Mass, Martyn
Current rating: 1445
Record: 3-6
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 518 | Carrein, Inke (1500) | Lost 1-2 | -181482 |
| 2sealed | 607 | van Rijn, Frank (1411) | Lost 0-2 | -191463 |
| 3sealed | 667 | Sas, Ivar (1464) | Won 2-0 | +181481 |
| 4sealed | 630 | Lepage, Guy (1508) | Won 2-0 | +181499 |
| 5sealed | 579 | Oosterbaan, Brenn (1500) | Lost 1-2 | -181481 |
| 6sealed | 594 | Tammes, Roeland (1481) | Lost 1-2 | -181463 |
| 7sealed | 562 | Durr-frederiksen, Kenneth (1446) | Lost 1-2 | -181445 |
| 8sealed | 530 | Gola, Matej M (1444) | Won 2-0 | +181463 |
| 9sealed | 501 | Alvarez, Alfonso (1460) | Lost 1-2 | -181445 |
| average opponent: 1468record: 3-6 | new rating: 1445 | |||