Isomoto, Hirofumi
Current rating: 1527
Record: 30-27-5
| Grand Prix Kyoto 2007 (PLC standard) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 190 | Hayakawa, Toshiaki (1518) | Won 2-0 | +181514 |
| 2standard | 73 | Mori, Yuuya (1517) | Won 2-0 | +181532 |
| 3standard | 49 | Nakamura, Takuya (1536) | Won 2-0 | +181550 |
| 4standard | 18 | Saito, Tomoharu (2030) | Lost 1-2 | -101540 |
| 5standard | 58 | Takamatsu, Hiroomi (1600) | Won 2-1 | +191559 |
| 6standard | 70 | Yotsumoto, Yuki (1536) | Lost 1-2 | -181541 |
| 7standard | 106 | Maruyama, Kentarou (1404) | Draw 1-1 | -31538 |
| 8standard | 118 | Oiso, Masashi (1810) | Draw 1-1 | +51543 |
| 9standard | 125 | Tanaka, Yousuke (1640) | Lost 0-2 | -161527 |
| top | average opponent: 1621record: 4-3-2 | new rating: 1527 | ||
| Grand Prix Hiroshima 2006 (CSP limited) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 106 | Takanashi, Kouji (1500) | Won 2-0 | +181514 |
| 2sealed | 27 | Tominaga, Mario (1454) | Lost 1-2 | -191495 |
| 3sealed | 73 | Kimura, Shigeki (1497) | Won 2-1 | +181513 |
| 4sealed | 87 | Omichi, Nobuhito (1530) | Lost 1-2 | -171496 |
| top | average opponent: 1495record: 2-2 | new rating: 1496 | ||
| Grand Prix Niigata 2005 (Kamigawa block) | starting rating: 1512 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 3 | Suzuki, Youhei (1544) | Draw 1-1 | 01512 |
| 3block | 77 | Tanaka, Hiroshi (1531) | Draw 0-0 | +11513 |
| 4block | 155 | Igarashi, Kenta (1518) | Won 2-0 | +181531 |
| 5block | 111 | Okada, Daisuke (1667) | Lost 1-2 | -161515 |
| 6block | 139 | Satou, Yoshinobu (1502) | Won 2-0 | +181533 |
| 7block | 104 | Oodan, Takeshi (1502) | Lost 0-2 | -191514 |
| 8block | 103 | Trett, Carl A (1514) | Lost 0-2 | -181496 |
| top | average opponent: 1540record: 2-3-2 | new rating: 1496 | ||
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1598 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 44 | Katayama, Hironori (1500) | Lost 0-2 | -191579 |
| 2sealed | 302 | Shimizu, Motohiro (1483) | Lost 1-2 | -201559 |
| 3sealed | 275 | Watanabe, Hiroyuki (1394) | Lost 0-2 | -211538 |
| 4sealed | 289 | Sakurai, Yuusuke (1443) | Lost 1-2 | -201518 |
| 5sealed | 246 | Goto, Takahiro (1361) | Lost 0-2 | -211497 |
| 6sealed | 203 | Yasuda, Takuo (1425) | Draw 1-1 | -11496 |
| 8sealed | 35 | Katsumata, Yuuma (1361) | Won 2-0 | +161512 |
| top | average opponent: 1424record: 1-5-1 | new rating: 1512 | ||
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1610 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 236 | Mino, Tetsuya (1446) | Lost 1-2 | -211589 |
| 2standard | 254 | Kobori, Tetsuhiro (1385) | Won 2-0 | +151604 |
| 3standard | 270 | Sato, Naoki (1499) | Lost 1-2 | -201584 |
| 4standard | 311 | Matsubayashi, Masahiro (1469) | Won 2-1 | +161600 |
| 5standard | 337 | Yamauchi, Shou (1484) | Won 2-1 | +161616 |
| 6standard | 170 | Murakami, Yuuki (1657) | Lost 0-2 | -181598 |
| top | average opponent: 1490record: 3-3 | new rating: 1598 | ||
| Grand Prix Okayama 2004 (extended) | starting rating: 1605 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 35 | Kojima, Yoshimasa (1505) | Lost 1-2 | -191586 |
| 2extended | 129 | Sakaguchi, Takashi (1429) | Won 2-0 | +151601 |
| 3extended | 83 | Toyota, Hiroki (1498) | Won 2-0 | +161617 |
| 4extended | 67 | Nose, Koji (1551) | Lost 0-2 | -191598 |
| 5extended | 99 | Okamoto, Kazuma (1500) | Lost 1-2 | -201578 |
| 6extended | 126 | Aoki, Yasunori (1481) | Won 2-1 | +161594 |
| 7extended | 96 | Nakamura, Kunihiro (1506) | Won 2-0 | +161610 |
| top | average opponent: 1496record: 4-3 | new rating: 1610 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1592 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 31 | Edayoshi, Minoru (1467) | Won 2-0 | +151607 |
| 2sealed | 102 | Kai, Tsubasa (1518) | Won 2-0 | +171624 |
| 3sealed | 67 | Koyashiki, Tsutomu (1536) | Won 2-0 | +161640 |
| 4sealed | 33 | Suzuki, Masatsuna (1644) | Won 2-0 | +181658 |
| 5sealed | 20 | Mori, Katsuhiro (1896) | Lost 0-2 | -141644 |
| 6sealed | 44 | Shimizu, Akihiro (1558) | Lost 0-2 | -191625 |
| 7sealed | 54 | Minashima, Nobuhiro (1538) | Lost 1-2 | -201605 |
| top | average opponent: 1594record: 4-3 | new rating: 1605 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 323 | Tago, Daisuke (1517) | Won 2-0 | +181518 |
| 3block | 119 | Kurita, Daisuke (1536) | Won 2-1 | +191537 |
| 4block | 134 | Yamada, Tsutomu (1568) | Won 2-1 | +181555 |
| 5block | 26 | Kushibe, Toshiki (1469) | Won 2-1 | +171572 |
| 6block | 28 | Hirata, Shinya (1570) | Lost 1-2 | -181554 |
| 7block | 26 | Hasegawa, Takumi (1554) | Lost 0-2 | -181536 |
| 8block | 148 | Mihara, Makihito (1503) | Won 2-0 | +171553 |
| 9block | 64 | Nishioka, Kazuya (1540) | Won 2-1 | +181571 |
| 10block | 49 | Harino, Takuichi (1532) | Lost 0-2 | -191552 |
| 11block | 53 | Date, Tsutomu (1553) | Won 2-1 | +181570 |
| 12block | 46 | Matsuo, Koichiro (1629) | Won 2-1 | +191589 |
| 13block | 20 | Morofuji, Takuma (1574) | Lost 0-2 | -181571 |
| 14block | 44 | Sasakawa, Tomohide (1671) | Lost 1-2 | -161555 |
| 15block | 41 | Kagami, Gen (1576) | Won 2-0 | +181573 |
| 16block | 36 | Adachi, Takatsugu (1603) | Won 2-1 | +191592 |
| top | average opponent: 1560record: 10-5 | new rating: 1592 | ||