Souza, Guilherme
Current rating: 1505
Record: 6-6-1
| Grand Prix Rio de Janeiro 2013 (GTC standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 145 | Cruz, Anderson (1443) | Won 2-0 | +171517 |
| 2standard | 95 | Alves Abilio, Jose Augusto (1518) | Won 2-1 | +181535 |
| 3standard | 69 | Saredo, Adrian (1587) | Won 2-0 | +191554 |
| 4standard | 37 | Morelli, Marcos Eduardo (1500) | Lost 0-2 | -191535 |
| 5standard | 79 | Damo da Rosa, Paulo Vitor (1898) | Lost 0-2 | -121523 |
| 6standard | 155 | Goulart, Thiago (1502) | Lost 0-2 | -181505 |
| average opponent: 1575record: 3-3 | new rating: 1505 | |||
| Grand Prix Sao Paulo 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 19 | da Conceicao Oliveira, Shigeo Yamada (1500) | Won 2-0 | +181518 |
| 2standard | 110 | Gennari Souza, Juliano (1545) | Draw 1-1 | +11519 |
| 3standard | 115 | Leandro Aparecido Mace, (1519) | Won 2-1 | +181537 |
| 4standard | 92 | Rodrigo Almeida Martin, (1518) | Won 2-1 | +171554 |
| 5standard | 48 | Lombardelli, Bruno (1573) | Lost 0-2 | -171537 |
| 6standard | 93 | Paulo Maria, (1534) | Lost 0-0 | -191518 |
| 7standard | 146 | Zacharski, Juan Jose (1483) | Lost 0-2 | -181500 |
| average opponent: 1525record: 3-3-1 | new rating: 1500 | |||