Event: Round 4: Obregon Rivero, Juan Carlos - Starosta, Martyna
Site: https://lichess.org/broadcast/i-campeonato-nacional-e-internacional-de-ajedrez-monterrey-2025--internacional/round-4/N2HNrMYI/aD5DCLkr
Date: 2025-10-16
White: Obregon Rivero, Juan Carlos
WhiteTitle: GM
WhiteElo: 2462
Black: Starosta, Martyna
BlackTitle: WFM
BlackElo: 2185
Result: 1-0
ECO: A21
Opening: English Opening: King's English Variation, Kramnik-Shirov Counterattack
Variant: Standard
TimeControl: 90+30

1. c4 { [%eval 0.12] [%clk 1:24:43] } 1... e5 { [%eval 0.1] [%clk 1:30:55] } 2. Nc3 { [%eval 0.13] [%clk 1:25:00] } 2... Bb4 { [%eval 0.19] [%clk 1:31:19] } 3. Qc2 { [%eval 0.06] [%clk 1:24:33] } 3... Nf6 { [%eval 0.08] [%clk 1:30:14] } 4. Nf3 { [%eval 0.12] [%clk 1:24:51] } 4... Nc6 { [%eval 0.14] [%clk 1:28:42] } 5. e3 { [%eval 0.0] [%clk 1:24:25] } 5... O-O { [%eval 0.19] [%clk 1:25:59] } 6. d3 { [%eval 0.0] [%clk 1:21:31] } 6... Re8 { [%eval 0.0] [%clk 1:23:04] } 7. Bd2 { [%eval 0.0] [%clk 1:17:24] } 7... Bf8 { [%eval 0.06] [%clk 1:16:50] } 8. a3 { [%eval 0.1] [%clk 1:15:34] } 8... d5 { [%eval 0.08] [%clk 1:15:32] } 9. cxd5 { [%eval 0.07] [%clk 1:16:00] } 9... Nxd5 { [%eval 0.05] [%clk 1:15:48] } 10. Be2 { [%eval 0.04] [%clk 1:16:25] } 10... a5 { [%eval 0.07] [%clk 1:10:15] } 11. O-O { [%eval 0.1] [%clk 1:16:17] } 11... Nf6 { [%eval 0.26] [%clk 1:10:28] } 12. Rfd1 { [%eval 0.26] [%clk 1:13:53] } 12... Bf5 { [%eval 0.43] [%clk 1:09:43] } 13. Be1 { [%eval 0.39] [%clk 1:13:50] } 13... Nd7 { [%eval 0.35] [%clk 1:03:27] } 14. b3 { [%eval 0.13] [%clk 1:12:19] } 14... Qe7 { [%eval 0.15] [%clk 0:53:09] } 15. h3 { [%eval 0.05] [%clk 1:10:55] } 15... Nc5 { [%eval 0.08] [%clk 0:49:19] } 16. Nd2 { [%eval 0.06] [%clk 1:06:10] } 16... Rad8 { [%eval 0.24] [%clk 0:45:54] } 17. Nce4 { [%eval 0.34] [%clk 1:04:56] } 17... Ne6 { [%eval 0.39] [%clk 0:32:54] } 18. Nc4 { [%eval 0.36] [%clk 1:03:33] } 18... Ra8 { [%eval 0.41] [%clk 0:33:02] } 19. Ng3 { [%eval 0.44] [%clk 1:02:29] } 19... Bg6 { [%eval 0.45] [%clk 0:33:10] } 20. Bf3 { [%eval 0.38] [%clk 1:02:22] } 20... Ned8 { [%eval 0.71] [%clk 0:24:15] } 21. Ne4 { [%eval 0.38] [%clk 1:02:45] } 21... f5 { [%eval 0.41] [%clk 0:21:57] } 22. Nc3 { [%eval 0.33] [%clk 1:03:02] } 22... e4?! { [%eval 1.16] } { Inaccuracy. f4 was best. } { [%clk 0:21:05] } 23. Be2 { [%eval 1.08] [%clk 1:01:10] } 23... Ne6?! { [%eval 2.02] } { Inaccuracy. exd3 was best. } { [%clk 0:18:01] } 24. d4 { [%eval 2.0] [%clk 1:00:14] } 24... f4 { [%eval 2.16] [%clk 0:08:20] } 25. d5 { [%eval 2.07] [%clk 0:59:03] } 25... f3 { [%eval 1.91] [%clk 0:08:15] } 26. dxc6 { [%eval 