Shaffer, Charles
Current rating: 1427
Record: 0-4
| Grand Prix Phoenix 2020 (pioneer) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 177 | Yu, Terry (1500) | Lost 1-2 | -181445 |
| 2pioneer | 288 | Golubchik, Daniel (1396) | Lost 0-2 | -181427 |
| average opponent: 1448record: 0-2 | new rating: 1427 | |||
| Grand Prix Los Angeles 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 190 | Caban, Allen (1505) | Lost 0-2 | -181482 |
| 2modern | 403 | DeLoach, Olivia (1410) | Lost 0-2 | -191463 |
| average opponent: 1457record: 0-2 | new rating: 1463 | |||