Omasa, Yoshitaka
Current rating: 1457
| Grand Prix Matsuyama 2005 (BOK limited) | starting rating: 1430 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 76 | Fujita, Keisuke (1521) | Lost 0-2 | -171413 |
| 2sealed | 134 | Sugimoto, Masayuki (1482) | Won 2-0 | +201433 |
| 3sealed | 118 | Fukui, Shouichi (1500) | Won 2-0 | +191452 |
| 4sealed | 125 | Aizawa, Keiji (1707) | Won 2-1 | +221474 |
| 5sealed | 56 | Nagamine, Kazuki (1532) | Lost 0-2 | -171457 |
| top | average opponent: 1548record: 3-2 | new rating: 1457 | ||
| Grand Prix Okayama 2004 (extended) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 109 | Ashida, Jun (1500) | Draw 1-1 | +11464 |
| 2extended | 103 | Hitomi, Masaaki (1499) | Won 2-0 | +191483 |
| 3extended | 71 | Takagi, Takeshi (1545) | Lost 0-2 | -171466 |
| 4extended | 136 | Tanaka, Yoshinori (1482) | Lost 0-2 | -181448 |
| 5extended | 154 | Yamada, Uchu (1422) | Lost 1-2 | -181430 |
| top | average opponent: 1490record: 1-3-1 | new rating: 1430 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 111 | Yoshinobu, Takashi (1445) | Lost 0-2 | -191481 |
| 2extended | 134 | Saitou, Hiroaki (1500) | Lost 0-2 | -181463 |
| 3extended | 162 | Miyake, Takaaki (1463) | Won 2-1 | +181481 |
| 4extended | 155 | Nagata, Satoshi (1480) | Lost 0-2 | -181463 |
| top | average opponent: 1472record: 1-3 | new rating: 1463 | ||