Mainieri, Julian
Current rating: 1502
Record: 3-3
| Grand Prix Costa Rica 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 22 | Retana, Alejandro (1500) | Lost 1-2 | -181482 |
| 3sealed | 141 | Acuna, Heilyn (1483) | Won 2-0 | +181500 |
| 4sealed | 131 | Alvarado, Esteban (1500) | Won 2-0 | +181518 |
| 5sealed | 113 | Enberg, Staffan (1608) | Lost 1-2 | -161502 |
| 6sealed | 125 | Finol, Rafael (1500) | Won 2-0 | +181520 |
| 7sealed | 87 | Mena, Javier (1517) | Lost 0-2 | -181502 |
| average opponent: 1518record: 3-3 | new rating: 1502 | |||