Jeffers, David
Current rating: 1483
| Grand Prix Kansas City 2019 (WAR standard) | starting rating: 1492 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 5 | Scutti, Adam (1518) | Lost 1-2 | -171475 |
| 3standard | 341 | Flowers, Van (1447) | Won 2-0 | +171492 |
| 4standard | 238 | Winter, Richard (1394) | Lost 0-0 | -191473 |
| 5standard | 231 | Wade, Samuel (1605) | Won 2-0 | +201493 |
| 6standard | 181 | Ayers, Brandon (1931) | Lost 0-2 | -101483 |
| top | average opponent: 1579record: 2-3 | new rating: 1483 | ||
| Grand Prix Memphis 2018 (RIX standard) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 171 | Edington, Jesse (1651) | Won 2-1 | +201542 |
| 2standard | 85 | Legg, Ryan (1503) | Won 2-0 | +181560 |
| 3standard | 200 | Seck, Ben (1794) | Lost 0-2 | -141546 |
| 4standard | 211 | Passarelli, Hayden (1717) | Lost 1-2 | -151531 |
| 5standard | 416 | Fagan, Christian (1508) | Lost 0-2 | -191512 |
| 6standard | 350 | Brawner, Mikhail (1459) | Lost 0-2 | -191493 |
| 7standard | 344 | Cook, Caleb (1466) | Won 2-0 | +181511 |
| 8standard | 255 | Ratliff, Dane (1481) | Lost 1-2 | -191492 |
| top | average opponent: 1572record: 3-5 | new rating: 1492 | ||
| Grand Prix Omaha 2017 (AKH standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 103 | Smith, Barry (1670) | Lost 1-2 | -151485 |
| 2standard | 297 | Allison, Edward (1483) | Won 2-0 | +181503 |
| 3standard | 237 | Ragusa, Joshua (1497) | Won 2-0 | +181521 |
| 4standard | 161 | Batrez, Victor (1487) | Won 2-0 | +171538 |
| 5standard | 140 | Hort, Tyler (1538) | Lost 0-2 | -181520 |
| 6standard | 195 | Hu, Ruochen (1536) | Won 2-0 | +191539 |
| 7standard | 114 | Siruta, McCellan (1538) | Lost 1-2 | -181521 |
| 8standard | 141 | Brooks, Paul (1593) | Lost 1-2 | -171504 |
| 9standard | 204 | Manasil, Nik (1509) | Won 2-1 | +181522 |
| top | average opponent: 1539record: 5-4 | new rating: 1522 | ||