Jon I Horni Nielsen
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| 46th Olympiad 2026 | 09/16/2026 | 2075 | Uzbekistan |
| Slovakia Chess Open 2023 | 07/11/2023 | 2251 | Slovakia |
Most Played Openings as White
| ECO | Opening | Games |
| B19 | Caro-Kann, classical, 7...Nd7 | 2 games |
| C78 | Ruy Lopez, 5.O-O | 2 games |
| B28 | Sicilian, O'Kelly variation | 1 games |
| B41 | Sicilian, Kan variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C45 | Scotch game | 2 games |
| E17 | Queen's Indian, 5.Bg2 Be7 | 2 games |
| A01 | Nimzovich-Larsen attack | 1 games |
| C91 | Ruy Lopez, closed, 9.d4 | 1 games |
Male
FIDE ID:

Uzbekistan
Slovakia