[Event "US Open Championships"] [Site "Grand Rapids"] [Date "2023.08.03"] [Round "5"] [White "Andrew Tang"] [Black "Sharvesh R Deviprasath"] [Result "1-0"] [WhiteElo "2597"] [BlackElo "2432"] [Annotator "WGM Tatev Abrahamyan"] [Variant "Standard"] [ECO "E81"] [Opening "King's Indian Defense: Sämisch Variation, Bobotsov-Korchnoi-Petrosian Variation"] [StudyName "2023 U.S. Open"] [ChapterName "Andrew Tang - Sharvesh R Deviprasath"] [ChapterURL "https://lichess.org/study/bGhelHiK/3Kvmhcah"] [Orientation "white"] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 { A pet line of Andrew's. There are dozens of his games in the database, as Deviprasath seemed aware. } 5... O-O 6. f3 (6. Ng3 { is a set up Andrew tried twice against Grischuk. }) 6... a6 7. Be3 c6 8. c5 { The move Andrew tried against GM Martinez Alcantara in Chess.com's bullet brawl tournament just last month. It is interesting to note how the openings that grandmasters prepare for online bullet or blitz games are also played in over the board events. Carlsen also had success with this move against Grischuk in 2014. } 8... dxc5 { an inaccuracy that allows White to get a grip on the queenside } (8... b5 { Black needs to look for counterplay immediately. This was the main line played in the aforementioned Tang – Martinez Alcantara games. } 9. cxd6 exd6 10. Nf4 Re8 11. Qd2 Nbd7 12. Be2 Bb7 13. O-O { with a complicated position. Once Black gets in ... c6-c5, and White responds with d4-d5, then we will get a Benoni, but a better version for Black as the pawn is on b5. }) 9. dxc5 Nbd7 10. Qc2 Qa5 11. a3 Rd8 (11... Nxc5?? 12. b4 { wins the knight. }) (11... b5 { Black can try this move again. } 12. cxb6 c5 { Black's pawn structure is damaged, but he will get active piece play as compensation, unlike in the game. } (12... Nxb6?? 13. b4 { winning the knight again })) 12. Nf4 Nf8 13. Bc4 e5 14. Nd3 Qc7 { A waste of an important tempo! } (14... Be6 { is more accurate. We can compare this line to the game: } 15. b4 Qc7 16. Na4 Bxc4 17. Qxc4 Ne6 { Unlike in the game, the a4-knight doesn't find its way to d6 via b6-c4-d6 quickly, while the black knight will land on d4. }) 15. Na4 Be6 16. Nb6 Rab8 17. O-O N6d7 (17... Bxc4 18. Nxc4 { only helps White, as the knight is headed to d6. }) 18. Bxe6 Nxe6 19. Nc4 Nd4 20. Bxd4 exd4 21. b4 Ne5 22. Ncxe5 Bxe5 { The pawn structure has completely changed, so it is a good time to stop and do a summary of what has happened. We now have a position of knight versus bishop. The bishop's diagonal has opened somewhat and he has a passed d-pawn. However, the d3-knight is a great blockading piece, White still maintains a nice grip on the queenside and has easy play associated with the e- and f-pawn pushes on the kingside. Also, in the endgame, we can easily imagine the d pawn falling once the white king gets to d4 and the knight maneuvers around to capture it. Therefore, White has a comfortable advantage here. It is also difficult to find counterplay for Black. } 23. f4 Bg7 24. Qc4 Rd7 25. a4 Re8 26. Rae1 h6 27. f5 (27. e5 { was better, with the idea of shutting down the bishop, putting pressure on the d4-pawn with Re1-e4 and preparing ... f7-f5 in the next few moves. }) 27... Kh7 (27... gxf5 { an ugly but necessary move as Black cannot allow the White pawn to get to f6. } 28. Rxf5 (28. exf5 Rde7 { Black now gets some play on the e-file. } 29. Rxe7 Qxe7) 28... Re6 { followed by Rd7-e7 and Black gets counterplay against the e-pawn. }) 28. f6 Bf8 29. a5 h5 30. e5 { White is now completely dominating. } 30... Re6 31. Rf4 Qd8 32. g4 Bh6 33. gxh5 gxh5 (33... Bxf4 34. Nxf4 { It is even worse for Black to capture the Exchange and allow the knight into play, as both e6 and g6 come under threat. }) 34. Kh1 Bxf4 35. Nxf4 Qe8 36. Qd3+ Kh8 37. Qf3 (37. Qf5 { was simpler, as it defends e5. } 37... Qg8 38. Nxe6 fxe6 39. Qxh5+ Rh7 40. Qf3 { White is completely winning here. }) 37... Rxe5 38. Qxh5+ { A cute tactic, winning a piece. } 38... Rxh5 39. Rxe8+ Kh7 40. Nxh5 d3 41. Re1 Rd4 42. Kg2 Rxb4 43. Kf3 Rb5 44. Nf4 Rxc5 45. Nxd3 Rf5+ 46. Kg4 Rxf6 47. Re7 { 1-0 White wins. } 1-0