| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. A Ostrovskiy vs D Schuh |
| 1-0 | 63 | 2007 | Czech Open-A | C11 French |
| 27. V Yandemirov vs A Ostrovskiy |
| ½-½ | 50 | 2007 | Czech Open-A | C68 Ruy Lopez, Exchange |
| 28. A Ostrovskiy vs S Bromberger |
| ½-½ | 34 | 2007 | Czech Open-A | B92 Sicilian, Najdorf, Opocensky Variation |
| 29. A Gavrilov vs A Ostrovskiy |
| 1-0 | 35 | 2007 | Czech Open-A | E15 Queen's Indian |
| 30. A Ostrovskiy vs P Cerveny |
| 1-0 | 54 | 2007 | Czech Open-A | B42 Sicilian, Kan |
| 31. J Markos vs A Ostrovskiy |
| 1-0 | 32 | 2007 | Czech Open-A | E15 Queen's Indian |
| 32. Khismatullin vs A Ostrovskiy |
| 1-0 | 39 | 2008 | Inautomarket Open | E32 Nimzo-Indian, Classical |
| 33. A Ostrovskiy vs E Borisova |
| 1-0 | 34 | 2008 | Inautomarket Open | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 34. A Zhigalko vs A Ostrovskiy |
| 1-0 | 33 | 2008 | Inautomarket Open | C93 Ruy Lopez, Closed, Smyslov Defense |
| 35. A Ostrovskiy vs V Matviishen |
| 1-0 | 22 | 2014 | 11th Vasylyshyn GM | B01 Scandinavian |
| 36. A Ostrovskiy vs V Zakhartsov |
| ½-½ | 56 | 2014 | 11th Vasylyshyn GM | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 37. A Ostrovskiy vs M Kazakov |
| ½-½ | 56 | 2014 | 11th Vasylyshyn GM | C95 Ruy Lopez, Closed, Breyer |
| 38. V Matviishen vs A Ostrovskiy |
| ½-½ | 18 | 2015 | 12th Vasylyshyn GM | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 39. A Ostrovskiy vs V Zakhartsov |
| ½-½ | 46 | 2015 | 12th Vasylyshyn GM | B90 Sicilian, Najdorf |
| 40. M Kazakov vs A Ostrovskiy |
| ½-½ | 58 | 2015 | 12th Vasylyshyn GM | C93 Ruy Lopez, Closed, Smyslov Defense |
| 41. A Ostrovskiy vs O Bortnyk |
| 1-0 | 47 | 2015 | 12th Vasylyshyn GM | B04 Alekhine's Defense, Modern |
| 42. A Ostrovskiy vs L Engel |
| 1-0 | 44 | 2016 | Hamburg HSK IM | B92 Sicilian, Najdorf, Opocensky Variation |
| 43. Movsesian vs A Ostrovskiy |
| ½-½ | 49 | 2017 | PRO League Group Stage | C50 Giuoco Piano |
| 44. Mikhalevski vs A Ostrovskiy |
| 1-0 | 41 | 2017 | PRO League Group Stage | A14 English |
| 45. B Deac vs A Ostrovskiy |
| 0-1 | 34 | 2017 | 8th Pfalz Open | C50 Giuoco Piano |
| 46. B Deac vs A Ostrovskiy |
| 0-1 | 34 | 2017 | 8th Pfalz Open | C50 Giuoco Piano |
| 47. A Ostrovskiy vs Indjic |
| 0-1 | 82 | 2017 | GRENKE Chess Open | B90 Sicilian, Najdorf |
| 48. J Paul vs A Ostrovskiy |
| 0-1 | 43 | 2017 | GRENKE Chess Open | E32 Nimzo-Indian, Classical |
| 49. Vocaturo vs A Ostrovskiy |
| 0-1 | 69 | 2017 | Bundesliga 2017/18 | C53 Giuoco Piano |
| 50. A Ostrovskiy vs Z Almasi |
| ½-½ | 27 | 2017 | Bundesliga 2017/18 | B90 Sicilian, Najdorf |
Kibitzing
