| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 76. I Beradze vs A Ostrovskiy |
| ½-½ | 150 | 2021 | CCCSA Labor Day GMA | A07 King's Indian Attack |
| 77. A Ostrovskiy vs B Jacobson |
| 0-1 | 83 | 2021 | SPICE Cup Open | C75 Ruy Lopez, Modern Steinitz Defense |
| 78. A Ostrovskiy vs S Homa |
| ½-½ | 53 | 2022 | 50th Annual World Open | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 79. A Kaliksteyn vs A Ostrovskiy |
| ½-½ | 29 | 2022 | New York Summer Invitational | D02 Queen's Pawn Game |
| 80. A Ostrovskiy vs D Khamrakulov |
| 0-1 | 45 | 2022 | New York Summer Invitational | B12 Caro-Kann Defense |
| 81. A Saric vs A Ostrovskiy |
| 1-0 | 59 | 2022 | New York Summer Invitational | E11 Bogo-Indian Defense |
| 82. A Ostrovskiy vs K Dragun |
| 0-1 | 32 | 2022 | New York Summer Invitational | B42 Sicilian, Kan |
| 83. M Song vs A Ostrovskiy |
| 1-0 | 42 | 2022 | New York Summer Invitational | D32 Queen's Gambit Declined, Tarrasch |
| 84. L Zhou vs A Ostrovskiy |
| 0-1 | 53 | 2022 | New York Summer Invitational | C63 Ruy Lopez, Schliemann Defense |
| 85. A Ostrovskiy vs J D Williams |
| 0-1 | 35 | 2022 | New York Summer Invitational | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 86. M Lu vs A Ostrovskiy |
| 1-0 | 34 | 2022 | New York Summer Invitational | E11 Bogo-Indian Defense |
| 87. A Ostrovskiy vs K Korley |
| ½-½ | 16 | 2022 | New York Summer Invitational | C42 Petrov Defense |
| 88. L Jiang vs A Ostrovskiy |
| 1-0 | 47 | 2022 | Hollywood Norm Classic #3 | B12 Caro-Kann Defense |
| 89. A Ostrovskiy vs S Homa |
| ½-½ | 25 | 2023 | 1000GM Vegas Super Swiss | C48 Four Knights |
| 90. Shimanov vs A Ostrovskiy |
| ½-½ | 43 | 2023 | Qatar Masters Open | D30 Queen's Gambit Declined |
| 91. A Ostrovskiy vs E Can |
| ½-½ | 37 | 2023 | Qatar Masters Open | B30 Sicilian |
| 92. R Makarian vs A Ostrovskiy |
| 1-0 | 62 | 2023 | Qatar Masters Open | E10 Queen's Pawn Game |
| 93. B Bellahcene vs A Ostrovskiy |
| 1-0 | 78 | 2023 | Qatar Masters Open | C77 Ruy Lopez |
| 94. A Ostrovskiy vs M Tissir |
| ½-½ | 46 | 2023 | Qatar Masters Open | B45 Sicilian, Taimanov |
| 95. K Tomaszewski vs A Ostrovskiy |
| 0-1 | 35 | 2023 | Qatar Masters Open | E21 Nimzo-Indian, Three Knights |
| 96. A Ostrovskiy vs I Msellek |
| 0-1 | 37 | 2023 | Qatar Masters Open | B45 Sicilian, Taimanov |
| 97. A Ostrovskiy vs Y Liu |
| 1-0 | 26 | 2023 | Qatar Masters Open | C11 French |
| 98. R Lagunow vs A Ostrovskiy |
| 0-1 | 57 | 2023 | Qatar Masters Open | C44 King's Pawn Game |
| 99. G Huston vs A Ostrovskiy |
| 0-1 | 48 | 2024 | 1000GM NY Winter GMA | B12 Caro-Kann Defense |
| 100. K Korley vs A Ostrovskiy |
| ½-½ | 35 | 2024 | 1000GM NY Winter GMA | E24 Nimzo-Indian, Samisch |
Kibitzing
