[Event "Round 9: Chavarria Troya, Keytleen Denis - Yu, Allyson"] [Site "https://lichess.org/broadcast/xv-campeonato-panamericano-u7-u17-de-ajedrez-2026--g15/round-9/JL1gtFdJ/hD2FaCsb"] [Date "2026.05.17"] [Round "9"] [White "Chavarria Troya, Keytleen Denis"] [Black "Yu, Allyson"] [Result "0-1"] [WhiteElo "1870"] [WhiteTitle "WCM"] [WhiteFideId "6608345"] [BlackElo "1838"] [BlackTitle "WCM"] [BlackFideId "39930572"] [TimeControl "90+30"] [Variant "Standard"] [ECO "B45"] [Opening "Sicilian Defense: Four Knights Variation, Cobra Variation"] [StudyName "XV Campeonato Panamericano U7 - U17 de Ajedrez 2026"] [ChapterName "Chavarria Troya, Keytleen Denis - Yu, Allyson"] [ChapterURL "https://lichess.org/study/aLQX14OS/fnCW5wCS"] [Annotator "https://lichess.org/@/ChessLifeOnline"] [Orientation "white"] { Annotations by Allyson Yu. } 1. e4 { [%clk 1:30:46] } 1... c5 { [%clk 1:30:53] } 2. Nf3 { [%clk 1:30:53] } 2... Nc6 { [%clk 1:31:18] } 3. d4 { [%clk 1:30:53] } 3... cxd4 { [%clk 1:31:42] } 4. Nxd4 { [%clk 1:31:16] } 4... Nf6 { [%clk 1:32:04] } 5. Nc3 { [%clk 1:31:34] } 5... e6 { [%clk 1:32:29] } 6. Ndb5 { [%clk 1:30:54] } 6... Bc5 { [%clk 1:32:48] } 7. Nd6+ { [%clk 1:30:10] } 7... Ke7 { [%clk 1:33:05] } 8. Bf4 { [%clk 1:29:33] } 8... e5 { [%clk 1:33:03] } 9. Nf5+ { [%clk 1:29:52] } 9... Kf8 { [%clk 1:33:24] } 10. Be3 { [%clk 1:15:09] } 10... Bb4 { [%clk 1:33:30] } 11. a3 { Here, I was already out of my preparation. I knew this move was common, so I just tried to play sensibly. } { [%clk 0:49:07] } 11... Bxc3+ { [%clk 1:32:05] } 12. bxc3 { [%clk 0:49:23] } 12... d5 { [%clk 1:30:56] } 13. Bc5+? $36 { This move seemed like the wrong idea, since the dark-squared bishop can be kicked away so easily. } { [%clk 0:44:00] } (13. exd5 Nxd5 14. Bc4 Nxe3 15. Qxd8+ Nxd8 16. Nxe3 Be6 { would be more solid. }) 13... Kg8 { [%clk 1:29:52] } 14. exd5 { [%clk 0:31:34] } 14... Nxd5 { [%clk 1:23:12] } 15. Nd6 { [%clk 0:32:42] } 15... Be6 { This position is already very difficult to play for White. It looks losing in a way, but there is an interesting resource... } { [%clk 1:17:28] } 16. Nxb7? { I could tell this move is a mistake. It was slow, and with no development. It was just simply unreasonable. } { [%clk 0:27:42] } (16. Qf3 { is the most reasonable, and the simplest option in my opinion. } 16... b6 17. Bc4 Nce7 18. Bb4 a5 19. Nxf7! { The position is still almost equal here. } 19... Qc7 (19... Bxf7? 