Vieira, Joao
Current rating: 1482
Record: 6-7-1
| Grand Prix Lisbon 2002 (extended) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 36 | Queiroz, Artur (1500) | Lost 1-2 | -181483 |
| 2extended | 236 | Santiago, Carlos (1482) | Lost 0-2 | -181465 |
| 3extended | 255 | Figueiredo, Manuel (1431) | Won 2-1 | +171482 |
| 4extended | 275 | Concado, Pedro (1482) | Won 2-0 | +181500 |
| 5extended | 178 | Almeida, Fernando (1552) | Won 2-0 | +191519 |
| 6extended | 163 | Pimentel, Pedro (1487) | Lost 0-2 | -191500 |
| 7extended | 183 | Lores, Iago (1472) | Lost 0-2 | -181482 |
| average opponent: 1486record: 3-4 | new rating: 1482 | |||
| Grand Prix Porto 2000 (PCY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 205 | Sousa, Eduardo (1500) | Won 2-0 | +181518 |
| 2sealed | 25 | Santos, Alexandre (1518) | Draw 1-1 | 01518 |
| 3sealed | 75 | Vera, Henrique (1518) | Lost 0-2 | -181500 |
| 4sealed | 179 | Marques, Hugo (1500) | Won 0-0 | +181518 |
| 5sealed | 128 | Cardona, Paulo (1555) | Lost 0-2 | -171501 |
| 6sealed | 150 | Bicho, Frederico (1499) | Lost 0-2 | -181483 |
| 7sealed | 152 | Gomes, Hugo (1482) | Won 2-0 | +181501 |
| average opponent: 1510record: 3-3-1 | new rating: 1501 | |||