J Kostelny
- Games
- 2
Biography
No biography available yet.
Playing style
No playing style notes available yet.
Famous games
No featured games curated yet.
Recent games
| Date | Color | Opponent | Result |
|---|---|---|---|
| 2025-10-19 | Moritz Valentin Collin(2282) | 1-0 | |
| 2025-07-17 | Adam Frank(2384) | 0-1 |