Costa, Joao 2247
Current rating: 1483
Record: 3-4-1
| Grand Prix Lisbon 2005 (BOK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 131 | Machado, Diogo (1500) | Draw 1-1 | 01500 |
| 2sealed | 159 | Pereira, Nuno 3192 (1499) | Lost 1-2 | -181482 |
| 3sealed | 214 | Marques, Luis 6712 (1482) | Won 2-0 | +181500 |
| 4sealed | 155 | Schwankl, Andre (1568) | Lost 0-2 | -171483 |
| 5sealed | 202 | Marques, Bruno (1483) | Lost 1-2 | -181465 |
| 6sealed | 194 | Venturimha Gomes, Hugo (1465) | Lost 1-2 | -181447 |
| 7sealed | 171 | Ribeiro, Daniel [PRT] (1449) | Won 2-0 | +181465 |
| 8sealed | 136 | Neues, Luis (1465) | Won 2-1 | +181483 |
| average opponent: 1489record: 3-4-1 | new rating: 1483 | |||