Jeffs, Don
Current rating: 1496
Record: 4-4
| Grand Prix Denver 2015 (KTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 403 | Lynn, Steve (1469) | Lost 1-2 | -191481 |
| 2standard | 446 | Torgeson, Carsten (1482) | Won 2-0 | +181499 |
| 3standard | 366 | Folger, Carson (1499) | Won 2-1 | +181517 |
| 4standard | 196 | Silvester, Christopher (1500) | Lost 1-2 | -181499 |
| 5standard | 522 | Cook, Jerry (1513) | Lost 1-2 | -181481 |
| 6standard | 478 | Krause, Julian (1400) | Won 2-0 | +171498 |
| 7standard | 364 | Cook, Brennen (1439) | Won 2-0 | +171515 |
| 8standard | 263 | Kikta, Mark (1463) | Lost 0-2 | -191496 |
| average opponent: 1471record: 4-4 | new rating: 1496 | |||