Cunha e Vallo, Joao Guilherme
Current rating: 1503
Record: 8-8
| Grand Prix Sao Paulo 2015 (DTK standard) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 44 | Alexandre, Rafael Soar (1500) | Won 2-1 | +181519 |
| 2standard | 161 | de Souza La Rocca, Felipe (1518) | Won 2-1 | +181537 |
| 3standard | 107 | Lagos, Cristian (1567) | Lost 1-2 | -181519 |
| 4standard | 174 | Pereira, Luiz (1517) | Won 2-1 | +181537 |
| 5standard | 117 | Otuzi, Lucas (1506) | Won 2-1 | +181555 |
| 6standard | 76 | Alves Gomes, Raony (1549) | Lost 1-2 | -191536 |
| 7standard | 145 | Fernandes Ferraz, Diego (1729) | Lost 0-2 | -141522 |
| 8standard | 257 | Dos Santos Mello, Alexandre (1472) | Lost 0-2 | -191503 |
| average opponent: 1545record: 4-4 | new rating: 1503 | |||
| Grand Prix Buenos Aires 2014 (BNG standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 212 | Moreyra, Esteban (1500) | Lost 1-2 | -181482 |
| 2standard | 239 | Levy, Mauro (1482) | Won 2-0 | +181500 |
| 3standard | 321 | Soliz, Oscar (1503) | Won 2-0 | +181518 |
| 4standard | 240 | Solis Flores, Roberto Alexis (1510) | Won 2-0 | +181536 |
| 5standard | 175 | Zurita Gonzalez, David (1616) | Lost 1-2 | -171519 |
| 6standard | 215 | Toro, Cristian (1475) | Won 2-1 | +181537 |
| 7standard | 140 | Waszuk, Juan Pablo (1539) | Lost 0-2 | -181519 |
| 8standard | 195 | Pellegrini, Matias (1518) | Lost 0-2 | -181501 |
| average opponent: 1518record: 4-4 | new rating: 1501 | |||