| Rondenlijst van Gerrit Lemmen | ||||||
| Ronde | Datum | Tegenstander | Kleur | Score | Punten | Rating |
| 1 | 11-09-2018 | Ramon Witte | W | 1,0 | 18 | 1807 |
| 2 | 18-09-2018 | Jan Poland | Z | 0,0 | -2 | 1797 |
| 3 | 25-09-2018 | Jan van Gijsen | W | 0,0 | -5 | 1781 |
| 4 | 02-10-2018 | Bondsw.di | 14 | |||
| 5 | 16-10-2018 | Theo Bakker | Z | 1,0 | 20 | 1787 |
| 6 | 30-10-2018 | Jawdat Adib | Z | 0,5 | 8 | 1784 |
| 7 | 06-11-2018 | Egbert van Oene | W | 0,5 | 11 | 1787 |
| 8 | 13-11-2018 | Bondsw.di | 14 | |||
| 9 | 20-11-2018 | Guido Florijn | W | 0,0 | -1 | 1780 |
| 10 | 27-11-2018 | Frits Leenart | Z | 0,0 | -3 | 1769 |
| 11 | 04-12-2018 | Peter van Diepen | Z | 1,0 | 19 | 1775 |
| 12 | 11-12-2018 | Willem Meyles | W | 0,0 | -2 | 1768 |
| 13 | 18-12-2018 | Leo van Steenoven | Z | 0,5 | 10 | 1771 |
| 14 | 08-01-2019 | Alexander Versluis | Z | 0,0 | -4 | 1759 |
| 15 | 15-01-2019 | Nico Mak | W | 0,0 | -3 | 1747 |
| 16 | 29-01-2019 | Bondsw.di | 14 | |||
| 17 | 05-02-2019 | Jan Poland | W | 1,0 | 22 | 1758 |
| 18 | 12-02-2019 | Rob Heijink | Z | 0,5 | 8 | 1756 |
| 19 | 26-02-2019 | Frits Leenart | W | 1,0 | 21 | 1765 |
| 20 | 05-03-2019 | Dick Bouma | W | 0,5 | 10 | 1766 |
| 21 | 12-03-2019 | Henk Kleijn | Z | 0,5 | 7 | 1762 |
| 22 | 19-03-2019 | Bondsw.di | 14 | |||
| 23 | 26-03-2019 | afgezegd | 6 | |||
| 24 | 02-04-2019 | Kiek Schouten | W | 0,5 | 7 | 1758 |
| 25 | 09-04-2019 | Alexander Versluis | W | 1,0 | 20 | 1766 |
| 26 | 16-04-2019 | Jan Poland | Z | 0,0 | -2 | 1756 |
| 27 | 23-04-2019 | Rob Freer | W | 1,0 | 23 | 1770 |
| 28 | 07-05-2019 | Martin Rep | Z | 0,0 | -4 | 1759 |
| 29 | 14-05-2019 | Peter van Diepen | W | 1,0 | 19 | 1766 |
| 30 | 21-05-2019 | Egbert van Oene | Z | 0,5 | 11 | 1769 |
| Barrièrepunten | 336 | |||||
| Totaal | 606 | |||||