2.11] [%clk 0:54:23] } 26... fxe2 { [%eval 2.03] [%clk 0:08:06] } 27. Rd7 { [%eval 2.01] [%clk 0:53:39] } 27... Qf6 { [%eval 2.09] [%clk 0:07:02] } 28. cxb7 { [%eval 2.17] [%clk 0:52:58] } 28... Rab8 { [%eval 2.05] [%clk 0:04:08] } 29. Rb1 { [%eval 2.05] [%clk 0:52:24] } 29... Ng5 { [%eval 2.43] [%clk 0:03:59] } 30. Nxe2 { [%eval 2.55] [%clk 0:49:59] } 30... Nf3+ { [%eval 2.32] [%clk 0:01:44] } 31. Kh1 { [%eval 1.9] [%clk 0:47:26] } 31... Nxe1 { [%eval 1.87] [%clk 0:01:35] } 32. Rxe1 { [%eval 1.84] [%clk 0:46:51] } 32... Qxf2 { [%eval 1.9] [%clk 0:02:02] } 33. Qd1?! { [%eval 1.25] } { Inaccuracy. Rdd1 was best. } { [%clk 0:40:07] } 33... Bh5 { [%eval 1.35] [%clk 0:01:09] } 34. Rd5 { [%eval 1.31] [%clk 0:38:32] } 34... Bf7 { [%eval 1.29] [%clk 0:00:54] } 35. Nf4 { [%eval 0.85] [%clk 0:26:50] } 35... Bxd5? { [%eval 2.48] } { Mistake. Rxb7 was best. } { [%clk 0:01:10] } 36. Qxd5+ { [%eval 2.61] [%clk 0:27:11] } 36... Kh8 { [%eval 2.39] [%clk 0:01:35] } 37. Re2?? { [%eval 0.56] } { Blunder. Rc1 was best. } { [%clk 0:27:13] } 37... Qf1+ { [%eval 0.76] [%clk 0:01:28] } 38. Kh2 { [%eval 0.69] [%clk 0:27:31] } 38... Bd6?? { [%eval 4.36] } { Blunder. Qa1 was best. } { [%clk 0:01:50] } 39. Nxd6 { [%eval 3.87] [%clk 0:27:20] } 39... cxd6 { [%eval 4.32] [%clk 0:02:19] } 40. Rc2 { [%eval 4.11] [%clk 0:26:02] } 40... Qa6 { [%eval 4.09] [%clk 0:02:11] } 41. Rc7 { [%eval 4.27] [%clk 0:25:10] } 41... Qb6 { [%eval 4.24] [%clk 0:01:57] } 42. Qf7 { [%eval 4.25] [%clk 0:22:22] } 42... Rg8 { [%eval 3.83] [%clk 0:02:26] } 43. Qh5?! { [%eval 2.53] } { Inaccuracy. b4 was best. } { [%clk 0:21:11] } 43... d5 { [%eval 2.14] [%clk 0:02:53] } 44. Re7? { [%eval 0.94] } { Mistake. Nxd5 was best. } { [%clk 0:20:10] } 44... Rgf8?? { [%eval 4.19] } { Blunder. d4 was best. } { [%clk 0:01:28] } 45. Qxd5 { [%eval 4.19] [%clk 0:11:03] } 45... Qxe3 { [%eval 3.98] [%clk 0:01:27] } 46. Rxe4?? { [%eval 0.0] } { Blunder. Ne6 was best. } { [%clk 0:10:39] } 46... Qb6 { [%eval 0.0] [%clk 0:01:29] } 47. Ne6 { [%eval 0.0] [%clk 0:10:12] } 47... Rf1?? { [%eval 2.44] } { Blunder. Rfe8 was best. } { [%clk 0:00:52] } 48. Nc5 { [%eval 2.15] [%clk 0:06:07] } 48... Qc7+ { [%eval 2.69] [%clk 0:01:03] } 49. Qe5 { [%eval 2.14] [%clk 0:06:12] } 49... Rf7?? { [%eval 4.76] } { Blunder. Qxe5+ was best. } { [%clk 0:00:59] } 50. Na6 { [%eval 4.69] [%clk 0:05:57] } 50... Qxe5+ { [%eval 4.77] [%clk 0:00:47] } 51. Rxe5 { [%eval 4.84] [%clk 0:06:20] } 51... Rfxb7 { [%eval 4.79] [%clk 0:01:09] } 52. Nxb8 { [%eval 4.73] [%clk 0:06:35] } 52... Rxb8 { [%eval 5.2] [%clk 0:01:32] } 53. Rxa5 { [%eval 5.08] [%clk 0:07:01] } 1-0