Quiron, Marco
Current rating: 1503
Record: 3-3
| Grand Prix Costa Rica 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 4 | Villalobos, Luis (1500) | Lost 0-2 | -181482 |
| 3sealed | 118 | Corrales, Mauricio (1518) | Won 2-0 | +191501 |
| 4sealed | 45 | Rogachevsky, Victor (1620) | Won 2-1 | +201521 |
| 5sealed | 26 | Antunes, Robert (1525) | Won 2-1 | +181539 |
| 6sealed | 33 | Avila Chacon, Jonathan (1537) | Lost 0-2 | -181521 |
| 7sealed | 58 | Salazar, Jesus (1524) | Lost 0-2 | -181503 |
| average opponent: 1537record: 3-3 | new rating: 1503 | |||