The bishop yields the d4-square to the king.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... d7d6 An interesting variation of the Ruy Lopez that is recommended by GM Gawain Jones in an excellent course. 6. f1e1  6... c8d7  7. c2c3  7... g7g6  8. d2d4  8... f8g7 The development of the bishop on g7 makes Black's position a little more active than usual, since on e7 the bishop doesn't have as much range. 9. h2h3 A move that is always useful in the Ruy Lopez, either to prevent a pin with Bg4 or to develop the bishop on e3 without fear of Ng4. 9... e8g8  10. b1d2 Black demonstrates convincing equality in the game continuation, so White should probably study an alternative to this move. 10... e5d4  11. c3d4  11... c6b4 An important move, offering to exchange bishops and threatening an invasion on d3. 12. a4d7  12... d8d7  13. d1b3  13... a6a5 The best way. 14. a2a3  14... b4c6 Another difficult move. 15. d4d5  15... c6b8 Sacrificing a pawn, but the knight is going to c5, and the activity on the queenside is enough to compensate. 16. b3b7  16... b8a6  17. b7b3  17... a6c5  18. b3c4  18... d7a4 This is the only move that justifies Black's previous play. White was threatening e4-e5. All of this is covered in Jones's course and has been played before. 19. e4e5 Forcing simplifications. I believe that here Sjugirov was satisfied with a draw and this is the expected result. 19... a4c4  20. d2c4  20... d6e5  21. f3e5  21... f6d5  22. e1d1  22... d5b6  23. c1e3  23... c5a4 Only this is a novelty. 24. e3d4  24... a8d8  25. d4b6  25... c7b6  26. e5d7 26.f4 or 26.Rxd8 is also possible, but there's nothing wrong with this move. 26... f8e8  27. d7b6  27... a4b6  28. c4b6  28... g7b2  29. d1d8  29... e8d8  30. a1a2  30... d8d1  31. g1h2  31... b2d4  32. b6c4  32... a5a4 Black has a slight advantage thanks to the superiority of the bishop against the knight, but White should have no trouble drawing. There is a chapter in Kasparov's monumental book \"The Test of Time\" in which he analyzes three equal endgames and how he managed to win all three in the same tournament, against (if I'm not mistaken) Larsen, Seirawan, and Petrosian. This game reminds me of this unforgettable chapter in the book, which tells the story of a young chess player's rise to the title of world champion and how important it is to master the technical part of the game. 33. g2g3 Directing the king to the center. 33... d4c5  34. a2c2  34... d1d4  35. h2g2  35... g8f8  36. c2c3  36... f8e7  37. c4e5 The knight is always a tricky piece. 37... d4d5  38. e5d3  38... c5b6  39. g2f3  39... d5b5 The rook is going to b3. Little by little, the situation becomes dangerous. 40. f3e2  40... b5b3  41. d3b4 A big mistake and the game becomes very difficult, if not impossible, to save. 41... e7d7  42. c3d3  42... b3d3  43. b4d3  43... d7c6 Now the game becomes a textbook demonstration of the advantage of a bishop over a knight in a position with pawns on both flanks. Let's also appreciate the merit of Black's king, showing why the monarch is an important piece in endgames. 44. e2d2  44... b6d4 Limiting the white king. 45. f2f3  45... c6d5  46. d2c2 