Atkinson, Rogerio
Current rating: 1445
Record: 1-4
| Grand Prix Porto Alegre 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 67 | De Oliveira, Everson (1500) | Won 2-0 | +181518 |
| 2sealed | 16 | Dias, Bruno (1518) | Lost 0-2 | -181500 |
| 3sealed | 91 | Lafuente, Diego (1443) | Lost 1-2 | -191481 |
| 4sealed | 143 | Carvalho, Helder (1485) | Lost 0-2 | -181463 |
| 5sealed | 152 | Puhl, Eduardo (1445) | Lost 0-2 | -181445 |
| average opponent: 1478record: 1-4 | new rating: 1445 | |||