Diego Vieitez,
Current rating: 1463
Record: 1-3
| Grand Prix Sao Paulo 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 112 | Miura, William (1500) | Won 2-1 | +181518 |
| 2standard | 15 | Hayrynen, Andrei (1436) | Lost 0-2 | -191499 |
| 3standard | 172 | Diego K Vieira, (1500) | Lost 1-2 | -181481 |
| 4standard | 260 | Oliveira, Jefferson S (1482) | Lost 0-2 | -181463 |
| average opponent: 1479record: 1-3 | new rating: 1463 | |||