Overzicht ontwikkeling ELO-rating voor Sjaak Ruigrok (startELO: 1801)
| Ronde | Tegenstander | Score | Elo | |
|---|---|---|---|---|
| 1 | Lex van Gunsteren | 1 | 1807 | (+ 6) |
| 2 | Joop Turk | 0 | 1795 | (- 12) |
| 4 | Albert de Haas | ½ | 1788 | (- 7) |
| 5 | Paul Hoek | 1 | 1793 | (+ 5) |
| 6 | Jack Heemskerk | 0 | 1775 | (- 18) |
| 8 | Co van de Tang | ½ | 1767 | (- 8) |
| 9 | Ben Vink | 1 | 1770 | (+ 3) |
| 10 | extern (1785) | ½ | 1769 | (- 1) |
| 11 | Henk Sieders | 0 | 1756 | (- 13) |
| 12 | Jan van Schie | 1 | 1759 | (+ 3) |
| 13 | Paul Hoek | 1 | 1766 | (+ 7) |
| 14 | Frank Hordijk | 1 | 1773 | (+ 7) |
| - | extern (1710) | 0 | 1761 | (- 12) |
| 15 | Cees Prook | 1 | 1764 | (+ 3) |
| 19 | Henk Sieders | 1 | 1769 | (+ 5) |
| 20 | Wilfried Binnendijk | ½ | 1771 | (+ 2) |
| 21 | extern (1830) | 0 | 1760 | (- 11) |
| 22 | Arjan Plug | ½ | 1763 | (+ 3) |
| Huidige ELO: | 1763 |