4 games · 2021–2026 · 0 classical · 2 online
Kosakowski 21 draws1 Jumabayev
62.5% for Kosakowski
Openings between them
| B52 | Sicilian Defense: Moscow Variation, Main Line | 1 | 100.0% |
| C07 | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | 1 | 50.0% |
| D78 | Neo-Grünfeld Defense: Classical Variation, Original Defense | 1 | 0.0% |
| E68 | King's Indian Defense: Fianchetto Variation, Classical Variation | 1 | 100.0% |
All games
| Jumabayev, R2565 | 0-1 | Kosakowski, Jakub2543 | Titled Tue 7th Jul 2026 | 2026 |
| Jumabayev, R2556 | 1-0 | Kosakowski, Jakub2542 | Titled Tue 2nd Sep 2025 | 2025 |
| Kosakowski, Jakub2437 | 1-0 | Jumabayev, R2631 | World Blitz 2021 | 2021 |
| Kosakowski, Jakub2437 | ½-½ | Jumabayev, R2631 | World Rapid 2021 | 2021 |