Kobashi, Hideto
Current rating: 1440
Record: 19-24-4
| Grand Prix Hiroshima 2006 (CSP limited) | starting rating: 1431 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 103 | Mukaino, Tomohiro (1483) | Won 2-1 | +191450 |
| 2sealed | 60 | Janz, Carl (1517) | Lost 0-2 | -161434 |
| 3sealed | 141 | Kougo, Toshihide (1577) | Lost 0-2 | -161418 |
| 4sealed | 141 | Mouri, Azuma (1483) | Lost 0-2 | -171401 |
| 5sealed | 145 | Hashimoto, Yoshiki (1478) | Won 2-0 | +201421 |
| 6sealed | 121 | Nagashima, Yuji (1403) | Won 2-0 | +171438 |
| 7sealed | 71 | Matsuzaka, Atsushi (1448) | Lost 0-2 | -171421 |
| 8sealed | 45 | Minematsu, Kouzou (1493) | Won 2-0 | +191440 |
| top | average opponent: 1485record: 4-4 | new rating: 1440 | ||
| Grand Prix Matsuyama 2005 (BOK limited) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 3 | Imori, Takahiro (1573) | Draw 1-1 | +21464 |
| 2sealed | 105 | Shimada, Hiroya (1499) | Lost 0-2 | -171447 |
| 3sealed | 149 | Iwai, Takanori (1373) | Won 2-1 | +161463 |
| 4sealed | 137 | Fujitsuka, Shougo (1581) | Lost 0-2 | -161447 |
| 5sealed | 154 | Katsuta, Souichi (1559) | Lost 0-2 | -161431 |
| top | average opponent: 1517record: 1-3-1 | new rating: 1431 | ||
| Grand Prix Okayama 2004 (extended) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 14 | Itano, Masao (1485) | Lost 1-2 | -181481 |
| 2extended | 124 | Ikedo, Masakazu (1534) | Won 2-0 | +191500 |
| 3extended | 125 | Niiyama, Masahiro (1415) | Won 2-0 | +161516 |
| 4extended | 61 | Miura, Hiroyuki (1495) | Lost 0-2 | -181498 |
| 5extended | 136 | Suzuki, Yoshihiro (1497) | Won 2-1 | +181516 |
| 6extended | 65 | Fukuda, Takashi (1497) | Lost 0-2 | -181498 |
| 7extended | 97 | Oota, Hideaki (1498) | Lost 0-2 | -181480 |
| 8extended | 89 | Nakamura, Kunihiro (1489) | Lost 1-2 | -181462 |
| top | average opponent: 1489record: 3-5 | new rating: 1462 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 1 | Hyakusai, Kouichi (1426) | Won 2-0 | +171482 |
| 2extended | 86 | Shimada, Masatake (1736) | Lost 1-2 | -141468 |
| 3extended | 89 | Kakumae, Teruya (1484) | Won 2-0 | +191487 |
| 4extended | 92 | Nagase, Shougo (1467) | Won 2-1 | +171504 |
| 5extended | 71 | Suzuki, Kenta (1582) | Lost 0-2 | -161488 |
| 6extended | 96 | Imagawa, Hiromasa (1494) | Won 2-0 | +181506 |
| 7extended | 55 | Harino, Takuichi (1521) | Won 2-1 | +181524 |
| 8extended | 36 | Takahashi, Yuuki (1539) | Won 2-1 | +181542 |
| 9extended | 24 | Nakajima, Jun-Ichi (1592) | Draw 1-1 | +11543 |
| 10extended | 21 | Asahara, Akira (1876) | Lost 0-2 | -121531 |
| 11extended | 26 | Lee, Ji-Hoon (1586) | Lost 0-2 | -171514 |
| 12extended | 29 | Komiyama, Hideki (1633) | Won 2-1 | +201534 |
| 13extended | 25 | Okada, Hiroaki (1548) | Lost 1-2 | -181516 |
| 14extended | 26 | Ikedo, Masakazu (1562) | Lost 0-2 | -171499 |
| top | average opponent: 1575record: 7-6-1 | new rating: 1499 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 72 | Isoda, Yusuke (1500) | Won 2-1 | +181519 |
| 2block | 317 | Ogiyama, Shuuji (1483) | Lost 0-2 | -181501 |
| 3block | 362 | Kojima, Junichi (1500) | Lost 0-2 | -181483 |
| 4block | 524 | Sawada, Naoya (1483) | Lost 0-2 | -181465 |
| 5block | 548 | Ohnishi, Jyunpei (1463) | Draw 1-1 | 01465 |
| top | average opponent: 1486record: 1-3-1 | new rating: 1465 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 28 | Yagi, Masahiro (1500) | Draw 1-1 | 01500 |
| 2sealed | 110 | Watanabe, Sho (1500) | Won 2-1 | +181518 |
| 3sealed | 69 | Mikami, Kazuya (1518) | Lost 0-2 | -181500 |
| 4sealed | 125 | Takamori, Hiroaki (1500) | Lost 0-2 | -181482 |
| 5sealed | 143 | Saito, Takanobu (1483) | Won 2-0 | +181500 |
| 6sealed | 107 | Yamasaki, Yudai (1567) | Won 2-0 | +191519 |
| 7sealed | 80 | Goda, Masayuki (1519) | Lost 0-2 | -181501 |
| top | average opponent: 1512record: 3-3-1 | new rating: 1501 | ||