Hartford, David T
Current rating: 1432
| Grand Prix Hong Kong 2013 (THS limited) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 73 | Sheykin, Timofey (1500) | Lost 0-2 | -171432 |
| top | record: 0-1 | new rating: 1432 | ||
| Grand Prix Kitakyushu 2013 (M14 standard) | starting rating: 1478 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 231 | Mizobuchi, Yuuji (1588) | Lost 0-2 | -161462 |
| 2standard | 403 | Inoue, Takeshi (1483) | Won 2-0 | +191481 |
| 3standard | 420 | Takagi, Takayuki (1745) | Lost 0-2 | -141467 |
| 4standard | 507 | Abe, Yuuta (1454) | Lost 0-2 | -181449 |
| top | average opponent: 1567record: 1-3 | new rating: 1449 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 751 | Tsukamoto, Tatsushi (1411) | Lost 1-2 | -201480 |
| 2sealed | 1060 | Kamioka, Masayuki (1474) | Won 2-1 | +181498 |
| 3sealed | 929 | Sakai, Tomohiro (1429) | Lost 1-2 | -191479 |
| 4sealed | 1003 | Yuuta, Maruyama (1480) | Won 2-0 | +181497 |
| 5sealed | 1036 | Imai, Masakatsu (1449) | Lost 0-2 | -191478 |
| top | average opponent: 1449record: 2-3 | new rating: 1478 | ||