Jacobo, Carlos Manuel
Current rating: 1499
Record: 3-3
| Grand Prix Costa Rica 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 119 | Molina B, Jose (1500) | Won 2-1 | +181518 |
| 3sealed | 26 | Brenes Rojas, Marco (1518) | Won 2-1 | +181536 |
| 4sealed | 35 | van Sickle, Joseph (1406) | Won 2-1 | +161552 |
| 5sealed | 18 | Vazquez Pena, Javier (1518) | Lost 1-2 | -191533 |
| 6sealed | 15 | Chang, Morgan (1605) | Lost 0-2 | -171516 |
| 7sealed | 67 | Juarez, Rodolfo (1577) | Lost 0-2 | -171499 |
| average opponent: 1521record: 3-3 | new rating: 1499 | |||