Vargas, Oscar
Current rating: 1612
Record: 18-13-1
| Regional Championships Mexico City 2023 Cycle 4 (pioneer) | starting rating: 1578 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 53 | Mijares, Alonso (1632) | Lost 0-2 | -171561 |
| 2pioneer | 90 | Freeman, Marcelino (1658) | Won 2-0 | +201581 |
| 3pioneer | 44 | Russett, Charles (1525) | Won 2-1 | +171598 |
| 4pioneer | 23 | Villanueva Chavez, Julio Cesar (1453) | Won 2-0 | +151613 |
| 5pioneer | 10 | Engelberg, Marcio (1504) | Won 2-1 | +161629 |
| 6pioneer | 5 | Dominguez Roldan, Fernando De Jesus (1778) | Lost 1-2 | -151614 |
| 7pioneer | 23 | Leal, Emmanuel (1591) | Won 2-1 | +181632 |
| 8pioneer | 17 | Quesada, Jose (1559) | Lost 0-2 | -201612 |
| top | average opponent: 1588record: 5-3 | new rating: 1612 | ||
| Regional Championships Mexico City 2023 Cycle 3 (pioneer) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 33 | Marquez, Jaime (1500) | Won 2-0 | +181522 |
| 2pioneer | 20 | Mijares, Alonso (1696) | Won 2-0 | +211543 |
| 3pioneer | 9 | Soto, Julio Cesar (1547) | Won 2-1 | +181561 |
| 4pioneer | 1 | escalante, josue (1555) | Lost 0-2 | -181543 |
| 5pioneer | 7 | Landeta, Ricardo (1596) | Won 2-1 | +191562 |
| 6pioneer | 8 | Martinez Ramirez, Manuel Alejandro (1552) | Draw 1-1 | 01562 |
| 7pioneer | 11 | Rocha, Francisco (1503) | Won 2-1 | +171579 |
| 8pioneer | 5 | Escobar, Alejandro (1541) | Won 2-0 | +171596 |
| Qpioneer | Guzman Vazquez, Jose Antonio (1603) | Lost 0-0 | -181578 | |
| top | average opponent: 1566record: 6-2-1 | new rating: 1578 | ||
| Grand Prix Mexico City 2018 (GRN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 95 | Hernandez Olivares, Christopher Gilbert (1500) | Won 2-0 | +181518 |
| 2sealed | 47 | Perez, Luis [MEX] (1461) | Lost 1-2 | -191499 |
| 3sealed | 155 | Gilbert, Diego (1454) | Won 2-0 | +171516 |
| 4sealed | 73 | Zhang, Tony (1604) | Lost 0-2 | -161500 |
| 5sealed | 109 | Bazan, Elisa (1425) | Won 2-0 | +161516 |
| 6sealed | 97 | Perez, Ricardo (1522) | Won 2-0 | +181534 |
| 7sealed | 48 | Kassari, John (1801) | Won 2-0 | +231557 |
| 8sealed | 39 | Arce King, Guillermo (1591) | Won 2-0 | +191576 |
| 9sealed | 18 | Betesh, Ralph (1789) | Won 2-1 | +221598 |
| 10draft | 13 | Friedman, Ben (2171) | Lost 0-2 | -91589 |
| 11draft | 16 | Trejo Garcia, Erik Leonel (1757) | Lost 1-2 | -151574 |
| 12draft | 6 | Boone, Allan (1666) | Lost 1-2 | -161558 |
| 13draft | 9 | Paz, Juan (1479) | Lost 0-2 | -201538 |
| 14draft | 36 | Delia Sanchez, Christian Adair (1688) | Lost 1-2 | -151523 |
| 15draft | 18 | Villouta, Javier (1471) | Lost 0-2 | -191504 |
| top | average opponent: 1625record: 7-8 | new rating: 1504 | ||