Piedra, Arturo
Current rating: 1465
Record: 2-4
| Grand Prix Costa Rica 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 51 | Montero, Francisco (1535) | Lost 1-2 | -171483 |
| 2standard | 141 | Hernandez, Cristian (1482) | Lost 0-2 | -181465 |
| 3standard | 220 | Venegas, Michael (1448) | Won 2-0 | +171482 |
| 4standard | 176 | Cubillo, Stayner (1505) | Lost 0-2 | -171465 |
| 5standard | 204 | Jovane Ali, Roberto Enrique (1464) | Won 2-1 | +181483 |
| 6standard | 194 | Quesada Valverde, Kelvin (1487) | Lost 0-2 | -181465 |
| average opponent: 1487record: 2-4 | new rating: 1465 | |||