Zweers, Peter
Current rating: 1451
Record: 7-10
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 99 | Stolte, Jakob (1394) | Won 2-0 | +171445 |
| 2sealed | 141 | Cardiel, Marta (1349) | Lost 1-2 | -201425 |
| 3sealed | 212 | ter Wal, Gerjan (1557) | Won 2-0 | +211446 |
| 4sealed | 113 | Van Rooij, Peter (1520) | Won 2-0 | +191465 |
| 5sealed | 93 | Baumert, Martin (1618) | Won 2-1 | +211486 |
| 6sealed | 38 | Hendrick, Laurent (1587) | Lost 1-2 | -161470 |
| 7sealed | 75 | Reynaerts, Bart (1383) | Won 2-0 | +161486 |
| 8sealed | 79 | De Marelle, Anthony (1483) | Lost 0-2 | -181468 |
| 9sealed | 71 | Helgason, Egill (1510) | Lost 0-2 | -171451 |
| average opponent: 1489record: 5-4 | new rating: 1451 | |||
| Grand Prix Eindhoven 2005 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 241 | Gramser, Niels (1500) | Won 2-0 | +181518 |
| 2extended | 28 | Koptisch, Stefan (1445) | Lost 0-2 | -191499 |
| 3extended | 168 | Zander, Oliver (1500) | Lost 0-2 | -181481 |
| 4extended | 331 | Van Den Brakel, Jeroen (1482) | Lost 1-2 | -181463 |
| 5extended | 391 | Bell, Tom (1465) | Won 2-0 | +181481 |
| 6extended | 338 | Waelkens, Wim (1535) | Lost 1-2 | -171464 |
| 7extended | 275 | Brown, Dorian (1463) | Lost 0-2 | -181446 |
| 8extended | 247 | Maletz, Tobias (1445) | Lost 0-2 | -181428 |
| average opponent: 1479record: 2-6 | new rating: 1428 | |||