Telfer, James W
Current rating: 1406
| Grand Prix London 2013 (GTC limited) | starting rating: 1439 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 533 | Popelier, Anthony (1500) | Lost 0-2 | -171422 |
| 2sealed | 781 | Paananen, Juha (1503) | Lost 1-2 | -161406 |
| top | average opponent: 1502record: 0-2 | new rating: 1406 | ||
| Grand Prix London 2011 (MBS limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 205 | Few, Christopher G (1500) | Won 2-0 | +191466 |
| 2sealed | 280 | Ho, Jun Feng Jack (1790) | Won 2-0 | +241490 |
| 3sealed | 242 | Friestad, Disorn (1555) | Lost 1-2 | -171473 |
| 4sealed | 263 | Malukov, Pavel (1569) | Lost 0-2 | -171456 |
| 5sealed | 289 | Horwood, Barry (1503) | Lost 1-2 | -171439 |
| top | average opponent: 1583record: 2-3 | new rating: 1439 | ||
| Grand Prix Brighton 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 114 | Woolrich, Jake S (1500) | Lost 0-2 | -181482 |
| 2sealed | 232 | Bellegueulle, Julien (1529) | Lost 0-2 | -171465 |
| 3sealed | 298 | Geach, James R (1464) | Lost 1-2 | -181447 |
| top | average opponent: 1498record: 0-3 | new rating: 1447 | ||