Villalobos, Ronaldo
Current rating: 1487
Record: 2-3
| Grand Prix Costa Rica 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 47 | BERGER, PERCY (1500) | Won 2-1 | +181518 |
| 3sealed | 123 | Blume, Marco (1931) | Lost 0-2 | -111507 |
| 4sealed | 122 | Gomez, Fabian (1464) | Won 2-0 | +171524 |
| 5sealed | 125 | Castillo, Javier E (1484) | Lost 0-2 | -181506 |
| 6sealed | 128 | Chimg Chen, Kin Jong (1499) | Lost 0-2 | -191487 |
| average opponent: 1576record: 2-3 | new rating: 1487 | |||