Contreras, Juan Carlos
Current rating: 1565
Record: 11-9
| Grand Prix Sao Paulo 2019 (modern) | starting rating: 1568 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 205 | Gossn De Oliveira, Matheus (1671) | Won 2-0 | +201588 |
| 3modern | 232 | Rodas Cuartas, Kevin (1516) | Lost 1-2 | -201568 |
| 4modern | 369 | Nelson, Nicolas (1530) | Won 2-0 | +181586 |
| 5modern | 240 | Morales Anet, Felipe (1539) | Won 2-0 | +171603 |
| 6modern | 92 | Mansueto Pereira, Pedro Henrique (1522) | Lost 0-2 | -201583 |
| 7modern | 161 | Filidis, Guilherme (1541) | Lost 1-2 | -181565 |
| average opponent: 1553record: 3-3 | new rating: 1565 | |||
| Grand Prix Mexico City 2018 (GRN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 81 | Vega, R (1518) | Won 2-1 | +181518 |
| 3sealed | 82 | Jacobson, Mark (2020) | Lost 0-2 | -91509 |
| 4sealed | 94 | Tacher, Jaime (1466) | Won 2-0 | +171526 |
| 5sealed | 55 | Soto, Rodrigo (1689) | Won 2-0 | +211547 |
| 6sealed | 25 | Frischknecht, Rodrigo (1611) | Won 2-1 | +191566 |
| 7sealed | 28 | Araiza, Hugo Daniel (1925) | Won 2-1 | +241590 |
| 8sealed | 10 | England, Sarah (1645) | Lost 1-2 | -171573 |
| 9sealed | 32 | Boone, Allan (1691) | Lost 0-2 | -151558 |
| 10draft | 39 | Perdiguerra, Jerry (1586) | Won 2-1 | +181576 |
| 11draft | 32 | Corrigan, Abe (1810) | Lost 0-2 | -141562 |
| 12draft | 18 | Estrada Morales, Mauricio (1804) | Won 2-0 | +231585 |
| 13draft | 7 | Avila Garcia, Jose Francisco (1603) | Lost 1-2 | -181567 |
| 14draft | 24 | Boone, Allan (1665) | Lost 0-2 | -161551 |
| 15draft | 24 | Gonzalez Herrera, Alejandro Aaron (1503) | Won 2-1 | +171568 |
| average opponent: 1681record: 8-6 | new rating: 1568 | |||