Jefferies, Chris
Current rating: 1431
Record: 2-6
| Grand Prix London 2013 (GTC limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 368 | Barnes, Matt J (1510) | Won 2-0 | +191465 |
| 2sealed | 120 | Muller, Martin (1516) | Lost 1-2 | -171448 |
| 3sealed | 417 | De Swarte, Daniel (1523) | Lost 0-2 | -161432 |
| 4sealed | 628 | Lund, Martin Andre (1486) | Won 2-0 | +191451 |
| 5sealed | 606 | Banasiak, Ewelina (1376) | Lost 0-2 | -201431 |
| average opponent: 1482record: 2-3 | new rating: 1431 | |||
| Grand Prix London 2011 (MBS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 58 | Bharmal, Mustafa (1507) | Lost 1-2 | -181482 |
| 2sealed | 107 | Wertich, Thomas (1482) | Lost 0-1 | -181464 |
| 3sealed | 138 | Peraldi, Antoine (1465) | Lost 1-2 | -181446 |
| average opponent: 1485record: 0-3 | new rating: 1446 | |||