Event: Round 4: Ostrovskiy, Aleksandr - Sosa, Tomas
Date: 2025-04-24
White: Ostrovskiy, Aleksandr
WhiteTitle: IM
WhiteElo: 2394
Black: Sosa, Tomas
BlackTitle: GM
BlackElo: 2498
Result: 0-1
ECO: B27
Opening: Sicilian Defense: Hyperaccelerated Dragon
Variant: Standard
TimeControl: 90+30

1. e4 { [%eval 0.18] [%clk 1:23:38] } 1... c5 { [%eval 0.25] [%clk 1:30:12] } 2. Nf3 { [%eval 0.2] [%clk 1:23:53] } 2... g6 { [%eval 0.34] [%clk 1:30:35] } 3. c3 { [%eval 0.24] [%clk 1:20:19] } 3... d5 { [%eval 0.28] [%clk 1:27:21] } 4. exd5 { [%eval 0.37] [%clk 1:17:23] } 4... Qxd5 { [%eval 0.2] [%clk 1:27:43] } 5. d4 { [%eval 0.18] [%clk 1:17:46] } 5... Bg7 { [%eval 0.25] [%clk 1:22:32] } 6. Nbd2 { [%eval 0.24] [%clk 1:16:41] } 6... Nf6 { [%eval 0.31] [%clk 1:09:49] } 7. Bc4 { [%eval 0.28] [%clk 1:12:34] } 7... Qf5 { [%eval 0.5] [%clk 1:05:09] } 8. O-O { [%eval 0.36] [%clk 1:05:16] } 8... O-O { [%eval 0.32] [%clk 1:00:23] } 9. Re1 { [%eval 0.32] [%clk 0:57:42] } 9... Nc6 { [%eval 0.32] [%clk 0:53:09] } 10. Nb3 { [%eval 0.34] [%clk 0:55:05] } 10... cxd4 { [%eval 0.36] [%clk 0:51:28] } 11. Nbxd4 { [%eval 0.35] [%clk 0:54:41] } 11... Nxd4 { [%eval 0.47] [%clk 0:50:54] } 12. Qxd4 { [%eval 0.43] [%clk 0:46:09] } 12... Ng4 { [%eval 0.45] [%clk 0:48:24] } 13. Qd5 { [%eval 0.1] [%clk 0:32:18] } 13... Qxd5 { [%eval 0.18] [%clk 0:45:22] } 14. Bxd5 { [%eval 0.16] [%clk 0:32:30] } 14... e6 { [%eval 0.18] [%clk 0:45:45] } 15. Bb3 { [%eval 0.1] [%clk 0:32:24] } 15... b6 { [%eval 0.18] [%clk 0:45:07] } 16. h3 { [%eval 0.17] [%clk 0:31:09] } 16... Nf6 { [%eval 0.23] [%clk 0:44:57] } 17. Ne5 { [%eval 0.2] [%clk 0:30:29] } 17... Bb7 { [%eval 0.24] [%clk 0:40:30] } 18. Nxf7 { [%eval -0.21] [%clk 0:20:14] } 18... Rxf7 { [%eval -0.19] [%clk 0:40:09] } 19. Bxe6 { [%eval -0.14] [%clk 0:20:42] } 19... Bd5 { [%eval -0.09] [%clk 0:27:46] } 20. Bxf7+ { [%eval -0.25] [%clk 0:21:00] } 20... Bxf7 { [%eval 0.0] [%clk 0:28:09] } 21. Bf4 { [%eval 0.0] [%clk 0:17:52] } 21... a5 { [%eval -0.03] [%clk 0:27:02] } 22. Be5 { [%eval -0.01] [%clk 0:16:24] } 22... a4 { [%eval 0.0] [%clk 0:24:43] } 23. Rad1 { [%eval -0.38] [%clk 0:13:23] } 23... Bxa2 { [%eval -0.37] [%clk 0:20:48] } 24. Bxf6 { [%eval -0.31] [%clk 0:06:31] } 24... Bxf6 { [%eval -0.23] [%clk 0:21:11] } 25. Rd6 { [%eval -0.27] [%clk 0:06:57] } 25... Bg7 { [%eval -0.18] [%clk 0:16:50] } 26. Rxb6 { [%eval -0.18] [%clk 0:07:21] } 26... Rd8 { [%eval -0.2] [%clk 0:17:10] } 27. Rb7 { [%eval -0.18] [%clk 0:06:35] } 27... Bf8 { [%eval -0.21] [%clk 0:14:51] } 28. h4 { [%eval -0.23] [%clk 0:01:05] } 28... Bb3 { [%eval -0.34] [%clk 0:13:53] } 29. h5?! { [%eval -0.9] } { Inaccuracy. Ra7 was best. } { [%clk 0:01:06] } 29... gxh5 { [%eval -0.6] [%clk 0:13:58] } 30. Rb5 { [%eval -1.02] [%clk 0:00:48] } 30... h6?! { [%eval 0.0] } { Inaccuracy. Rd2 was best. } { [%clk 0:10:50] } 31. Rxh5 { [%eval -0.06] [%clk 0:01:04] } 31... Rd2 { [%eval -0.03] [%clk 0:11:09] } 32. Ra5 { [%eval 0.0] [%clk 0:00:50] } 32... Rxb2 { [%eval 0.0] [%clk 0:10:34] } 33. Ra1?! { [%eval -0.87] } { Inaccuracy. Ra8 was best. } { [%clk 0:00:39] } 33... Bd6?! { [%eval -0.27] } { Inaccuracy. Rd2 was best. } { [%clk 0:07:49] } 34. g3? { [%eval -1.92] } { Mistake. Kf1 was best. } { [%clk 0:00:32] } 34... a3 { [%eval -1.68] [%clk 0:07:23] } 35. Rb5?? { [%eval -3.85] } { Blunder. R1xa3 was best. } { [%clk 0:00:32] } 35... Bc4 { [%eval -3.82] [%clk 0:07:14] } 36. Ra5 { [%eval -3.82] [%clk 0:00:33] } 36... a2 { [%eval -3.7] [%clk 0:07:20] } 37. Kg2 { [%eval -3.82] [%clk 0:00:32] } 37... Kf7 { [%eval -3.53] [%clk 0:06:15] } 38. Rd1 { [%eval -4.02] [%clk 0:00:37] } 38... Ke6 { [%eval -3.99] [%clk 0:04:54] } 39. Rd4 { [%eval -4.8] [%clk 0:00:56] } 39... Bb5?! { [%eval -3.57] } { Inaccuracy. Bc7 was best. } { [%clk 0:04:03] } 40. Rh4 { [%eval -3.5] [%clk 0:00:42] } 40... Bc6+ { [%eval -2.88] [%clk 0:03:21] } 41. Kh3 { [%eval -2.85] [%clk 0:01:10] } 41... Bf8 { [%eval -2.78] [%clk 0:01:16] } 42. Ra6 { [%eval -2.56] [%clk 0:01:03] } 42... Kd7?? { [%eval -0.21] } { Blunder. Kf7 was best. } { [%clk 0:01:21] } 43. Rd4+?? { [%eval -2.97] } { Blunder. Rh5 was best. } { [%clk 0:01:21] } 43... Bd6?? { [%eval -0.54] } { Blunder. Ke8 was best. } { [%clk 0:00:38] } 44. Ra7+ { [%eval -0.96] [%clk 0:00:51] } 44... Ke6 { [%eval -0.99] [%clk 0:01:07] } 45. Rh4?? { [%eval -2.91] } { Blunder. Ra6 was best. } { [%clk 0:01:10] } 45... Bf8 { [%eval -2.75] [%clk 0:00:41] } 46. Ra6 { [%eval -2.41] [%clk 0:01:39] } 46... Kd7?? { [%eval -0.46] } { Blunder. Kf7 was best. } { [%clk 0:00:40] } 47. Rd4+?? { [%eval -3.38] } { Blunder. Rh5 was best. } { [%clk 0:02:07] } 47... Ke8 { [%eval -3.4] [%clk 0:00:39] } 48. Rc4 { [%eval -3.33] [%clk 0:00:42] } 48... Bb7?? { [%eval 0.0] } { Blunder. Bb5 was best. } { [%clk 0:00:50] } 49. Ra5? { [%eval -1.55] } { Mistake. Ra7 was best. } { [%clk 