Harper, Jonathan
Current rating: 1422
| Grand Prix London 2019 (WAR sealed) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| A1sealed | 105 | Delouye, Adrien (1441) | Lost 0-2 | -181427 |
| A2sealed | 328 | Mendoza, Luke (1568) | Won 2-1 | +211448 |
| A3sealed | 214 | Stureson, Per (1759) | Won 1-0 | +231471 |
| A4sealed | 107 | Applebaum, Adam (1565) | Lost 0-2 | -161455 |
| C1sealed | 217 | Seeley, Russell (1500) | Lost 1-2 | -171438 |
| C2sealed | 247 | Chu, TC (1538) | Lost 0-2 | -161422 |
| top | average opponent: 1562record: 2-4 | new rating: 1422 | ||
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 426 | Scott, Joshua (1508) | Lost 1-2 | -181466 |
| 2sealed | 2171 | Capen, Nicholas (1428) | Won 2-1 | +181484 |
| 3sealed | 907 | Carey, Connor (1426) | Lost 0-2 | -191465 |
| 4sealed | 864 | Kay, Chad (1467) | Lost 0-2 | -181447 |
| 5sealed | 2182 | Arellano, Efren (1393) | Won 2-1 | +171464 |
| 6sealed | 741 | Stefek, Ronny (1430) | Lost 1-2 | -191445 |
| top | average opponent: 1442record: 2-4 | new rating: 1445 | ||
| Grand Prix Manchester 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 71 | Dee, Justin (1487) | Won 2-1 | +181518 |
| 2sealed | 36 | Remon, David (1517) | Won 2-1 | +181536 |
| 3sealed | 82 | Rico Bleda, Alejandro (1739) | Lost 0-2 | -151521 |
| 4sealed | 150 | De Swarte, Daniel (1523) | Lost 0-2 | -181503 |
| 5sealed | 174 | Edmondson, Henry (1428) | Lost 1-2 | -191484 |
| top | average opponent: 1539record: 2-3 | new rating: 1484 | ||