Jan Joris Groenewold
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Dutch League 2015-16 | 09/26/2015 | 2327 | Netherlands |
| Cafe Atlantis Masters | 08/08/2011 | 2315 | Netherlands |
| 4th Paleohora Open | 07/20/2011 | 2310 | Greece |
| Open A | 12/21/2009 | 2327 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| E90 | King's Indian, 5.Nf3 | 4 games |
| E01 | Catalan, closed | 4 games |
| E04 | Catalan, open, 5.Nf3 | 3 games |
| A57 | Benko gambit | 3 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B46 | Sicilian, Taimanov variation | 7 games |
| B22 | Sicilian, Alapin's variation (2.c3) | 4 games |
| B41 | Sicilian, Kan variation | 3 games |
| C41 | Philidor's defence | 3 games |
Netherlands
Male
FIDE ID:

Greece