Henk G Seijen
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Groningen op | 04/13/2007 | 869 | Netherlands |
| Groningen Harmonie Mini | 12/26/2004 | 724 | Netherlands |
| Hoogeveen Essent Amateur | 10/15/2004 | 229 | Netherlands |
| Groningen Harmonie Mini op-B | 12/26/2002 | 1795 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| B42 | Sicilian, Kan, 5.Bd3 | 2 games |
| B02 | Alekhine's defence | 1 games |
| C12 | French, MacCutcheon variation | 1 games |
| B12 | Caro-Kann defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| A68 | Benoni, four pawns attack | 1 games |
| B31 | Sicilian, Nyezhmetdinov-Rossolimo attack (with ...g6, without ...d6) | 1 games |
| E81 | King's Indian, Saemisch, 5...O-O | 1 games |


Netherlands