Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. A Kostin vs Vladimir Provkin |
| 0-1 | 41 | 2010 | Voronezh Region-ch | B50 Sicilian |
2. A Kostin vs Artiom Golovchanov |
| 1-0 | 25 | 2010 | Voronezh Region-ch | B50 Sicilian |
3. A Kostin vs Vladislav Aliev |
| 1-0 | 28 | 2012 | Astrakhan op | B50 Sicilian |
4. A Kostin vs D Prokopenko |
| 1-0 | 32 | 2013 | Kaluga Tsiolkovsky Memorial op | B50 Sicilian |