0:00:40] } 49... Rb1? { [%eval 0.0] } { Mistake. Rxf2 was best. } { [%clk 0:00:44] } 50. Rxa2 { [%eval 0.0] [%clk 0:00:34] } 50... Bf3 { [%eval 0.0] [%clk 0:01:06] } 51. Re2+ { [%eval 0.0] [%clk 0:00:35] } 51... Kd7 { [%eval 0.0] [%clk 0:00:39] } 52. Rd2+ { [%eval 0.0] [%clk 0:00:43] } 52... Bd6 { [%eval 0.0] [%clk 0:00:38] } 53. Rxd6+ { [%eval 0.0] [%clk 0:01:00] } 53... Kxd6 { [%eval 0.0] [%clk 0:01:08] } 54. g4 { [%eval 0.0] [%clk 0:01:06] } 54... Rg1 { [%eval 0.0] [%clk 0:00:38] } 55. Rf4 { [%eval 0.0] [%clk 0:01:18] } 55... Bb7 { [%eval 0.0] [%clk 0:00:34] } 56. f3 { [%eval 0.0] [%clk 0:00:34] } 56... Ke7 { [%eval 0.0] [%clk 0:00:57] } 57. Rf5 { [%eval 0.0] [%clk 0:00:35] } 57... Rc1 { [%eval -0.07] [%clk 0:00:54] } 58. Kh4 { [%eval -0.03] [%clk 0:00:36] } 58... Rxc3 { [%eval 0.0] [%clk 0:00:45] } 59. Rh5 { [%eval 0.07] [%clk 0:00:51] } 59... Rc6 { [%eval 0.01] [%clk 0:00:39] } 60. g5 { [%eval 0.0] [%clk 0:00:56] } 60... hxg5+ { [%eval 0.0] [%clk 0:00:49] } 61. Rxg5 { [%eval 0.0] [%clk 0:01:18] } 61... Kf6 { [%eval 0.0] [%clk 0:00:54] } 62. Rg4 { [%eval 0.0] [%clk 0:01:24] } 62... Rc3 { [%eval 0.0] [%clk 0:01:11] } 63. Rf4+ { [%eval 0.0] [%clk 0:01:16] } 63... Ke5 { [%eval 0.0] [%clk 0:01:28] } 64. Kg4 { [%eval 0.0] [%clk 0:00:58] } 64... Rc1 { [%eval 0.0] [%clk 0:01:06] } 65. Rf5+ { [%eval 0.0] [%clk 0:01:22] } 65... Ke6 { [%eval -0.03] [%clk 0:01:32] } 66. Rb5 { [%eval 0.0] [%clk 0:01:25] } 66... Bd5 { [%eval -0.05] [%clk 0:01:13] } 67. Rb8 { [%eval 0.0] [%clk 0:01:22] } 67... Rg1+ { [%eval -0.09] [%clk 0:00:53] } 68. Kf4 { [%eval -0.09] [%clk 0:01:47] } 68... Rf1 { [%eval -0.18] [%clk 0:01:13] } 69. Rb6+ { [%eval -0.35] [%clk 0:02:13] } 69... Kd7 { [%eval -0.22] [%clk 0:01:29] } 70. Ke5 { [%eval -0.34] [%clk 0:02:27] } 70... Bxf3 { [%eval -0.28] [%clk 0:01:42] } 71. Rh6 { [%eval -0.02] [%clk 0:02:05] } 71... Re1+ { [%eval -0.23] [%clk 0:01:59] } 72. Kd4 { [%eval -0.43] [%clk 0:02:24] } 72... Kc7 { [%eval -0.37] [%clk 0:02:00] } 73. Rf6 { [%eval -0.45] [%clk 0:02:25] } 73... Bc6 { [%eval -0.29] [%clk 0:02:18] } 74. Rf7+ { [%eval -0.24] [%clk 0:02:45] } 74... Kb6 { [%eval -0.37] [%clk 0:02:43] } 75. Rf6 { [%eval -0.32] [%clk 0:03:05] } 75... Re4+ { [%eval -0.26] [%clk 0:03:08] } 76. Kd3 { [%eval -0.15] [%clk 0:03:29] } 76... Rg4 { [%eval -0.11] [%clk 0:03:16] } 77. Ke3 { [%eval -0.25] [%clk 0:02:55] } 77... Kc5 { [%eval -0.07] [%clk 0:03:39] } 78. Rf5+ { [%eval 0.0] [%clk 0:03:00] } 78... Bd5 { [%eval 0.0] [%clk 0:04:05] } 79. Rf4 { [%eval 0.0] [%clk 0:03:28] } 79... Rg3+ { [%eval 0.0] [%clk 0:04:30] } 80. Kd2 { [%eval 0.0] [%clk 0:03:54] } 80... Bc4 { [%eval 0.0] [%clk 0:04:24] } 81. Rf5+ { [%eval 0.0] [%clk 0:03:51] } 81... Kd4 { [%eval 0.0] [%clk 0:04:07] } 82. Rf4+ { [%eval 0.0] [%clk 0:04:16] } 82... Kd5 { [%eval 0.0] [%clk 0:04:33] } 83. Rh4 { [%eval 0.0] [%clk 0:03:32] } 83... Bd3 { [%eval 0.0] [%clk 0:04:58] } 84. Rh5+ { [%eval 0.0] [%clk 0:01:49] } 84... Kd4 { [%eval 0.0] [%clk 0:05:20] } 85. Rh2 { [%eval 0.0] [%clk 0:02:09] } 85... Rg1 { [%eval 0.0] [%clk 0:05:08] } 86. Rf2 { [%eval 0.0] [%clk 0:02:05] } 86... Ra1 { [%eval 0.0] [%clk 0:04:41] } 87. Rf4+ { [%eval 0.0] [%clk 0:02:32] } 87... Be4 { [%eval 0.0] [%clk 0:05:06] } 88. Rf2 { [%eval 0.0] [%clk 0:02:59] } 88... Ra2+ { [%eval 0.0] [%clk 0:04:43] } 89. Ke1 { [%eval 0.0] [%clk 0:03:27] } 89... Ra3 { [%eval 0.0] [%clk 0:04:48] } 90. Kd2 { [%eval 0.0] [%clk 0:01:50] } 90... Bf3 { [%eval 0.0] [%clk 0:05:10] } 91. Ke1 { [%eval 0.0] [%clk 0:01:17] } 91... Ke3 { [%eval 0.0] [%clk 0:05:09] } 92. Re2+ { [%eval 0.0] [%clk 0:01:45] } 92... Kf4 { [%eval 0.0] [%clk 0:05:32] } 93. Rb2 { [%eval 0.0] [%clk 0:01:51] } 93... Rd3 { [%eval 0.0] [%clk 0:05:46] } 94. Rd2 { [%eval 0.0] [%clk 0:01:40] } 94... Re3+ { [%eval 0.0] [%clk 0:05:48] } 95. Kf2 { [%eval 0.0] [%clk 0:01:59] } 95... Ra3 { [%eval 0.0] [%clk 0:05:05] } 96. Rb2 { [%eval 0.0] [%clk 0:01:22] } 96... Ra1 { [%eval 0.0] [%clk 0:05:22] } 97. Rb4+ { [%eval 0.0] [%clk 0:01:05] } 97... Be4 { [%eval 0.0] [%clk 0:05:51] } 98. Rb2 { [%eval 0.0] [%clk 0:01:34] } 98... Rh1 { [%eval 0.0] [%clk 0:06:10] } 99. Rd2 { [%eval 0.0] [%clk 0:01:20] } 99... Rh3 { [%eval 0.0] [%clk 0:06:18] } 100. Ke1 { [%eval 0.0] [%clk 0:00:55] } 100... Bd3 { [%eval 0.0] [%clk 0:06:07] } 101. Rb2 { [%eval 0.0] [%clk 0:00:43] } 101... Ke3 { [%eval 0.0] [%clk 0:05:52] } 102. Re2+ { [%eval 0.0] [%clk 0:01:09] } 102... Kd4 { [%eval 0.0] [%clk 0:06:18] } 103. Rf2 { [%eval 0.0] [%clk 0:00:38] } 103... Kc3 { [%eval 0.0] [%clk 0:06:47] } 104. Rg2 { [%eval 0.0] [%clk 0:00:37] } 104... Rf3 { [%eval 0.0] [%clk 0:07:02] } 105. Rf2?? { [%eval #-11] } { Checkmate is now unavoidable. Rg1 was best. } { [%clk 0:00:41] } 105... Re3+ { [%eval #-10] [%clk 0:07:31] } 106. Kd1 { [%eval #-10] [%clk 0:01:10] } 106... Rg3 { [%eval #-9] [%clk 0:07:30] } 0-1