Overzicht ontwikkeling ELO-rating voor J.B.G. Jonkers (startELO: 1587)
| Ronde | Tegenstander | Score | Elo | |
|---|---|---|---|---|
| 1 | H. Schoonbeek | 0 | 1576 | (- 11) |
| 3 | B.H. Wilders | 1 | 1589 | (+ 13) |
| 5 | H. Juffer | 0 | 1581 | (- 8) |
| - | extern (1581) | 1 | 1591 | (+ 10) |
| 8 | J. Meima | 0 | 1577 | (- 14) |
| 9 | J. Bosma | ½ | 1573 | (- 4) |
| 10 | F.J. Mönch | 1 | 1585 | (+ 12) |
| 11 | H. Schoonbeek | 0 | 1574 | (- 11) |
| 12 | C. Wassink | 1 | 1579 | (+ 5) |
| 13 | extern (1579) | ½ | 1579 | (+ 0) |
| 14 | F. Jansen | ½ | 1579 | (+ 0) |
| 15 | E.G.A. Schroth | 1 | 1585 | (+ 6) |
| 16 | G.J. Sepers | 1 | 1590 | (+ 5) |
| 17 | extern (1590) | 0 | 1580 | (- 10) |
| 18 | extern (1580) | 1 | 1590 | (+ 10) |
| 19 | H. Juffer | ½ | 1593 | (+ 3) |
| 20 | J. Meima | ½ | 1589 | (- 4) |
| 21 | extern (1589) | ½ | 1589 | (+ 0) |
| 22 | T. Verbeek | 0 | 1586 | (- 3) |
| 23 | extern (1586) | 0 | 1576 | (- 10) |
| 24 | extern (1576) | 0 | 1566 | (- 10) |
| 25 | H. Schoonbeek | 0 | 1557 | (- 9) |
| 26 | J. Ero | ½ | 1559 | (+ 2) |
| 27 | extern (1559) | 1 | 1569 | (+ 10) |
| 28 | J.A.J. Marcus | 0 | 1569 | (+ 0) |
| 29 | E.G.A. Schroth | ½ | 1566 | (- 3) |
| 30 | J. van den Berg | 0 | 1560 | (- 6) |
| 31 | extern (1560) | ½ | 1560 | (+ 0) |
| 32 | T. Verbeek | 0 | 1558 | (- 2) |
| 34 | extern (1558) | 1 | 1568 | (+ 10) |
| 35 | F.J. Mönch | 1 | 1579 | (+ 11) |
| Huidige ELO: | 1579 |