20. Bxe7 Qxe7 21. Bxd5 $16) 20. Bxe7 Qxc4 21. Nd8 $13 { White has a lot of counterplay for the pawn. }) 16... Qc7 { [%clk 1:15:16] } 17. c4 { [%clk 0:23:38] } 17... Nb6 { [%clk 1:07:21] } 18. Nd6 { [%clk 0:19:54] } 18... Rd8 { [%clk 1:06:52] } 19. Qf3 { [%clk 0:18:09] } 19... Na4?! { [%clk 1:03:14] } (19... Rxd6! { This move also looked very tempting and promising, but I didn't know whether it was necessary. Obviously, two minor pieces are significantly better than a rook in such positions, and White's weak pawn structure and slow piece development only made it more winning, but I decided on 19. ... Na4, though objectively worse. During the game, I thought that I could win a clean piece for a pawn, but was mistaken. } 20. Bxd6 Qxd6 21. Rd1 Nd4 22. Qc3 Na4 $19 { Black is dominating. }) 20. Nb5 { [%clk 0:13:45] } 20... Qd7 { [%clk 0:58:49] } 21. Bd3? { [%clk 0:03:47] } (21. Be3 $7 { after this, I saw } 21... a6 { , but at least White can complicate things a little: } 22. Rd1 Qxd1+ 23. Qxd1 Rxd1+ 24. Kxd1 axb5 25. cxb5 Na5 { White is losing, but fighting at least. }) 21... Nxc5 { [%clk 0:57:54] } 22. O-O { With White down a piece, the rest is just a matter of technique. } { [%clk 0:03:26] } 22... Nxd3 { [%clk 0:55:32] } 23. cxd3 { [%clk 0:03:53] } 23... a6 { [%clk 0:52:53] } 24. Nc3 { [%clk 0:04:11] } 24... h6 { [%clk 0:52:01] } 25. h3 { [%clk 0:03:38] } 25... Kh7 { [%clk 0:50:55] } 26. Rfd1 { [%clk 0:03:37] } 26... Rhe8 { [%clk 0:50:15] } 27. Ne4 { [%clk 0:03:40] } 27... Nd4 { [%clk 0:49:40] } 28. Qh5 { [%clk 0:03:25] } 28... Kg8 { [%clk 0:49:38] } 29. Nc5 { [%clk 0:02:13] } 29... Qc6 { [%clk 0:48:41] } 30. Nxe6 { [%clk 0:02:03] } 30... Rxe6 { [%clk 0:48:54] } 31. Qh4 { [%clk 0:01:34] } 31... Rc8 { [%clk 0:45:54] } 32. Kh2 { [%clk 0:01:11] } 32... Rg6 { [%clk 0:46:00] } 33. Qe4 { [%clk 0:01:03] } 33... Qxe4 { [%clk 0:45:55] } 34. dxe4 { [%clk 0:01:25] } 34... Rxc4 { [%clk 0:45:47] } 35. Rac1 { [%clk 0:01:37] } 35... Rgc6 { [%clk 0:45:54] } 36. Rxc4 { [%clk 0:01:51] } 36... Rxc4 { [%clk 0:46:20] } 37. Rd3 { [%clk 0:01:59] } 37... Kf8 { [%clk 0:46:38] } 38. Kg3 { [%clk 0:01:57] } 38... Rc3 { [%clk 0:46:51] } 39. Rxc3 { [%clk 0:02:10] } 39... Ne2+ { [%clk 0:47:20] } 40. Kf3 { [%clk 0:02:20] } 40... Nxc3 { [%clk 0:47:48] } 41. Ke3 { [%clk 0:02:38] } 41... Ke7 { [%clk 0:48:11] } 42. Kd3 { [%clk 0:03:04] } 42... Nb5 { [%clk 0:48:24] } 43. a4 { [%clk 0:03:10] } 43... Nd6 { [%clk 0:48:12] } 44. f3 { [%clk 0:03:29] } 44... a5 { [%clk 0:48:35] } 45. Kc3 { [%clk 0:03:45] } 45... Kd7 { [%clk 0:48:58] } 46. Kb3 { [%clk 0:03:56] } 46... Kc6 { [%clk 0:49:19] } 47. Kc3 { [%clk 0:04:20] } 47... Kc5 { [%clk 0:49:45] } 48. g3 { [%clk 0:04:27] } 48... f6 { [%clk 0:50:00] } 49. h4 { [%clk 0:04:37] } 49... h5 { [%clk 0:50:17] } 50. Kd3 { [%clk 0:04:35] } 50... Kb4 { [%clk 0:50:34] } 51. f4 { [%clk 0:05:00] } 51... Kxa4 { White resigned here. She is down too much material. } { [%clk 0:50:11] } 0-1