Costner, Gary
Current rating: 1469
Record: 4-6
| Grand Prix Kansas City 2019 (WAR standard) | starting rating: 1505 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 294 | Rowlett, Michael (1461) | Won 2-1 | +171522 |
| 2standard | 162 | Hollars, Shane (1506) | Lost 1-2 | -181504 |
| 3standard | 264 | Livingston, Cooper (1515) | Lost 0-2 | -181486 |
| 4standard | 336 | Pasley, Trevor (1522) | Lost 0-0 | -171469 |
| average opponent: 1501record: 1-3 | new rating: 1469 | |||
| Grand Prix Memphis 2019 (RNA standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 97 | Singer, Justin (1500) | Won 2-1 | +181518 |
| 2standard | 127 | Henderson, Alexander (1518) | Lost 1-2 | -181500 |
| 3standard | 303 | Cook, Ethan (1578) | Won 2-0 | +191519 |
| 4standard | 213 | Young, Brad (1546) | Won 2-1 | +191538 |
| 5standard | 150 | Robin, Alex (1520) | Lost 1-2 | -181520 |
| 6standard | 234 | Xia, Erdong (1694) | Lost 0-2 | -151505 |
| average opponent: 1559record: 3-3 | new rating: 1505 | |||