| Name: | J. Overmaat |
| Federation: |  |
| Years: | 1997 - 1997 |
| Total Games: | 7 |
| Wins: | 1 (14.29 %) |
| Draws: | 1 (14.29 %) |
| Losses: | 5 (71.43 %) |
| Score: | 21.43 % |
| Tournament | Date | Elo Avg. | Country |
| SBO-ch | ??/??/1997 | 57 |  Netherlands |
| ECO | Opening | Games |
| D30 | Queen's gambit declined | 1 games |
| E10 | Queen's pawn game | 1 games |
| E11 | Bogo-Indian defence | 1 games |
| A85 | Dutch with c4 & Nc3 | 1 games |
| ECO | Opening | Games |
| B32 | Sicilian defence | 1 games |
| C44 | King's pawn game | 1 games |
| C41 | Philidor's defence | 1 games |
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Overmaat, J | Brey, W | 0-1  |
43 | D30 | 1997 | SBO-ch |
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| Overmaat, J | Valkenburg, M | 0-1 |
30 | E10 | 1997 | SBO-ch |
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| Overmaat, J | Alberts, G | 0-1 |
86 | E11 | 1997 | SBO-ch |
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| Overmaat, J | Brinkhuis, G | 0-1 |
17 | A85 | 1997 | SBO-ch |
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| De Roos, R | Overmaat, J | 1-0 |
27 | B32 | 1997 | SBO-ch |
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| Bril, H | Overmaat, J | 0-1 |
55 | C44 | 1997 | SBO-ch |
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| Wever, R | Overmaat, J | ½-½ |
41 | C41 | 1997 | SBO-ch |
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