context: 1. d2d4  1... d7d5  2. c2c4  2... c7c6  3. g1f3  3... g8f6  4. b1c3  4... e7e6  5. c1g5  5... b8d7 The safest option for Black, taking the game to the Orthodox Defense. 6. e2e3  6... d8a5 The Cambridge Springs Variation has a vast legacy and was employed in the magnificent 1927 match between Capablanca and Alekhine. 7. c4d5  7... f6d5  8. d1d2  8... f8b4  9. a1c1  9... h7h6  10. g5h4  10... e8g8 10...b6 and 10...c5 are important alternatives. 11. a2a3  11... b4c3  12. b2c3  12... d5f6 A rare move. The players with Black usually accept the pawn sacrifice. 13. f1d3  13... b7b6 This move has never been played before, according to my database. Black wants to continue the thematic development of the bishop on a6. 14. e3e4  14... c8a6  15. c3c4 It's important to avoid the exchange since the pair of bishops is precisely one of the reasons for White's advantage. 15... a5d2  16. e1d2 With the bishop pair and a powerful pawn center, there's no doubt about White's advantage, but perhaps it's not as big as it seems. In any case, Fedoseev is an almost unparalleled master at turning questionable positions into victories. 16... f8e8 Preparing the break on e5. 17. e4e5 A natural reply, advancing the center and preventing it from being broken with e6-e5. The computer is not a big fan of this move. 17... f6h5 They say that a knight on the rim is dim, but what happens when we have to choose between two squares in the corner of the board $2 A saying definitely needs to be written about this too in order to help our decision-making. 18. d3e4  18... a8c8  19. g2g4  19... h5f4  20. h4g3  20... f4g6  21. h1e1 With accurate play, Firouzja manages to keep his center intact. 21... c6c5 Too hasty. Black has no adequate response against the d-pawn advance. 22. d4d5 Forced and excellent. 22... e6d5  23. c4d5  23... c8d8  24. d2c3 A good move, taking the king out of the x-ray with the black rook. 24... a6b7  25. a3a4 I'm a big fan of calm, prophylactic moves in advantageous positions. Firouzja prevents the b6-b5 move, which can give Black counterplay. 25... d7f8  26. c1d1 The center is pretty safe. 26... g6e7 