Jefferies, Ian
Current rating: 1439
Record: 5-9
| Grand Prix Dallas-Fort Worth 2015 (ORI limited) | starting rating: 1452 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 485 | Doshi, Vivek (1629) | Won 2-1 | +211473 |
| 2sealed | 369 | Ray, Daniel (1518) | Lost 1-2 | -171456 |
| 3sealed | 524 | Scauzillo, Ryan (1500) | Won 2-1 | +191475 |
| 4sealed | 358 | Hittell, Justin (1488) | Lost 0-2 | -181457 |
| 5sealed | 567 | Keller, Israel (1420) | Lost 1-2 | -181439 |
| top | average opponent: 1511record: 2-3 | new rating: 1439 | ||
| Grand Prix Las Vegas 2015 (2) (MM2 limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 242 | O'Connor, Brendan (1500) | Won 2-1 | +191466 |
| 2sealed | 74 | Malinowski, Mike (1519) | Won 2-0 | +191485 |
| 3sealed | 80 | Worman, Christopher (1538) | Lost 1-2 | -171468 |
| 4sealed | 84 | Son, Daniel (1489) | Lost 1-2 | -171451 |
| 5sealed | 155 | Safarik, Brett (1501) | Won 2-0 | +191470 |
| 6sealed | 96 | Sanchez, Miguel (1504) | Lost 1-2 | -181452 |
| top | average opponent: 1509record: 3-3 | new rating: 1452 | ||
| Grand Prix San Antonio 2014 (KTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 4 | Phillips, Joshua (1595) | Lost 0-2 | -161484 |
| 2standard | 330 | Wang, Yitu (1468) | Lost 1-2 | -191465 |
| 3standard | 528 | Perez, Kenneth (1465) | Lost 0-2 | -181447 |
| top | average opponent: 1509record: 0-3 | new rating: 1447 | ||