Marcos, Antonio
Current rating: 1478
Record: 6-7
| Grand Prix Sao Paulo 2017 (modern) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 222 | Paez Sequeira, Alexandre (1500) | Lost 0-2 | -191517 |
| 2modern | 379 | Panzarini, Diogo (1464) | Lost 0-2 | -191498 |
| 3modern | 581 | Cardoso Zimmer, Guilherme (1464) | Won 2-1 | +171515 |
| 4modern | 494 | De Castro, Paulo Henrique (1482) | Lost 1-2 | -181497 |
| 5modern | 509 | Reis, Renan (1467) | Lost 0-2 | -191478 |
| average opponent: 1475record: 1-4 | new rating: 1478 | |||
| Grand Prix Madrid 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 92 | Ramos, Alejandro (1453) | Lost 1-2 | -191481 |
| 2sealed | 458 | Gomes, Nuno M (1479) | Won 2-1 | +181499 |
| 3sealed | 337 | Aguado, Hector (1502) | Won 2-0 | +181517 |
| 4sealed | 306 | Parody Garcia, Jose Antonio (1517) | Lost 0-2 | -181499 |
| 5sealed | 390 | Gutierrez, Gonzalo (1500) | Won 2-0 | +181517 |
| 6sealed | 200 | Perez, Angel Luis (1520) | Won 2-0 | +181535 |
| 7sealed | 133 | Puebla, Daniel (1538) | Lost 0-2 | -181517 |
| 8sealed | 181 | Nabais, Antonio (1535) | Won 2-1 | +191536 |
| average opponent: 1506record: 5-3 | new rating: 1536 | |||