Grosofsky, Jonathan
Current rating: 1449
Record: 1-4
| Grand Prix Columbus 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 74 | Idoni, Jacob (1500) | Won 2-0 | +181518 |
| 2modern | 8 | Tuuk, Justin (1482) | Lost 1-2 | -191499 |
| 3modern | 268 | Schnake, Abe (1674) | Lost 0-2 | -141485 |
| 4modern | 290 | Spry, Richard (1426) | Lost 1-2 | -201465 |
| 5modern | 272 | Mayer, Andrew (1559) | Lost 0-2 | -161449 |
| average opponent: 1528record: 1-4 | new rating: 1449 | |||