J. Van den Berg
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Zwolle Windesheim op-B | 03/19/2004 | 64 | Netherlands |
| Groningen Harmonie Mini op-D | 12/26/2002 | 1171 | Netherlands |
| Haarlem op | ??/??/1995 | 740 | Netherlands |
| NED-ch U12 | ??/??/1995 | 158 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| E93 | King's Indian, Petrosian system, main line | 1 games |
| D55 | Queen's Gambit Declined, 6.Nf3 | 1 games |
| B96 | Sicilian, Najdorf, 7.f4 | 1 games |
| B30 | Sicilian defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C50 | King's pawn game | 2 games |
| B05 | Alekhine's defence, modern variation, 4...Bg4 | 1 games |
| B30 | Sicilian defence | 1 games |
| A11 | English, Caro-Kann defensive system | 1 games |


Netherlands