Overzicht ontwikkeling ELO-rating voor Jack Heemskerk (startELO: 1599)
| Ronde | Tegenstander | Score | Elo | |
|---|---|---|---|---|
| 1 | Piet Lindhout | ½ | 1596 | (- 3) |
| 2 | Frank Hordijk | 1 | 1609 | (+ 13) |
| 4 | Rene Janssen | ½ | 1611 | (+ 2) |
| 6 | Wilfried Binnendijk | 0 | 1609 | (- 2) |
| 7 | Paul Hoek | 1 | 1620 | (+ 11) |
| 8 | Henny Bosboom | ½ | 1619 | (- 1) |
| 9 | Guus Gilein | 0 | 1607 | (- 12) |
| 10 | Yunus Erdogan | 0 | 1597 | (- 10) |
| 11 | extern (1708) | ½ | 1600 | (+ 3) |
| 12 | Henk Sieders | 1 | 1611 | (+ 11) |
| 13 | extern (1562) | 1 | 1620 | (+ 9) |
| 16 | Wilfried Binnendijk | ½ | 1628 | (+ 8) |
| 17 | extern (1677) | 1 | 1642 | (+ 14) |
| 18 | Sjaak Ruigrok | ½ | 1647 | (+ 5) |
| Huidige ELO: | 1647 |