Guerra Guzman, Alfonso
Current rating: 1498
Record: 3-3
| Grand Prix Costa Rica 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 30 | Jimenez, Vanessa (1500) | Won 2-1 | +181518 |
| 3sealed | 65 | Marin, Oscar (1518) | Won 2-0 | +181536 |
| 4sealed | 76 | Zuniga, Beatriz (1500) | Won 2-0 | +171553 |
| 5sealed | 47 | Morales, Jose [GTM] (1482) | Lost 0-2 | -191534 |
| 6sealed | 85 | Antunes, Robert (1507) | Lost 0-2 | -181516 |
| 7sealed | 80 | Segovia, Cesar (1518) | Lost 0-2 | -181498 |
| average opponent: 1504record: 3-3 | new rating: 1498 | |||