Akiba, Masakazu
Current rating: 1429
| Grand Prix Yamagata 2006 (TSP limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 46 | Sakakibara, Wataru (1500) | Lost 0-2 | -171447 |
| 2sealed | 120 | Takahashi, Atsushi (1482) | Lost 0-2 | -181429 |
| top | average opponent: 1491record: 0-2 | new rating: 1429 | ||
| Grand Prix Sendai 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 75 | Satou, Kenji (1516) | Lost 0-2 | -181482 |
| 2sealed | 145 | Aizawa, Atsuo (1478) | Lost 0-2 | -181464 |
| 3sealed | 223 | Sogabe, Takashi (1463) | Draw 1-1 | 01464 |
| 4sealed | 235 | Abe, Hiroshi(Tochigi) (1464) | Won 2-0 | +181482 |
| 5sealed | 184 | Hasegawa, Shigeyuki (1479) | Lost 0-2 | -181464 |
| top | average opponent: 1480record: 1-3-1 | new rating: 1464 | ||
| Grand Prix Sendai 2001 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 51 | Sakaibara, Masashi (1500) | Won 2-1 | +181518 |
| 2extended | 2 | Fukushima, Ryuji (1518) | Lost 1-2 | -181500 |
| 3extended | 107 | Izumi, Shinji (1537) | Lost 0-2 | -171483 |
| 4extended | 157 | Kataoka, Michiaki (1430) | Won 2-1 | +171500 |
| top | average opponent: 1496record: 2-2 | new rating: 1500 | ||