Male
FIDE ID:
Jan Willem De Jong
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Dutch League 2025-26 | 09/20/2025 | 2345 |  Netherlands |
| 40th ECC Open 2025 | 10/19/2025 | 2309 |  Greece |
| Dutch League 2024-25 | 09/21/2024 | 2267 | Netherlands |
| 39th ECC Open 2024 | 10/20/2024 | 2410 |  Serbia |
Most Played Openings as White
| ECO | Opening | Games |
| E32 | Nimzo-Indian, classical variation | 7 games |
| D35 | Queen's Gambit Declined, 3...Nf6 | 7 games |
| E20 | Nimzo-Indian defence | 6 games |
| B07 | Pirc defence | 6 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C45 | Scotch game | 12 games |
| B02 | Alekhine's defence | 10 games |
| C55 | Two knights defence | 8 games |
| C80 | Ruy Lopez, open (Tarrasch) defence | 7 games |
