| Uitslagen van externe ronde 4 | 02-02-2018 |
| 1 | Coen | Mekers | W | ½-½ | 1833 |
| 2 | Erik | Wille | Z | 1-0 | 1252 |
| 3 | Wisse | Witmans | W | 0-1 | 1830 |
| 4 | Rob | Huberts | Z | ½-½ | 1770 |
| 5 | Jeroen van | Ginneken | W | 0-1 | 1826 |
| 6 | Siert | Huizinga | Z | ½-½ | 1649 |
| 7 | Xadya van | Bruxvoort | W | 1-0 | 1640 |
| 8 | Tom | Katoen | Z | 0-1 | 1686 |
| 1 | Jeroen | Kersten | Z | ½-½ | 1954 |
| 2 | Robert | Naasz | W | 1-0 | 1887 |
| 3 | Hans | Rigter | Z | 1-0 | 1880 |
| 4 | Marco | Braam | W | 1-0 | 1973 |
| 5 | Piet de | Mol | Z | 0-1 | 1784 |
| 6 | Edwin | Peters | W | 0-1 | 1677 |
| 7 | Jan | Groen | Z | 1-0 | 1637 |
| 8 | Theo van | Amerongen | W | 0-1 | 1835 |
| 1 | Jacques | Boonstra | W | 1-0 | 1665 |
| 2 | Kazem | Mollahosseini | Z | 0-1 | 1510 |
| 3 | Hedser | Dijkstra | W | ½-½ | 1564 |
| 4 | Oscar | Mercan | Z | 0-1 | 1625 |
| 5 | Dick | Vliek | W | 1-0 | 1565 |
| 6 | Lex van | Hattum | Z | 1-0 | 1462 |
| 7 | Horst | Eder | W | 0-1 | 1565 |
| 8 | Hub | Kusters | Z | 1-0 | 1565 |
| 1 | Tijs van | Dijk | Z | ½-½ | 1582 |
| 2 | Jan | Vermeer | W | ½-½ | 1471 |
| 3 | Wilfred | Jansz | Z | ½-½ | 1501 |
| 4 | Ron | Brachten | W | 1-0 | 1390 |
| 5 | Bob | Kooij | Z | 1-0 | 1394 |
| 6 | Koen van | Keulen | W | 1-0 | 1384 |