Overzicht ontwikkeling ELO-rating voor Henk Sieders (startELO: 1594)
| Ronde | Tegenstander | Score | Elo | |
|---|---|---|---|---|
| 1 | Anton Lindhout | 0 | 1581 | (- 13) |
| 2 | Joop Turk | 0 | 1574 | (- 7) |
| 3 | Jan Haasnoot | 1 | 1574 | (+ 0) |
| 4 | Frank Janssens | 1 | 1580 | (+ 6) |
| 5 | Albert de Haas | 1 | 1583 | (+ 3) |
| 6 | Otto Brunner | 1 | 1585 | (+ 2) |
| 7 | extern (1703) | 0 | 1577 | (- 8) |
| 8 | Guus Gilein | ½ | 1578 | (+ 1) |
| 9 | Yunus Erdogan | 1 | 1589 | (+ 11) |
| 10 | extern (1584) | 0 | 1578 | (- 11) |
| 11 | Rene Janssen | 1 | 1590 | (+ 12) |
| 12 | Wilfried Binnendijk | 0 | 1587 | (- 3) |
| 13 | extern (1745) | 0 | 1581 | (- 6) |
| 14 | Paul Hoek | ½ | 1580 | (- 1) |
| 15 | Henny Bosboom | ½ | 1582 | (+ 2) |
| 16 | Guus Gilein | ½ | 1581 | (- 1) |
| Huidige ELO: | 1581 |