[Event "US Open"] [Site "Rancho Mirage"] [Date "????.??.??"] [Round "9"] [White "IM Viktor Matviishen"] [Black "GM Aleksey Sorokin"] [Result "0-1"] [WhiteElo "2558"] [BlackElo "2648"] [Annotator "JJ Lang"] [Variant "Standard"] [ECO "A07"] [Opening "King's Indian Attack: Double Fianchetto"] [Source "https://lichess.org/study/FRzmURsX/7lujQlME"] [Orientation "white"] 1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O c5 5. d3 Nf6 6. Nbd2 Nc6 7. e4 O-O 8. c3 e6 9. Re1 a5 10. e5 Nd7 11. d4 cxd4 12. cxd4 f6 13. Bh3 fxe5 14. Bxe6+ Kh8 15. Bxd5 { White spent 25 minutes on this move. We have reached a truly baffling type of position thematic in French structures where White wins both center pawns at the cost of grossly transforming the nature of the center. } 15... exd4 (15... Nxd4 { is probably just as good } 16. Nc4 { Black keeps an active piece on the board, but has a less open center in return. }) 16. Bxc6 bxc6 17. Nc4 c5 18. Bg5 Nf6 19. Qb3 a4 20. Qb6 Qd5 21. Ncd2 Bb7 22. Bf4 g5?! (22... Nh5 { appeared far less committal } 23. Re7 { but after } 23... Nxf4 (23... Rf7 24. Rxf7 Qxf7 25. Qc7 Rf8 { also preserves the initiative into the endgame, but gives up hopes of a more concrete win }) 24. Qxb7 Qxb7 25. Rxb7 Nd3 { perhaps Black was unsatisfied } 26. Ng5 { since White can sacrifice for an attempt at activity }) 23. Re5 gxf4?! { Played relatively quickly, Black still enjoys an extra 27 minutes } (23... Ra6! { is objectively best, although the small intiiative may not be worth the complications } 24. Rxd5? (24. Qc7 Qd7 25. Rxg5 Qxc7 26. Bxc7 Bh6) 24... Rxb6 25. Rxg5 Bh6!) 24. Rxd5 Bxd5 25. Re1 (25. Qxc5! { It is not clear why White rejected this move. } 25... d3 (25... Rac8 26. Qb5 a3 27. b3 { and even preserving the pawn structure should be fine } 27... Rc2 28. Qd3 Rc3 29. Qxd4 Rxf3 30. Nxf3 Bxf3 31. Qa4 { with considerable winning chances }) 26. Ne5 { is not scary }) 25... fxg3 26. hxg3 Ng4 27. Re7 Rxf3 28. Nxf3 Bxf3 29. Rd7?! { Long think wrong think. White used half of his 20 minutes here, and now has under a minute per move to reach the time control. } (29. Qxc5 d3 30. Qf5 Be2 31. Qe4 Rf8 { looks incredibly dangerous for White, but after } 32. Re8! Nf6 33. Rxf8+ Bxf8 34. Qd4 Kg7 35. Kg2 { the black pieces have great difficulty coordinating against such a centralized queen on an open board }) 29... Nf6 30. Rf7 Re8 31. Kf1 d3 32. Qd6 (32. Qxc5?? d2! { with forced mate: a nice illustration of why White needed to show more urgency with re-grouping the queen }) 32... Bh5 33. Rc7 Bg6 34. f3 Rf8 35. Qe7 Ne8 36. Rxc5 Rxf3+ 37. Kg2 Rf8 38. b4? { Missing a resource with only two minutes remaining } (38. Rc8! Rg8 39. Qb4! { stopping Bg6-e4+ and making it difficult for Black to untangle }) 38... axb3 39. axb3 Nf6 40. Rc7 Rg8 41. Qe1 Re8 42. Qc3 Re2+ { And now Black can finally use their many pieces } 43. Kf1 Ne8 44. Rxg7 Nxg7 45. b4 h6 46. b5 Rc2 47. Qd4 Rc1+ 48. Kf2 d2 49. Qxd2 Rc2 50. Qxc2 Bxc2 51. Ke3 Ba4 { 0- } 0-1