Horton, Marshall
Current rating: 1540
Record: 5-3
| Grand Prix Tampa Bay 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 62 | Knight, Christopher (1578) | Won 2-0 | +191519 |
| 2modern | 126 | Garcia, Anthony (1558) | Lost 0-2 | -171502 |
| 3modern | 362 | Dorsey, Kyle (1624) | Lost 0-2 | -161486 |
| 4modern | 313 | Solis, Juan (1528) | Won 2-1 | +191505 |
| 5modern | 240 | Williams, Zachary (1474) | Won 2-0 | +181523 |
| 6modern | 266 | Spradley, Winston (1667) | Lost 1-2 | -161507 |
| 7modern | 245 | Kaipainen, Anttu (1341) | Won 2-0 | +151522 |
| 8modern | 174 | Ricker, Troy (1519) | Won 2-1 | +181540 |
| average opponent: 1536record: 5-3 | new rating: 1540 | |||