Jan Greben
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Pretoria Waterglen sim | 10/03/2001 | 535 | South Africa |
| NWC March | 03/??/1980 | 0 | Canada |
| NWC July op | 07/??/1980 | 245 | United States |
| NWC September op | 09/??/1980 | 372 | United States |
Most Played Openings as White
| ECO | Opening | Games |
| B35 | Sicilian, accelerated fianchetto, modern variation with Bc4 | 1 games |
| C67 | Ruy Lopez, Berlin defence, open variation | 1 games |
| C18 | French, Winawer, advance variation | 1 games |
| B78 | Sicilian, dragon, Yugoslav attack, 10.O-O-O | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C65 | Ruy Lopez, Berlin defence | 2 games |
| C91 | Ruy Lopez, closed, 9.d4 | 1 games |
| B39 | Sicilian, accelerated fianchetto, Breyer variation | 1 games |
| A05 | Reti opening | 1 games |


South Africa
Canada
United States