de Greef, John W
Current rating: 1445
Record: 2-5
| Grand Prix Seattle 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 63 | Cook, Narayan (1463) | Lost 0-2 | -191481 |
| 2standard | 365 | herling, brian (1482) | Won 2-0 | +181499 |
| 3standard | 340 | Berni, Roberto (1508) | Lost 0-2 | -171482 |
| 4standard | 421 | Iler, Shane (1481) | Won 2-0 | +171499 |
| 5standard | 271 | Liu, Steven (1467) | Lost 0-2 | -181481 |
| 6standard | 390 | Wagner, Andrew W (1480) | Lost 0-2 | -181463 |
| 7standard | 331 | Morris, Michael (1464) | Lost 0-2 | -181445 |
| average opponent: 1478record: 2-5 | new rating: 1445 | |||