Overzicht ontwikkeling ELO-rating voor Sjaak Ruigrok (startELO: 1660)
| Ronde | Tegenstander | Score | Elo | |
|---|---|---|---|---|
| 2 | Arjan Plug | ½ | 1665 | (+ 5) |
| 3 | Joop Turk | ½ | 1666 | (+ 1) |
| 4 | extern (1534) | 0 | 1653 | (- 13) |
| 5 | Henny Bosboom | ½ | 1651 | (- 2) |
| 6 | Guus Gilein | ½ | 1650 | (- 1) |
| 7 | Jack Heemskerk | 1 | 1659 | (+ 9) |
| 8 | Anton Lindhout | 1 | 1667 | (+ 8) |
| 9 | Yunus Erdogan | 1 | 1675 | (+ 8) |
| 10 | extern (1449) | 1 | 1679 | (+ 4) |
| 12 | Joop Turk | 0 | 1670 | (- 9) |
| 13 | Henk Sieders | ½ | 1667 | (- 3) |
| 14 | Rene Janssen | 0 | 1656 | (- 11) |
| 15 | Arjan Plug | 0 | 1652 | (- 4) |
| Huidige ELO: | 1652 |