Diego K Vieira,
Current rating: 1465
Record: 3-5
| Grand Prix Sao Paulo 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 176 | Alves Gomes, Raony (1500) | Lost 0-2 | -181482 |
| 2standard | 228 | Nery Neto, Hernany (1482) | Won 2-0 | +181500 |
| 3standard | 172 | Diego Vieitez, (1499) | Won 2-1 | +181518 |
| 4standard | 99 | Guilherme Almeida, (1516) | Lost 0-2 | -181500 |
| 5standard | 166 | Otarola, Juan (1534) | Lost 1-2 | -171483 |
| 6standard | 209 | Li, Alessandro (1482) | Lost 0-0 | -181465 |
| 7standard | 190 | Joao Gabriel Ribeiro d, (1464) | Won 2-0 | +181483 |
| 8standard | 146 | Guilherme Augusto Borg, (1481) | Lost 0-2 | -181465 |
| average opponent: 1495record: 3-5 | new rating: 1465 | |||