Marreiros, Joao
Current rating: 1627
| Grand Prix Paris 2015 (DTK standard) | starting rating: 1606 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 159 | Ramsey, Dave (1463) | Won 2-0 | +161622 |
| 2standard | 150 | Bunjes, Guido (1518) | Won 2-1 | +161638 |
| 3standard | 11 | Merino Bustos, Marcelo (1535) | Lost 0-2 | -201618 |
| 4standard | 198 | Griffin, David (1517) | Lost 0-2 | -201598 |
| 5standard | 444 | Barberi, Jonathan (1505) | Won 2-0 | +161614 |
| 6standard | 379 | Oblet, Sylvain (1332) | Won 2-0 | +131627 |
| top | average opponent: 1478record: 4-2 | new rating: 1627 | ||
| Grand Prix Seville 2015 (FRF standard) | starting rating: 1552 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 175 | Martinez, Guillem (1500) | Won 2-1 | +171569 |
| 2standard | 76 | Mendes, Andre (1660) | Lost 1-2 | -161553 |
| 3standard | 231 | Ortega Redondo, Oscar (1544) | Won 2-1 | +181571 |
| 4standard | 215 | Ancona, Michele (1777) | Won 2-0 | +211592 |
| 5standard | 160 | Riveiro, Francisco Javier (1529) | Lost 0-2 | -191573 |
| 6standard | 160 | Herrera Arroyo, Jose Javier (1455) | Won 2-1 | +161589 |
| 7standard | 84 | Garcia Balta, Miguel (1535) | Won 2-1 | +171606 |
| 8standard | 50 | Castro, Miguel (1538) | Won 2-1 | +171623 |
| 9standard | 65 | Ocampo, Rodolfo (1702) | Lost 0-2 | -171606 |
| top | average opponent: 1582record: 6-3 | new rating: 1606 | ||
| Grand Prix Madrid 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 375 | Auriol Barbera, Jordi (1451) | Won 2-1 | +171517 |
| 2modern | 119 | Cervi, Cesidio (1543) | Lost 1-2 | -171500 |
| 3modern | 562 | De Jesus Pedrero, Jose (1504) | Lost 0-2 | -181482 |
| 4modern | 648 | Ganna, Davide (1469) | Won 2-1 | +171499 |
| 5modern | 696 | Bayon Lopez, Ivan (1474) | Won 2-0 | +181517 |
| 6modern | 281 | Traarbach, Charly (1454) | Won 2-0 | +171534 |
| 7modern | 123 | Cabrero, Joan (1594) | Won 2-1 | +191553 |
| 8modern | 125 | Ordieres, Pelayo (1555) | Lost 1-2 | -181535 |
| 9modern | 256 | Ventura, Ruben Charuto (1481) | Won 2-1 | +171552 |
| top | average opponent: 1503record: 6-3 | new rating: 1552 | ||