Brenes Rojas, Marco
Current rating: 1440
Record: 6-10
| Grand Prix Costa Rica 2016 (SOI standard) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 12 | Cedeno Turcios, Jose Alberto (1484) | Won 2-1 | +181466 |
| 2standard | 84 | Gutierrez Ortega, Carlos (1511) | Lost 1-2 | -171449 |
| 3standard | 155 | Arellano, Fidel (1552) | Lost 0-2 | -161433 |
| 4standard | 191 | Solano, Manuel (1467) | Lost 1-2 | -171416 |
| 5standard | 209 | Perez, Max (1582) | Won 2-0 | +211437 |
| 6standard | 172 | Perez Hernandez, Alejandro (1483) | Lost 0-2 | -171420 |
| 7standard | 188 | Donnelly, Neal (1447) | Won 2-0 | +181438 |
| 8standard | 154 | Potes, Julio (1508) | Won 2-0 | +191457 |
| 9standard | 129 | Moreno Delgado, Alexander (1484) | Lost 0-2 | -171440 |
| average opponent: 1502record: 4-5 | new rating: 1440 | |||
| Grand Prix Costa Rica 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 16 | Gonzales, Josue (1500) | Won 2-0 | +181518 |
| 3sealed | 26 | Jacobo, Carlos Manuel (1518) | Lost 1-2 | -181500 |
| 4sealed | 63 | Barrantes, Jose (1500) | Lost 0-2 | -181482 |
| 5sealed | 81 | Coto Grosser, Daniel (1519) | Won 2-0 | +191501 |
| 6sealed | 58 | RUIZ, VLADIMIR (1535) | Lost 0-2 | -181483 |
| 7sealed | 97 | Cubillo, Stayner (1483) | Lost 0-2 | -181465 |
| 8sealed | 90 | Zuniga, Luis Diego (1487) | Lost 1-2 | -171448 |
| average opponent: 1506record: 2-5 | new rating: 1448 | |||