Ishimoto, Koichi
Current rating: 1456
Record: 13-16
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 122 | Yokoyama, Tatsuya (1500) | Won 2-0 | +191506 |
| 2sealed | 111 | Okada, Takuma (1518) | Lost 1-2 | -181488 |
| 3sealed | 193 | Mayuzumi, Shinichi (1535) | Lost 0-2 | -171471 |
| 4sealed | 222 | Kamai, Daisuke (1483) | Won 2-0 | +181489 |
| 5sealed | 191 | Fukuchi, Takahiro (1634) | Won 2-0 | +201509 |
| 6sealed | 134 | Tamura, Takashi (1517) | Lost 0-2 | -171492 |
| 7sealed | 142 | Sugiyama, Kouichi (1527) | Lost 1-2 | -181474 |
| 8sealed | 125 | Matsuyama, Hikaru (1484) | Lost 0-2 | -181456 |
| top | average opponent: 1525record: 3-5 | new rating: 1456 | ||
| Grand Prix Sendai 2001 (extended) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 56 | Ito, Ken (1578) | Won 2-0 | +191517 |
| 3extended | 78 | Nakajima, Chikara (1552) | Lost 0-2 | -171500 |
| 4extended | 131 | Date, Tsutomu (1518) | Won 2-0 | +181518 |
| 5extended | 48 | Fujita, Osamu (1626) | Lost 0-2 | -161502 |
| 6extended | 85 | Kashiwamura, Hideaki (1518) | Lost 1-2 | -171485 |
| 7extended | 110 | Ogiyama, Shuuji (1543) | Won 2-1 | +191504 |
| 8extended | 80 | Adachi, Shingo (1592) | Lost 1-2 | -171487 |
| top | average opponent: 1561record: 3-4 | new rating: 1487 | ||
| Grand Prix Shizuoka 2001 (ODY limited) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 204 | Sakamoto, Yuki (1519) | Lost 1-2 | -191517 |
| 2sealed | 208 | Makita, Kazeto (1482) | Lost 0-2 | -181499 |
| 3sealed | 317 | Matsumura, Takehiko (1478) | Won 2-1 | +171516 |
| 4sealed | 241 | Sunohara, Motoki (1483) | Lost 0-2 | -181498 |
| 5sealed | 245 | Nakanishi, Keisuke (1480) | Won 2-0 | +171515 |
| 6sealed | 189 | Murakami, Yuki (1604) | Won 2-1 | +201535 |
| 7sealed | 151 | Tsushima, Yusuke (1501) | Lost 0-2 | -191516 |
| 8sealed | 128 | Ueno, Shinichi (1499) | Lost 0-2 | -181498 |
| top | average opponent: 1506record: 3-5 | new rating: 1498 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 266 | Sawada, Kenshu (1500) | Won 2-1 | +181518 |
| 2block | 166 | Kochi, Takashi (1518) | Lost 1-2 | -181500 |
| 3block | 497 | Matsubara, Hideki (1500) | Won 2-1 | +181518 |
| 4block | 262 | Hamamoto, Kenji (1438) | Won 2-0 | +171535 |
| 5block | 157 | Arita, Ryuichi (1570) | Lost 1-2 | -181517 |
| 6block | 274 | Maruyama, Satoshi (1534) | Won 2-1 | +191536 |
| top | average opponent: 1510record: 4-2 | new rating: 1536 | ||