Ewing, Jack
Current rating: 1439
Record: 8-12
| Grand Prix Detroit 2019 (M20 limited) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 7 | Cuyar, Christopher (1501) | Won 2-0 | +191469 |
| 2sealed | 90 | Honaker, Ben (1504) | Lost 0-2 | -181451 |
| 3sealed | 248 | Eady, Brent (1762) | Lost 0-2 | -121439 |
| 4sealed | 271 | Cheng, Vince (1481) | Won 2-1 | +181457 |
| 5sealed | 177 | Beinlich, Connor (1414) | Lost 1-2 | -181439 |
| top | average opponent: 1532record: 2-3 | new rating: 1439 | ||
| Grand Prix St. Louis 2006 (CSP limited) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 101 | Suire, Ian (1446) | Lost 1-2 | -191450 |
| 2sealed | 162 | Mikac, Rikhard M (1482) | Won 2-0 | +191469 |
| 3sealed | 122 | Hall, Jon (1500) | Won 2-0 | +181487 |
| 4sealed | 91 | Hanford, Charlie (1353) | Lost 0-2 | -201467 |
| 5sealed | 132 | Hawkins, Brandon (1508) | Lost 0-2 | -171450 |
| top | average opponent: 1458record: 2-3 | new rating: 1450 | ||
| Grand Prix Minneapolis 2005 (Kamigawa block) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 10 | Rotchadl, Tom (1500) | Won 2-1 | +191463 |
| 3block | 29 | Wilczek, Robert (1535) | Lost 1-2 | -171446 |
| 4block | 60 | Schraeder, Aaron (1518) | Won 2-0 | +201466 |
| 5block | 67 | Orsi, Tony (1480) | Won 2-1 | +181484 |
| 6block | 26 | Stevens, Matthew (1522) | Lost 1-2 | -171467 |
| 7block | 59 | Watson, Robert D (1557) | Won 2-1 | +191486 |
| 8block | 50 | Turtenwald, Owen (1505) | Lost 0-2 | -171469 |
| top | average opponent: 1517record: 4-3 | new rating: 1469 | ||
| Grand Prix Kansas City 2003 (MRD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 69 | Katz, Matthew (1500) | Lost 0-2 | -181482 |
| 3sealed | 107 | Simmons, Jeremy (1393) | Lost 0-2 | -201462 |
| 4sealed | 185 | Vaughn, Daniel (1443) | Lost 1-2 | -181444 |
| top | average opponent: 1445record: 0-3 | new rating: 1444 | ||