Ewing, David
Current rating: 1482
Record: 5-7
| Grand Prix Oklahoma City 2019 (ELD standard) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 99 | Flug, Ben (1500) | Won 2-0 | +181491 |
| 2standard | 41 | Buck, William (1692) | Won 2-1 | +221513 |
| 3standard | 47 | Thomason, Timothy (1795) | Lost 1-2 | -131500 |
| 4standard | 88 | Legg, Jesse (1521) | Lost 0-2 | -181482 |
| average opponent: 1627record: 2-2 | new rating: 1482 | |||
| Grand Prix Detroit 2019 (M20 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 217 | Rentz, Matt (1568) | Won 2-1 | +191519 |
| 2sealed | 36 | McCormick, Philip (1433) | Won 2-0 | +171536 |
| 3sealed | 62 | Moazen-Sayad, Pedram (1757) | Lost 0-2 | -141522 |
| 4sealed | 218 | Bondy, Jonathan (1565) | Lost 1-2 | -181504 |
| 5sealed | 229 | Jablonski, Kevin (1494) | Won 2-1 | +181522 |
| 6sealed | 154 | Pham, Hoang Ha (1559) | Lost 0-2 | -171505 |
| 7sealed | 167 | Caldwell, Jason (1506) | Lost 0-2 | -181487 |
| 8sealed | 136 | Naylor, Andrew (1691) | Lost 1-2 | -141473 |
| average opponent: 1572record: 3-5 | new rating: 1473 | |||