De Visser, Bas
Current rating: 1445
Record: 1-4-3
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 582 | Mikuscak, Daniel (1500) | Lost 0-2 | -181482 |
| 2sealed | 643 | Van Leeuwen, Sweitse J (1482) | Lost 1-2 | -181464 |
| 3sealed | 677 | Hakkert, Gert-jan (1463) | Lost 0-2 | -181446 |
| 4sealed | 674 | Krutwagen, Theo (1448) | Draw 1-1 | 01446 |
| 5sealed | 646 | Kruit, Bertram (1431) | Draw 1-1 | 01446 |
| 6sealed | 604 | Woodham, Christina (1444) | Draw 1-1 | 01446 |
| 7sealed | 571 | Macejka, Jiri (1386) | Won 2-0 | +171463 |
| 8sealed | 529 | Rosalie, Jimmy (1482) | Lost 0-2 | -181445 |
| average opponent: 1454record: 1-4-3 | new rating: 1445 | |||