Hyakusai, Kouichi
Current rating: 1392
| Grand Prix Okayama 2004 (extended) | starting rating: 1437 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 57 | Hitomi, Masaaki (1500) | Draw 0-0 | +11438 |
| 2extended | 105 | Kuriyama, Masaaki (1499) | Lost 0-1 | -171421 |
| 3extended | 154 | Shiojiri, Kazuhito (1481) | Won 2-0 | +191440 |
| 4extended | 135 | Ayama, Takashi (1624) | Lost 0-2 | -151425 |
| 5extended | 155 | Toochika, Takayuki (1512) | Draw 1-1 | +21427 |
| 6extended | 145 | Inanaga, Nobuyuki (1450) | Draw 0-0 | 01427 |
| 7extended | 117 | Takahashi, Katsuhiko (1461) | Lost 0-2 | -171410 |
| 8extended | 103 | Akita, Naoto (1437) | Lost 0-2 | -181392 |
| top | average opponent: 1495record: 1-4-3 | new rating: 1392 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1426 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 1 | Kobashi, Hideto (1465) | Lost 0-2 | -171409 |
| 2extended | 110 | Takayama, Ryou (1482) | Lost 1-2 | -171392 |
| 3extended | 178 | Nakamura, Kiyonari (1482) | Lost 0-2 | -161376 |
| 4extended | 187 | Miyake, Takaaki (1445) | Won 2-1 | +191395 |
| 5extended | 167 | Saito, Ryo (1482) | Won 2-0 | +201415 |
| 6extended | 144 | Akamatsu, Satoshi (1481) | Lost 0-1 | -171398 |
| 7extended | 122 | Takahama, Norimasa (1483) | Won 2-0 | +191417 |
| 8extended | 91 | Vanderburg, Aaron B (1484) | Won 2-1 | +201437 |
| top | average opponent: 1475record: 4-4 | new rating: 1437 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 23 | Tanaka, Motoyasu (1500) | Lost 0-2 | -181482 |
| 2sealed | 166 | Wakabayashi, Kiyoshi (1351) | Lost 0-2 | -201462 |
| 3sealed | 180 | Akahori, Hiroaki (1484) | Lost 1-2 | -181444 |
| 4sealed | 198 | Suga, Takayuki (1446) | Draw 1-1 | 01444 |
| 5sealed | 181 | Yamao, Kouichi (1445) | Lost 1-2 | -181426 |
| top | average opponent: 1445record: 0-4-1 | new rating: 1426 | ||