| Game Balance of Robbert van Opstal, sorted by Ratings of Opponents | ||||||||
|---|---|---|---|---|---|---|---|---|
| Event | Opponent | Result | ||||||
| Place | Date | Significance | Surname | Prename | Rating ↑ | Expected | Observed | Net Yield |
| Leudsen | 1998-10-01 | 0.000000 | Leijten | Ben | 2420 | 0.00056 | 0.50000 | 0.49944 |
| Groningen | 1999-04-10 | 0.000000 | Helmus | René | 1537 | 0.25541 | 0.00000 | -0.25541 |
| Leudsen | 1998-10-01 | 0.000000 | Rinzema | Sander | 1496 | 0.30528 | 0.50000 | 0.19472 |
| Groningen | 1999-04-10 | 0.000000 | Derks | Marc | 1470 | 0.33879 | 0.00000 | -0.33879 |
| Groningen | 1999-04-10 | 0.000000 | Eefting | Roel | 1391 | 0.44748 | 1.00000 | 0.55252 |
| Leudsen | 1998-10-01 | 0.000000 | Geertsma | Hans | 1238 | 0.66352 | 0.00000 | -0.66352 |
| Leudsen | 1998-10-01 | 0.000000 | Verleysdonk | Wim | 1180 | 0.73614 | 1.00000 | 0.26386 |
| Leudsen | 1998-10-01 | 0.000000 | Paffen | Ard | 978 | 0.91142 | 0.00000 | -0.91142 |
| Groningen | 1999-04-10 | 0.000000 | Lommert | Peter | 962 | 0.91978 | 1.00000 | 0.08022 |
| Leudsen | 1998-10-01 | 0.000000 | Haar | Eric van de | 894 | 0.94878 | 0.00000 | -0.94878 |
| Groningen | 1999-04-10 | 0.000000 | Keizer | Robin | 741 | 0.98282 | 1.00000 | 0.01718 |
| Leudsen | 1998-10-01 | 0.000000 | Smit | Joost de | 541 | 0.99617 | 1.00000 | 0.00383 |
| Groningen | 1999-04-10 | 0.000000 | Beijsens | Robert | 382 | 0.99886 | 1.00000 | 0.00114 |
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