Johnstone, Kevin
Current rating: 1453
| Grand Prix Calgary 2019 (modern) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 40 | Bush, Mitchell (1500) | Won 2-0 | +181506 |
| 2modern | 151 | Ciurko, William (1463) | Lost 1-2 | -191487 |
| 3modern | 337 | Zhu, Adrian (1475) | Lost 0-2 | -181469 |
| 4modern | 296 | Wallace, Mitchell (1547) | Won 2-1 | +191488 |
| 5modern | 239 | Elg, Kevin (1507) | Lost 1-2 | -171471 |
| 6modern | 277 | MacPherson, Mitchell (1470) | Lost 0-2 | -181453 |
| top | average opponent: 1494record: 2-4 | new rating: 1453 | ||
| Grand Prix Vancouver 2017 (modern) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2558 | Zheng, Tommy (1500) | Lost 0-2 | -171445 |
| 2modern | 2490 | Pressley, Chris (1444) | Lost 0-2 | -181427 |
| 3modern | 2638 | Coghill, Arthur (1464) | Won 2-0 | +181445 |
| 4modern | 2496 | White, Jon [CAN] (1484) | Won 2-1 | +191464 |
| 5modern | 2560 | Guillen, Lucas (1587) | Won 2-1 | +201484 |
| 6modern | 2333 | Ring, Clinton (1514) | Lost 0-2 | -171467 |
| 7modern | 2430 | Choe, Pete (1484) | Won 2-0 | +181485 |
| 8modern | 2296 | Hashemi, Milad (1526) | Won 2-0 | +191504 |
| 9modern | 2209 | Towle, Truman (1506) | Won 2-1 | +181522 |
| 10modern | 2115 | Porath, Aaron (1592) | Lost 1-2 | -171505 |
| 11modern | 2199 | Drake, Alex (1539) | Lost 0-2 | -171488 |
| top | average opponent: 1513record: 6-5 | new rating: 1488 | ||
| Grand Prix Vancouver 2016 (OGW limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 450 | Mali, Michael (1500) | Won 2-0 | +181518 |
| 2sealed | 185 | Jeffery, Ben (1547) | Lost 0-2 | -171501 |
| 3sealed | 501 | Chapman, Richard (1476) | Won 0-0 | +171518 |
| 4sealed | 415 | Reynolds, Keelan (1522) | Lost 0-2 | -181500 |
| 5sealed | 548 | Ibarra-Leal, Jesus (1355) | Lost 1-2 | -201480 |
| 6sealed | 564 | Miko, Casey (1501) | Lost 0-2 | -181462 |
| top | average opponent: 1483record: 2-4 | new rating: 1462 | ||