Yamagata, Masashi
Current rating: 1459
| Grand Prix Kobe 2012 (DKA limited) | starting rating: 1495 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 294 | Tachibana, Takahiro (1522) | Lost 0-2 | -171478 |
| 2sealed | 379 | Kubomi, Yusuke (1438) | Lost 0-2 | -191459 |
| 3sealed | 479 | Itou, Shin'ya (1463) | Won 1-0 | +181477 |
| 4sealed | 377 | Yamada, Atsushi (1471) | Lost 1-2 | -181459 |
| top | average opponent: 1473record: 1-3 | new rating: 1459 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 370 | Hirose, Kazuhiro (1500) | Won 2-0 | +191484 |
| 2extended | 27 | Tsukamoto, Tatsushi (1416) | Won 2-1 | +161500 |
| 3extended | 38 | Ishikawa, Shou (1792) | Won 2-0 | +231523 |
| 4extended | 102 | Ootsuka, Koutarou (1923) | Lost 0-2 | -111512 |
| 5extended | 143 | Takahashi, Tomoki (1535) | Won 2-1 | +191531 |
| 6extended | 88 | Satou, Noboru (1575) | Lost 1-2 | -171514 |
| 7extended | 142 | Suzuki, Ryuuichi (1484) | Lost 1-2 | -191495 |
| top | average opponent: 1604record: 4-3 | new rating: 1495 | ||
| Grand Prix Kobe 2008 (Lorwyn block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 129 | Kanegawa, Toshiya (1500) | Won 2-1 | +181518 |
| 2block | 43 | Sawade, Makoto (1498) | Lost 1-2 | -181500 |
| 3block | 148 | Imada, Koji (1500) | Won 2-1 | +181518 |
| 4block | 162 | Hasegawa, Hironobu (1620) | Lost 1-2 | -161502 |
| 5block | 237 | Juumonji, Ryou (1544) | Lost 0-2 | -181484 |
| 6block | 249 | Kang, Sung Mook (1409) | Lost 0-2 | -191465 |
| top | average opponent: 1512record: 2-4 | new rating: 1465 | ||