Bos, Roelof
Current rating: 1419
Record: 2-7
| Grand Prix Utrecht 2017 (AER standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 162 | Brandt, Jonas (1631) | Lost 1-2 | -151449 |
| 2standard | 356 | Van Der Woude, Joeri (1463) | Lost 0-2 | -171432 |
| 3standard | 586 | Guan, Thomas Zhennan (1534) | Lost 0-2 | -161416 |
| 4standard | 575 | Decker, Corben (1443) | Won 2-0 | +181434 |
| 5standard | 541 | Hartogs, Cor (1605) | Lost 0-2 | -151419 |
| average opponent: 1535record: 1-4 | new rating: 1419 | |||
| Grand Prix Brussels 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 378 | Kopanas, Anastasis (1488) | Lost 0-0 | -181482 |
| 2standard | 474 | Jacob, Tim (1487) | Lost 0-0 | -181464 |
| 3standard | 921 | De La Paz Cabrera, Joaquin (1494) | Won 2-0 | +181482 |
| 4standard | 746 | Isaksson, Marcus (1484) | Lost 0-2 | -181464 |
| average opponent: 1488record: 1-3 | new rating: 1464 | |||