Ernst, Corey
Current rating: 1425
Record: 3-7
| Grand Prix Minneapolis 2018 (M19 limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 103 | Petersen, Andrew (1466) | Lost 1-2 | -191480 |
| 2sealed | 411 | Haas, Zachary (1461) | Lost 0-2 | -181462 |
| 3sealed | 575 | Kesher, Max (1467) | Lost 1-2 | -181444 |
| 4sealed | 611 | Kelley, Erin (1379) | Lost 0-2 | -191425 |
| average opponent: 1443record: 0-4 | new rating: 1425 | |||
| Grand Prix Madison 2015 (BFZ limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 202 | Strom, Andrew (1500) | Lost 0-2 | -181482 |
| 2sealed | 576 | Boyle, Paul (1482) | Won 2-0 | +181500 |
| 3sealed | 596 | Casper, Thomas (1437) | Lost 1-2 | -191481 |
| 4sealed | 657 | Borowicz, Nick (1484) | Lost 0-2 | -181463 |
| 5sealed | 600 | Shelton, Heather (1464) | Won 2-1 | +181481 |
| 6sealed | 454 | Butcher, Toby (1480) | Won 2-0 | +181499 |
| average opponent: 1475record: 3-3 | new rating: 1499 | |||