroff in several games during the match. This is one of the most reliable defenses for Black and it's no wonder that many elite players are happy playing it. 3. f3e5  3... d7d6  4. e5f3  4... f6e4  5. b1c3 This line has a good reputation. Caruana has great experience in it, having played this position with both White and Black, including a game in the World Championship match against Carlsen. 5... e4c3  6. d2c3  6... f8e7  7. f1d3  7... e8g8  8. e1g1  8... b8d7  9. f1e1  9... d7c5  10. c1f4 If it had been a game at normal time control, Erigaisi would probably have moved the d3-bishop to avoid the exchange. In a bullet game, this is just a minor detail. Or is it not $2 As we will see, the pair of bishops was crucial to Caruana's victory. 10... c5d3  11. d1d3  11... f8e8  12. h2h3  12... h7h6  13. e1e2  13... e7f6  14. a1e1  14... e8e2  15. e1e2  15... c8d7 The position is objectively equal, although it's usually better to be the one with the bishops. 16. f3d2 Trying to activate the knight. 16... d8f8 A nice move, preparing to bring the rook to e8. 17. d3f3  17... d7c6  18. d2e4  18... f6e7  19. f3g3  19... f7f5 [%c_effect f5;square;f5;type;GreatFind;persistent;true] Pushing the knight back. 20. e4d2  20... g7g5 [%c_effect g5;square;g5;type;GreatFind;persistent;true] 21. d2b3  21... a8e8  22. b3d4  22... c6d7  23. f4d2 [%c_effect d2;square;d2;type;Inaccuracy;persistent;true] 23... e7f6  24. g3f3  24... e8e2  25. f3e2  25... c7c6  26. e2d3  26... f6g7  27. c3c4 The characteristic of the game doesn't change: Black has the pair of bishops, but the white knight is well-placed. The position is balanced. 27... f8f6  28. d2c3  28... f6g6  29. d4e2  29... g7f8 [%c_effect f8;square;f8;type;Interesting;persistent;true] A good move, avoiding the exchange. It looks dangerous to grant White the diagonal, but there is no reason to worry. 30. d3d4  30... b7b6  31. a2a4 [%c_effect a4;square;a4;type;GreatFind;persistent;true] Creating threats on the queenside. 31... g8f7  32. a4a5  32... c6c5  33. d4d2 [%c_effect d2;square;d2;type;Inaccuracy;persistent;true] Now Black gets some advantage. 33... g6e6  34. a5b6  34... a7b6  35. b2b3  35... d7c6 Black's position is more pleasant, but White holds everything until a fatal blunder is made. 36. e2g3  36... f5f4  37. g3f1  37... d6d5  38. c4d5  38... e6d5  39. f2f3  39... d5d2  40. f1d2  40... b6b5  41. g1f2  41... f7e6 