Ishibashi, Akitomo
Current rating: 1235
Record: 5-23-1
| Grand Prix Kitakyushu 2007 (LRW limited) | starting rating: 1279 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2 | Kato, Akinori (1510) | Won 2-0 | +231302 |
| 2sealed | 11 | Hayashi, Nobuyoshi (1535) | Lost 1-2 | -141288 |
| 3sealed | 114 | Furujou, Takashi (1428) | Won 2-1 | +201308 |
| 4sealed | 64 | Itou, Takanori (1429) | Lost 0-2 | -151293 |
| 5sealed | 89 | Kikuchi, Yuuji (1488) | Lost 1-2 | -151278 |
| 6sealed | 117 | Hishida, Akinori (1562) | Lost 0-2 | -131265 |
| 7sealed | 48 | Hamada, Junji (1488) | Lost 1-2 | -141251 |
| 8sealed | 81 | Abe, Motoki (1342) | Lost 0-2 | -161235 |
| top | average opponent: 1473record: 2-6 | new rating: 1235 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1347 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 37 | Nakamura, Kiyonari (1522) | Won 2-1 | +211368 |
| 2extended | 40 | Furuichi, Takenori (1578) | Lost 0-2 | -141354 |
| 3extended | 122 | Konishi, Hideaki (1483) | Draw 1-1 | +21356 |
| 4extended | 123 | Shimada, Takashi (1467) | Lost 0-1 | -161340 |
| 5extended | 149 | Tajimi, Yuki (1499) | Lost 0-2 | -151325 |
| 6extended | 147 | Tomihara, Shinsuke (1476) | Lost 0-2 | -151310 |
| 7extended | 129 | Omori, Ken'ichirou (1448) | Lost 0-2 | -161294 |
| 8extended | 106 | Liu, Marco Kwang-Ju (1481) | Lost 0-2 | -151279 |
| top | average opponent: 1494record: 1-6-1 | new rating: 1279 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 112 | Nomura, Shintaro (1500) | Lost 0-2 | -171430 |
| 2sealed | 150 | Miyake, Tetsuya (1616) | Lost 1-2 | -151415 |
| 3sealed | 169 | Saitou, Hiroaki (1464) | Lost 0-2 | -171398 |
| 4sealed | 196 | Tomita, Kayoko (1446) | Lost 0-2 | -171381 |
| 6sealed | 158 | Hijiya, Masayuki (1447) | Lost 1-2 | -171364 |
| 7sealed | 144 | Yoshioka, Hideki (1379) | Lost 0-2 | -171347 |
| top | average opponent: 1475record: 0-6 | new rating: 1347 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 166 | Tsuru, Kazuhiro (1500) | Lost 0-2 | -181482 |
| 2sealed | 185 | Nakashiro, Mizuki (1553) | Won 2-0 | +191501 |
| 3sealed | 104 | Inaba, Toyohiko (1500) | Lost 0-2 | -181483 |
| 4sealed | 138 | Joo, On Young (1484) | Won 2-0 | +181501 |
| 5sealed | 113 | Kurasawa, Kanto (1500) | Lost 0-2 | -181483 |
| 6sealed | 125 | Fujimoto, Takehiro (1481) | Lost 0-2 | -181465 |
| 7sealed | 115 | Yamasaki, Sadaharu (1463) | Lost 0-2 | -181447 |
| top | average opponent: 1497record: 2-5 | new rating: 1447 | ||