Da Cunha Martins, Joao
Current rating: 1446
Record: 3-7
| Grand Prix Sao Paulo 2018 (modern) | starting rating: 1435 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 317 | Pettersen Forattini, Matheus (1606) | Won 2-1 | +211456 |
| 3modern | 251 | Ferrari, Henrique (1534) | Lost 1-2 | -161440 |
| 4modern | 395 | Cunha Volpato, Otavio Antonio (1502) | Won 2-0 | +191459 |
| 5modern | 212 | Hespanhol Rodrigues, Vinicius (1598) | Lost 1-2 | -161443 |
| 6modern | 267 | Simoes, Fernando Henrique (1521) | Won 2-1 | +201463 |
| 7modern | 222 | Reis, Roberto (1536) | Lost 1-2 | -171446 |
| average opponent: 1549record: 3-3 | new rating: 1446 | |||
| Grand Prix Porto Alegre 2017 (AER standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 58 | Perez, Walter (1782) | Lost 0-2 | -131487 |
| 3standard | 233 | Novak, Treicy (1596) | Lost 1-2 | -161471 |
| 4standard | 207 | Parisotto, Nicolas (1481) | Lost 1-2 | -181453 |
| 5standard | 261 | Oliveira, Hiero (1448) | Lost 0-2 | -181435 |
| average opponent: 1577record: 0-4 | new rating: 1435 | |||