Jeffery, James
Current rating: 1397
Record: 8-15
| Grand Prix Toronto 2019 (modern) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 41 | Falvey, John (1500) | Won 2-1 | +191466 |
| 2modern | 42 | Harrington, Wyatt (1524) | Lost 0-2 | -171449 |
| 3modern | 402 | Fievet, Colas (1603) | Lost 0-2 | -151434 |
| 4modern | 444 | Sicotte, Timothe (1478) | Won 2-0 | +191453 |
| 5modern | 438 | Warkentin, Nathan (1500) | Lost 0-2 | -171436 |
| 6modern | 394 | Wall, Jordan (1490) | Lost 0-2 | -181418 |
| 7modern | 364 | Ramkay, Steven (1249) | Lost 0-2 | -211397 |
| top | average opponent: 1478record: 2-5 | new rating: 1397 | ||
| Grand Prix Toronto 2018 (modern) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 39 | Woodward, Leandre (1500) | Won 2-0 | +181491 |
| 2modern | 234 | Scurry, Ben (1519) | Lost 1-2 | -171474 |
| 3modern | 375 | Holmes, Christopher (1530) | Won 2-0 | +191493 |
| 4modern | 206 | Keeffe, Stephen (1642) | Lost 0-2 | -161477 |
| 5modern | 526 | Emond, Maxime (1428) | Won 2-1 | +171494 |
| 6modern | 439 | Rianhard, Cain (1731) | Lost 0-2 | -131481 |
| 7modern | 428 | Johnson, Anthony (1520) | Lost 0-2 | -181463 |
| 8modern | 422 | Puccio, Scott (1557) | Lost 1-2 | -161447 |
| top | average opponent: 1553record: 3-5 | new rating: 1447 | ||
| Grand Prix Las Vegas 2015 (2) (MM2 limited) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 3 | White, Nolan (1500) | Lost 0-2 | -171473 |
| top | record: 0-1 | new rating: 1473 | ||
| Grand Prix Ottawa 2014 (KTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 124 | Racine Leblanc, Samuel (1451) | Won 2-0 | +171517 |
| 2sealed | 191 | Whitbread, Scott (1516) | Won 2-1 | +181535 |
| 3sealed | 101 | Kosyak, Nick (1538) | Won 2-1 | +181553 |
| 4sealed | 2 | Schnayer, David (1738) | Lost 1-2 | -151538 |
| 5sealed | 206 | Lombardi, Robert (1757) | Lost 0-2 | -141524 |
| 6sealed | 254 | Pienaar, Ivan (1594) | Lost 0-2 | -161508 |
| 7sealed | 323 | Vasil, Jeremy (1546) | Lost 0-2 | -181490 |
| top | average opponent: 1591record: 3-4 | new rating: 1490 | ||