Rivera, Efren
Current rating: 1522
Record: 8-7
| Regional Championships Mexico City 2023 Cycle 4 (pioneer) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 26 | Hernandez-Santamaria, Victor (1560) | Won 2-0 | +191501 |
| 2pioneer | 14 | Toral, Juan (1522) | Lost 1-2 | -181483 |
| 3pioneer | 48 | Palma Perez del Valle, Jose Emiliano (1442) | Won 2-1 | +181501 |
| 4pioneer | 40 | Engelberg, Marcio (1486) | Lost 1-2 | -191482 |
| 5pioneer | 40 | Beltran, Manuel (1500) | Won 2-1 | +191501 |
| 6pioneer | 28 | Flores Calderon, Eduardo (1496) | Won 2-1 | +181519 |
| 7pioneer | 31 | Meneses, Abraham (1539) | Won 2-0 | +181537 |
| 8pioneer | 15 | Cortes, Miguel (1680) | Lost 1-2 | -151522 |
| average opponent: 1528record: 5-3 | new rating: 1522 | |||
| Regional Championships Mexico City 2023 Cycle 3 (pioneer) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 24 | Rangel Paez, Edgar Emmanuel (1375) | Lost 1-2 | -201480 |
| 2pioneer | 49 | Garita, Pablo (1483) | Won 2-1 | +181498 |
| 3pioneer | 57 | Ramon, Cesar (1501) | Won 2-1 | +181516 |
| 4pioneer | 12 | Molina, Wilberto (1623) | Won 2-0 | +201536 |
| 5pioneer | 13 | Perez, Victor [MEX] (1586) | Lost 0-2 | -171519 |
| 6pioneer | 31 | Mendez, Pablo [CRI] (1485) | Lost 1-2 | -191500 |
| 7pioneer | 45 | Cruz Brieno, David (1471) | Lost 0-2 | -181482 |
| average opponent: 1503record: 3-4 | new rating: 1482 | |||