| Game Balance of Robbert van Opstal, sorted by Dates of Events | ||||||||
|---|---|---|---|---|---|---|---|---|
| Event | Opponent | Result | ||||||
| Place | Date ↑ | Significance | Surname | Prename | Rating | Expected | Observed | Net Yield |
| Groningen | 1999-04-10 | 0.000000 | Helmus | René | 1681 | 0.15384 | 0.00000 | -0.15384 |
| Derks | Marc | 1516 | 0.33536 | 0.00000 | -0.33536 | |||
| Eefting | Roel | 1312 | 0.62164 | 1.00000 | 0.37836 | |||
| Lommert | Peter | 1131 | 0.83154 | 1.00000 | 0.16846 | |||
| Keizer | Robin | 968 | 0.93688 | 1.00000 | 0.06312 | |||
| Beijsens | Robert | 664 | 0.99293 | 1.00000 | 0.00707 | |||
| Leudsen | 1998-10-01 | 0.000000 | Rinzema | Sander | 1643 | 0.18839 | 0.50000 | 0.31161 |
| Geertsma | Hans | 1464 | 0.40587 | 0.00000 | -0.40587 | |||
| Verleysdonk | Wim | 1338 | 0.58487 | 1.00000 | 0.41513 | |||
| Haar | Eric van de | 1203 | 0.75853 | 0.00000 | -0.75853 | |||
| Paffen | Ard | 1112 | 0.84831 | 0.00000 | -0.84831 | |||
| Leijten | Ben | 1029 | 0.90674 | 0.50000 | -0.40674 | |||
| Smit | Joost de | 922 | 0.95390 | 1.00000 | 0.04610 | |||
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