Possato, William
Current rating: 1593
Record: 19-13
| Grand Prix Sao Paulo 2012 (M13 limited) | starting rating: 1604 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 150 | Viana, Fabricio (1500) | Won 2-0 | +161620 |
| 2sealed | 171 | De Biasi, Julio (1535) | Won 2-0 | +161636 |
| 3sealed | 46 | da Silveira Junior, Ricardo (1518) | Won 2-0 | +161652 |
| 4sealed | 52 | Vieira, Paulo T (1428) | Lost 0-2 | -221630 |
| 5sealed | 46 | Montanhe, Tiago de Moraes (1536) | Lost 0-2 | -191611 |
| 6sealed | 168 | Wohlers, Renato (1616) | Lost 0-2 | -181593 |
| top | average opponent: 1522record: 3-3 | new rating: 1593 | ||
| Grand Prix Sao Paulo 2002 (JUD standard) | starting rating: 1595 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 32 | Lima Cardoso, Filipe (1553) | Won 2-0 | +171612 |
| 5standard | 10 | Ruel, Antoine (1844) | Lost 0-2 | -141598 |
| 6standard | 21 | Vieira, Gustavo Almeida (1490) | Won 2-1 | +171615 |
| 7standard | 14 | Dos Santos, Thales Lima (1584) | ID | 01615 |
| 8standard | 22 | Longo Junior, Sergio (1440) | Lost 1-2 | -221593 |
| 9standard | 28 | Galimbertti, Victor (1514) | Lost 1-2 | -191574 |
| 10standard | 28 | Cabrini, Ricardo (1534) | Won 2-0 | +171591 |
| 11standard | 26 | Zimmer, Marco Marcelo (1504) | Lost 1-2 | -191572 |
| 12standard | 29 | Perracini, Rafael (1428) | Won 2-0 | +151587 |
| 13standard | 24 | Salomao, Omar B (1528) | Won 2-0 | +171604 |
| top | average opponent: 1542record: 5-4-1 | new rating: 1604 | ||
| Grand Prix Curitiba 2001 (extended) | starting rating: 1538 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 43 | Kim, Jong-Won (1519) | Won 2-1 | +171555 |
| 4extended | 16 | Ostrovich, Diego (1646) | Won 2-0 | +201575 |
| 5extended | 19 | Gimenes, Diego (1537) | Won 2-1 | +171592 |
| 6extended | 3 | Martins Moreira Neto, Leopoldo (1567) | Won 2-0 | +181610 |
| 7extended | 1 | Quinta, Matheus Chaud (1605) | Won 2-1 | +181628 |
| 8extended | 2 | Le Saux, Rafael (1768) | Lost 0-2 | -161612 |
| 9extended | 7 | Hino, Celso Mitsuo (1619) | Lost 0-2 | -181594 |
| 10extended | 10 | Poplawski Brandao, Eduardo (1559) | Won 2-0 | +181612 |
| 11extended | 6 | Fuller, Ryan (1929) | Lost 0-2 | -131599 |
| 12extended | 11 | Longo Junior, Sergio (1389) | Won 2-0 | +141613 |
| 13extended | 8 | Zampere Junior, Celso (1593) | Lost 1-2 | -181595 |
| top | average opponent: 1612record: 7-4 | new rating: 1595 | ||
| Grand Prix Rio de Janeiro 2001 (PLS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 45 | Fialho Martins, Sergio (1518) | Lost 0-2 | -181482 |
| 3sealed | 96 | Silva Santos, David (1500) | Won 2-1 | +191501 |
| 4sealed | 81 | Hercules, Aurelio (1518) | Won 2-0 | +181519 |
| 5sealed | 40 | Nascimento, Rodrigo Aguilar (1536) | Won 2-0 | +181537 |
| 6sealed | 31 | Caramuru Cabral, Marcio (1555) | Won 2-1 | +191556 |
| 7sealed | 9 | Oliveira, Thiago Montenegro (1554) | Lost 0-0 | -181538 |
| top | average opponent: 1530record: 4-2 | new rating: 1538 | ||