Guimaraes, Pedro
Current rating: 1486
Record: 8-9
| Grand Prix Lisbon 2005 (BOK limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 245 | Henriques, Armenio (1500) | Won 2-1 | +181517 |
| 2sealed | 70 | Perez Fresnedo, Javier (1769) | Lost 1-2 | -131504 |
| 3sealed | 130 | Saavedra, Roberto (1501) | Lost 0-2 | -181486 |
| 4sealed | 195 | Braga, Jose (1447) | Won 2-1 | +171503 |
| 5sealed | 168 | Araujo Vianna Costa, Paulo (1549) | Lost 1-2 | -171486 |
| 6sealed | 165 | Figueiredo, Filipe 4462 (1482) | Won 2-0 | +181504 |
| 7sealed | 121 | Letra, Paulo (1499) | Won 2-1 | +181522 |
| 8sealed | 83 | Traguil, Luis (1540) | Lost 1-2 | -181504 |
| 9sealed | 87 | Jose, Antonio (1500) | Lost 1-2 | -181486 |
| average opponent: 1532record: 4-5 | new rating: 1486 | |||
| Grand Prix Lisbon 2002 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 39 | Apollo, Kristoffer (1505) | Won 2-1 | +181518 |
| 2extended | 121 | Costa, Sergio [PRT] (1500) | Lost 1-2 | -181500 |
| 3extended | 153 | Silva, Ricardo (1518) | Lost 1-2 | -181482 |
| 4extended | 230 | Sanchis, Jose Ramon (1437) | Won 2-0 | +171499 |
| 5extended | 164 | Marques, Maciel (1503) | Won 2-1 | +181517 |
| 6extended | 135 | Teixeira, Ricardo (1520) | Lost 0-2 | -181499 |
| 7extended | 170 | Silva, Amenico (1500) | Won 2-1 | +181517 |
| 8extended | 141 | Jacinto, Jack N (1519) | Lost 1-2 | -181499 |
| average opponent: 1500record: 4-4 | new rating: 1499 | |||