Vilches, Oscar
Current rating: 1427
| Grand Prix Santiago 2017 (AKH standard) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 81 | Quiroga, Martin (1895) | Lost 0-2 | -111437 |
| 4standard | 106 | Villaseca, Felipe (1559) | Lost 0-2 | -151422 |
| 5standard | 180 | Siskindovich, Santiago (1556) | Won 2-1 | +201442 |
| 6standard | 191 | Pocai, Andre (1473) | Won 2-0 | +191461 |
| 7standard | 120 | Santibanez, Cesar (1484) | Lost 1-2 | -181443 |
| 8standard | 191 | Witt, Walter (1544) | Lost 1-2 | -161427 |
| top | average opponent: 1585record: 2-4 | new rating: 1427 | ||
| Grand Prix Santiago 2016 (KLD standard) | starting rating: 1411 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 143 | Marelli, Alejandro Miguel (1490) | Lost 0-2 | -171394 |
| 4standard | 150 | Zavaleta, Sebastian (1528) | Draw 1-1 | +31397 |
| 5standard | 167 | Valderrama, Conrado (1577) | Won 2-1 | +211418 |
| 6standard | 93 | Pinto, Claudio (1507) | Won 2-1 | +201438 |
| 7standard | 53 | Rodriguez, Jose Roberto (1692) | Lost 1-2 | -141424 |
| 8standard | 115 | Barria, Jaime (1612) | Won 0-0 | +221446 |
| 9standard | 62 | Vega Parra, Francisco (1572) | Draw 1-1 | +21448 |
| top | average opponent: 1568record: 3-2-2 | new rating: 1448 | ||
| Grand Prix Santiago 2013 (THS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 150 | Sanchez, Antonio (1500) | Won 2-1 | +181518 |
| 2modern | 125 | Olave Bugini, Ignacio (1518) | Lost 0-2 | -181500 |
| 3modern | 207 | Huenchullan, Esteban (1465) | Lost 0-2 | -191481 |
| 4modern | 270 | Ramirez, Lucas (1563) | Lost 0-2 | -161465 |
| 5modern | 332 | Reyes Ocaranza, Nicolas (1463) | Lost 0-2 | -181447 |
| 6modern | 298 | Flores, Roberto E (1449) | Lost 1-2 | -181429 |
| 7modern | 271 | Gonzalez Fisher, Daniel Mario (1430) | Lost 0-2 | -181411 |
| top | average opponent: 1484record: 1-6 | new rating: 1411 | ||