Horton, John B
Current rating: 1481
Record: 2-3
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 544 | Levesque, Kevin (1464) | Won 2-0 | +171517 |
| 2sealed | 460 | Vargas, Francisco (1519) | Won 2-1 | +181535 |
| 3sealed | 430 | Walendziak, Craig (1476) | Lost 0-2 | -191516 |
| 4sealed | 599 | Stubbs, Dan (1520) | Lost 0-2 | -181498 |
| 5sealed | 601 | Szolopiak, James (1561) | Lost 0-2 | -171481 |
| average opponent: 1508record: 2-3 | new rating: 1481 | |||