| 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 | 2382 | 0.00080 | 0.50000 | 0.49920 |
| Groningen | 1999-04-10 | 0.000000 | Helmus | René | 1552 | 0.24855 | 0.00000 | -0.24855 |
| Leudsen | 1998-10-01 | 0.000000 | Rinzema | Sander | 1502 | 0.30887 | 0.50000 | 0.19113 |
| Groningen | 1999-04-10 | 0.000000 | Derks | Marc | 1476 | 0.34224 | 0.00000 | -0.34224 |
| Groningen | 1999-04-10 | 0.000000 | Eefting | Roel | 1395 | 0.45416 | 1.00000 | 0.54584 |
| Leudsen | 1998-10-01 | 0.000000 | Geertsma | Hans | 1254 | 0.65380 | 0.00000 | -0.65380 |
| Leudsen | 1998-10-01 | 0.000000 | Verleysdonk | Wim | 1186 | 0.73899 | 1.00000 | 0.26101 |
| Leudsen | 1998-10-01 | 0.000000 | Paffen | Ard | 986 | 0.91149 | 0.00000 | -0.91149 |
| Groningen | 1999-04-10 | 0.000000 | Lommert | Peter | 985 | 0.91196 | 1.00000 | 0.08804 |
| Leudsen | 1998-10-01 | 0.000000 | Haar | Eric van de | 896 | 0.95114 | 0.00000 | -0.95114 |
| Groningen | 1999-04-10 | 0.000000 | Keizer | Robin | 752 | 0.98248 | 1.00000 | 0.01752 |
| Leudsen | 1998-10-01 | 0.000000 | Smit | Joost de | 549 | 0.99618 | 1.00000 | 0.00382 |
| Groningen | 1999-04-10 | 0.000000 | Beijsens | Robert | 404 | 0.99874 | 1.00000 | 0.00126 |
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