Giebel, Mason
Current rating: 1435
Record: 0-4-1
| Grand Prix Columbus 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 68 | Gwirtsman, Benjamin (1577) | Lost 1-2 | -171483 |
| 2modern | 199 | Townsend, Peter (1427) | Draw 1-1 | -11482 |
| 3modern | 274 | Rentz, Matt (1516) | Lost 1-2 | -171465 |
| 4modern | 293 | Kiesling, Jeffrey (1467) | Lost 0-2 | -181447 |
| 5modern | 277 | Cecchetti, Daniel (1759) | Lost 0-2 | -121435 |
| average opponent: 1549record: 0-4-1 | new rating: 1435 | |||