Tobias, Charles Winston
Current rating: 1415
| Grand Prix Manila 2017 (AKH standard) | starting rating: 1397 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 98 | Oledan, Earl (1542) | Won 2-0 | +211418 |
| 2standard | 81 | Penafuerte, Jan (1568) | Lost 1-2 | -151403 |
| 3standard | 195 | Franco, Anacletus Eugenio (1523) | Lost 0-2 | -161387 |
| 4standard | 253 | Guevarra, Jerrymel Lubin A (1572) | Draw 1-1 | +31390 |
| 5standard | 293 | Sacendoncillo, John Paul (1433) | Won 2-0 | +191409 |
| 6standard | 233 | Vicencio, Wyngard (1457) | Lost 0-2 | -171392 |
| 7standard | 276 | Rosales, Orlando (1436) | Won 2-0 | +191411 |
| 8standard | 216 | Acosta, Antonio Villan (1493) | Won 2-0 | +191430 |
| 9standard | 160 | Botin, Arvin (1596) | Lost 1-2 | -151415 |
| top | average opponent: 1513record: 4-4-1 | new rating: 1415 | ||
| Grand Prix Manila 2015 (KTK standard) | starting rating: 1443 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 425 | Cardenas, Daniel Aaron (1500) | Lost 0-2 | -171426 |
| 2standard | 623 | Tam, Jeffrey (1484) | Lost 0-2 | -171409 |
| 3standard | 654 | Plimaco, Dennis (1429) | Won 2-0 | +191428 |
| 4standard | 488 | Cayubit, Aries (1485) | Lost 0-2 | -171411 |
| 5standard | 565 | Candelaria, Roy Philip (1466) | Lost 0-2 | -171394 |
| 6standard | 595 | David, Elgene (1447) | Won 2-0 | +191413 |
| 7standard | 474 | Lazona, Daryl (1464) | Won 2-0 | +191432 |
| 8standard | 340 | Maligayo, Juanimar (1483) | Lost 0-2 | -181414 |
| 9standard | 344 | Briones, Marion (1467) | Lost 0-2 | -171397 |
| top | average opponent: 1469record: 3-6 | new rating: 1397 | ||
| Grand Prix Manila 2012 (AVR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 187 | Navarro, Philippe Rey (1500) | Lost 0-2 | -181482 |
| 2standard | 389 | Almendarez, Christian (1465) | Lost 0-2 | -181464 |
| 3standard | 506 | Caballero, Michael (1463) | Lost 1-2 | -181446 |
| 4standard | 529 | Roveros, Michael (1369) | Won 2-0 | +161462 |
| 5standard | 498 | Aragon, Rafael a (1396) | Lost 0-2 | -191443 |
| top | average opponent: 1439record: 1-4 | new rating: 1443 | ||