Blocking the black bishop while connecting the passers.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... f8e7  6. f1e1  6... b7b5  7. a4b3  7... d7d6  8. c2c3  8... e8g8  9. h2h3  9... c8b7  10. d2d4  10... f8e8 The Zaitsev variation is a very rare bird in Fedoseev's opening repertoire. He had played it in a couple of online  games recently but also in one game in this tournament. 11. b1d2  11... e7f8  12. a2a3  12... h7h6  13. b3c2  13... d6d5 However, the impression is that Black did not  surprise his opponent. Karjakin knew a lot about this move, as he had used it a few years back as Black himself. 14. d4e5  14... c6e5  15. f3e5  15... e8e5  16. d2f3  16... e5e8  17. e4e5  17... f6e4  18. c1f4 Overprotecting his key pawn. 18... c7c5  19. a3a4 \"I remembered that this position was somehow very  critical, that with precise play White should be slightly better.\"  (Karjakin) 19... f7f5  20. h3h4 Karjakin did not check the opening  beforehand but was happy to find this new and interesting idea. The move  is logical as White needs to attack on the kingside. 20... f8e7 Fedoseev is quite ambitious and apparently believed that he  would have enough time to grab the annoying white pawn. 21. h4h5  21... e8f8 \"Maybe this was not the best, but it was logical, with the  idea Qd8-e8 to attack the h5-pawn.\" (Karjakin) 22. a4b5 White has decided that the trade of a rook pair is in his favor. In fact, he has already envisioned a possible scenario where he is winning the opponent's knight in the center and wants to deprive the opponent of  any counterplay! 22... a6b5  23. a1a8  23... b7a8  24. e5e6 Opens the road for the knight and once installed on g6, it will deliver deadly threats. 24... f8e8  25. f3e5  25... e7g5  26. e5g6 The knight is now close to the black king and is  ready to support the passer. White's idea has worked perfectly well. 26... d5d4 A desperate try. 27. c3d4  27... e4f2  28. g1f2  28... g5f4  29. g6f4  29... d8h4  30. f2g1 The neatest win. 30... h4f4 