Atanazio Pedroso, Guilherme
Current rating: 1600
Record: 14-8
| Grand Prix Porto Alegre 2015 (modern) | starting rating: 1626 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 122 | Fernandes Ferraz, Diego (1794) | Lost 1-2 | -151611 |
| 4modern | 180 | Alberto, Felipe (1422) | Won 2-0 | +151626 |
| 5modern | 83 | Moraes, Amaury (1544) | Won 2-1 | +161642 |
| 6modern | 65 | Souza, Joao Claudio (1535) | Lost 1-2 | -201622 |
| 7modern | 148 | Goncalves Quadros, Dubes (1549) | Won 2-1 | +171639 |
| 8modern | 49 | de Souza Silva, Giliad (1511) | Lost 1-2 | -201619 |
| 9modern | 116 | Dos Santos, Fernando (1559) | Lost 0-2 | -191600 |
| average opponent: 1559record: 3-4 | new rating: 1600 | |||
| Grand Prix Sao Paulo 2015 (DTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 327 | Sampaio Krawctschuk, L (1500) | Won 2-1 | +181518 |
| 2standard | 164 | Poleva, Anna (1481) | Won 2-0 | +171535 |
| 3standard | 198 | Araujo Cardozo, Gustavo (1540) | Lost 0-2 | -181517 |
| 4standard | 362 | Leite, Iran (1518) | Won 2-0 | +181535 |
| 5standard | 129 | Nonato, Jose R (1503) | Won 2-1 | +181553 |
| 6standard | 133 | Mastelaro, Martin (1553) | Lost 1-2 | -181535 |
| 7standard | 202 | Luis da Silva de Paula, (1535) | Won 2-0 | +181553 |
| 8standard | 133 | Sandro Martins de Araujo, Alex (1556) | Won 2-0 | +181571 |
| 9standard | 96 | Ladeira, Julio (1576) | Won 2-1 | +181589 |
| 10standard | 39 | Fonseca Castilho, Vini (1575) | Won 2-1 | +181607 |
| 11standard | 31 | Leite, Guilherme (1610) | Lost 1-2 | -181589 |
| 12standard | 50 | Ximenes, Felipe (1597) | Lost 0-2 | -181571 |
| 13standard | 53 | Carneiro, Jean Carlos (1587) | Won 2-1 | +181589 |
| 14standard | 43 | Oliveira Dantas, Saulo (1639) | Won 2-1 | +191608 |
| 15standard | 33 | Dannemann, Joao Manoel (1620) | Won 2-0 | +181626 |
| average opponent: 1559record: 11-4 | new rating: 1626 | |||