Ketcheson, Derek
Current rating: 1403
| Grand Prix Toronto 2019 (modern) | starting rating: 1435 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 232 | Roy, Josue (1500) | Lost 0-2 | -171418 |
| 2modern | 362 | Vermette, Alexandre (1481) | Won 2-0 | +191437 |
| 3modern | 313 | Suntha, Sangar (1500) | Lost 0-2 | -171420 |
| 4modern | 533 | Ha, Justin (1482) | Lost 0-2 | -171403 |
| top | average opponent: 1491record: 1-3 | new rating: 1403 | ||
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 643 | Li, Jack (1655) | Lost 1-2 | -151451 |
| 2modern | 738 | Henderson, James (1535) | Won 2-1 | +201471 |
| 3modern | 984 | Barnes, Tanner (1499) | Lost 1-2 | -181453 |
| 4modern | 1331 | Fabiani, Pietro (1469) | Won 2-0 | +191472 |
| 5modern | 1072 | Susala, Kyle (1500) | Lost 0-2 | -181454 |
| 6modern | 969 | Collins, Randall (1381) | Lost 1-2 | -191435 |
| top | average opponent: 1506record: 2-4 | new rating: 1435 | ||
| Grand Prix Minneapolis 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 48 | Jarvis, Nicholas (1458) | Won 2-0 | +171517 |
| 2standard | 302 | Meyer, Shaun (1521) | Lost 0-2 | -181499 |
| 3standard | 368 | Dennis, Matthew (1648) | Lost 1-2 | -151484 |
| 4standard | 539 | Hovington-Caron, Gabriel (1480) | Lost 0-2 | -181466 |
| top | average opponent: 1527record: 1-3 | new rating: 1466 | ||