Ukraine
Male
FIDE ID:
Viktor Matviishen
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| 14th New York Int 2026 | 07/15/2026 | 2295 |  United States |
| 35th Chicago Open 2026 | 05/21/2026 | 2352 | United States |
| Charlotte Spring GMA 2026 | 03/18/2026 | 2394 | United States |
| Saint Louis Masters 2026 | 02/25/2026 | 2477 | United States |
Most Played Openings as White
| ECO | Opening | Games |
| D85 | Gruenfeld, exchange variation | 11 games |
| E73 | King's Indian, 5.Be2 | 8 games |
| D35 | Queen's Gambit Declined, 3...Nf6 | 8 games |
| D10 | Queen's Gambit Declined Slav defence | 8 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B90 | Sicilian, Najdorf | 15 games |
| E15 | Queen's Indian, 4.g3 | 9 games |
| C47 | Four knights, Scotch variation | 6 games |
| B51 | Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack | 5 games |
