Guedes, Vitor
Current rating: 1509
| Grand Prix Lisbon 2005 (BOK limited) | starting rating: 1530 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 117 | Ferreira, Frederico (1518) | Lost 1-2 | -181512 |
| 2sealed | 174 | Fatia, Gualter (1481) | Won 2-0 | +171529 |
| 3sealed | 176 | McGovern, Mark (1472) | Lost 0-2 | -191510 |
| 4sealed | 228 | Alonso, Sergio (1499) | Won 2-0 | +181528 |
| 5sealed | 158 | Neues, Luis (1500) | Draw 1-1 | -11527 |
| 6sealed | 149 | Mesquita, Carlos (1482) | Lost 1-2 | -181509 |
| top | average opponent: 1492record: 2-3-1 | new rating: 1509 | ||
| Grand Prix Lisbon 2002 (extended) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 66 | Graca, Ricardo (1500) | Won 1-0 | +171553 |
| 2extended | 120 | venancio, filipe (1518) | Lost 0-2 | -181535 |
| 3extended | 165 | Santos, Alberto (1500) | Lost 1-2 | -191516 |
| 4extended | 234 | Esteves, Fabio (1482) | Won 2-0 | +171533 |
| 5extended | 167 | Gomes, Miguel (1500) | Lost 1-2 | -181515 |
| 6extended | 244 | Rodrigues, Hugo 3525 (1481) | Lost 1-2 | -191496 |
| 7extended | 234 | Santos, Fabio (1465) | Won 2-1 | +181514 |
| 8extended | 172 | Barajas, Alfonso (1419) | Won 2-0 | +161530 |
| top | average opponent: 1483record: 4-4 | new rating: 1530 | ||
| Grand Prix Porto 2000 (PCY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 11 | Coelho, Eduardo (1500) | Won 2-1 | +181518 |
| 2sealed | 23 | Betti, Alessandro (1569) | Lost 0-2 | -171501 |
| 3sealed | 114 | FLOREZ, Luis (1502) | Won 2-1 | +181519 |
| 4sealed | 154 | Parra Centeno, Ignacio (1467) | Won 0-0 | +171536 |
| 5sealed | 84 | Castro, Simao (1535) | Lost 1-2 | -181518 |
| 6sealed | 112 | Machado, Fernando [PRT] (1518) | Won 2-0 | +181536 |
| top | average opponent: 1515record: 4-2 | new rating: 1536 | ||