Perez, Jonathan
Current rating: 1530
Record: 6-5
| Grand Prix Costa Rica 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 47 | Gutierrez, Juan Antonio (1424) | Lost 1-2 | -191481 |
| 4sealed | 87 | Gonzalez, Elvis (1499) | Won 2-1 | +181499 |
| 5sealed | 72 | Gomez, Teodosis Gavriel (1521) | Won 2-0 | +181517 |
| 6sealed | 35 | Sehezar, Bernaby (1521) | Won 2-1 | +181535 |
| 7sealed | 19 | Morales Mejia, Javier (1538) | Lost 0-2 | -181517 |
| 8sealed | 26 | Vasquez, Alfonso (1535) | Won 2-1 | +191536 |
| 9draft | 24 | Duran, Gabriel (1589) | Lost 0-2 | -171519 |
| 10draft | 16 | Morales Solano, Rodrigo (1574) | Lost 1-2 | -171502 |
| 11draft | 27 | Alvarado, Saul (1833) | Lost 1-2 | -121490 |
| 13draft | 1 | Amaral, Laerthe (1574) | Won 2-1 | +191509 |
| 14draft | 8 | Robins, Jules (1646) | Won 2-0 | +211530 |
| average opponent: 1568record: 6-5 | new rating: 1530 | |||