Overzicht ontwikkeling ELO-rating voor J. Willemsen (startELO: 1642)
| Ronde | Tegenstander | Score | Elo | |
|---|---|---|---|---|
| 1 | B. van der Ven | 1 | 1645 | (+ 3) |
| 2 | R. Gosens | ½ | 1644 | (- 1) |
| 3 | F. Vink | 1 | 1646 | (+ 2) |
| 4 | P. Jaspers | 0 | 1642 | (- 4) |
| 5 | H. Kriens | 1 | 1656 | (+ 14) |
| 6 | extern (1713) | 0 | 1648 | (- 8) |
| 8 | K. Pfaffenhöfer | 1 | 1657 | (+ 9) |
| 9 | W. van den Bosch | ½ | 1660 | (+ 3) |
| 10 | extern (1847) | 1 | 1675 | (+ 15) |
| 11 | M. Govers | 0 | 1667 | (- 8) |
| 12 | P. van den Hout | ½ | 1672 | (+ 5) |
| 13 | P. François jr | ½ | 1670 | (- 2) |
| 15 | extern (1500) | 1 | 1676 | (+ 6) |
| 16 | P. Jaspers | ½ | 1682 | (+ 6) |
| 17 | R. Stadhouders | 1 | 1694 | (+ 12) |
| 18 | H. Kriens | ½ | 1696 | (+ 2) |
| 19 | extern (1915) | 0 | 1692 | (- 4) |
| 20 | D. Pals | 1 | 1697 | (+ 5) |
| 22 | W. van den Bosch | 0 | 1688 | (- 9) |
| 23 | extern (1681) | 0 | 1678 | (- 10) |
| 24 | P. van den Hout | 0 | 1672 | (- 6) |
| 25 | extern (1842) | ½ | 1676 | (+ 4) |
| 26 | M. Govers | 1 | 1688 | (+ 12) |
| 27 | extern (1933) | 0 | 1684 | (- 4) |
| 28 | P. Jaspers | ½ | 1690 | (+ 6) |
| 29 | R. Stadhouders | 0 | 1682 | (- 8) |
| Huidige ELO: | 1682 |