Booker, Joseph
Current rating: 1405
Record: 6-12
| Grand Prix Richmond 2019 (ELD standard) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 33 | Rocha, Daniel (1428) | Won 2-0 | +181451 |
| 2standard | 52 | Jezyna, Maciej (1577) | Lost 0-2 | -151436 |
| 3standard | 237 | Pascal, Brandon (1655) | Lost 0-2 | -151421 |
| 4standard | 227 | Frank, Avery (1481) | Lost 0-2 | -161405 |
| top | average opponent: 1535record: 1-3 | new rating: 1405 | ||
| Grand Prix Washington DC 2019 (MH1 limited) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 283 | Weller, Rachel (1520) | Won 2-0 | +191487 |
| 2sealed | 250 | Tollison, John (1412) | Lost 0-0 | -191468 |
| 3sealed | 382 | Bennett, Alfred (1521) | Won 2-1 | +191487 |
| 4sealed | 197 | Lewis, Christopher (1661) | Lost 1-2 | -151472 |
| 5sealed | 297 | Groner, Joshua (1329) | Lost 0-2 | -201452 |
| 6sealed | 337 | Mangold, Andy (1441) | Lost 0-2 | -191433 |
| top | average opponent: 1481record: 2-4 | new rating: 1433 | ||
| Grand Prix New Jersey 2019 (RNA limited) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 244 | Wilk, Marissa (1486) | Lost 0-2 | -181469 |
| 2sealed | 445 | Rinke De Wit, Leonoor (1436) | Won 2-1 | +171486 |
| 3sealed | 452 | Hayashi, Fumitaka (1490) | Lost 1-2 | -181468 |
| top | average opponent: 1471record: 1-2 | new rating: 1468 | ||
| Grand Prix Richmond 2018 (std) (M19 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 108 | Bradley, John (1500) | Won 2-1 | +181518 |
| 2standard | 44 | Steven, Austen (1527) | Lost 0-2 | -181500 |
| 3standard | 313 | Johnson, Larry (1360) | Won 2-0 | +161516 |
| 4standard | 223 | Maginnis, Peter (1951) | Lost 1-2 | -111505 |
| 5standard | 225 | Bailey, Jonathon (1502) | Lost 1-2 | -181487 |
| top | average opponent: 1568record: 2-3 | new rating: 1487 | ||