Guff, John
Current rating: 1446
Record: 0-3
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 35 | Jones, Adrian (1482) | Lost 1-2 | -181482 |
| 2modern | 507 | Elguea, Austin (1476) | Lost 0-2 | -181464 |
| 3modern | 676 | Porter, Sarah (1469) | Lost 1-2 | -181446 |
| average opponent: 1476record: 0-3 | new rating: 1446 | |||