Koura, Masahiro
Current rating: 1790 (#2486)
Record: 54-31-3
| Grand Prix Okayama 2004 (extended) | starting rating: 1743 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 55 | Ueno, Shinichi (1684) | Lost 1-2 | -191724 |
| 4extended | 62 | Yamada, Tsutomu (1675) | Won 2-0 | +171741 |
| 5extended | 67 | Maruyama, Tomohiro (1698) | Won 2-1 | +171758 |
| 6extended | 25 | Yokosuka, Tomohiro (1773) | Won 2-1 | +191777 |
| 7extended | 24 | Hirosawa, Yuuta (1668) | Won 2-1 | +161793 |
| 8extended | 10 | Takeda, Hiroki (1620) | Won 2-1 | +151808 |
| 9extended | 4 | Lee, Sang-Ryeol (1651) | Won 2-1 | +151823 |
| 10extended | 9 | Kawamura, Kazushi (1672) | Lost 0-2 | -211802 |
| 11extended | 8 | Doi, Asuka (1703) | Lost 0-2 | -201782 |
| 12extended | 17 | Tanaka, Hiroki (1549) | Lost 1-2 | -221760 |
| 13extended | 18 | Yanagisawa, Tadahiro (1579) | Won 2-1 | +151775 |
| 14extended | 24 | Matsumoto, Taiki (1610) | Won 2-0 | +151790 |
| top | average opponent: 1657record: 8-4 | new rating: 1790 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1711 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 136 | Umezawa, Shinobu (1529) | Won 2-0 | +151726 |
| 3block | 123 | Nobushita, Jun (1701) | Lost 0-2 | -191707 |
| 4block | 226 | Ota, Yusuke (1517) | Won 2-0 | +151722 |
| 5block | 48 | Fujihira, Taro (1521) | Won 2-1 | +141736 |
| 6block | 82 | Nakajima, Daisuke (1552) | Lost 1-2 | -211715 |
| 7block | 125 | Yoshioka, Yuki (1519) | Won 2-1 | +141729 |
| 8block | 44 | Kouno, Tomohiro (1579) | ID | 01729 |
| 9block | 72 | Adachi, Shingo (1662) | Won 2-0 | +171746 |
| 10block | 55 | Kobayashi, Hiroyuki (1563) | Lost 0-2 | -211725 |
| 11block | 84 | Takaishi, Yuuri (1555) | Won 2-0 | +151740 |
| 12block | 56 | Tanahashi, Masayasu (1572) | Won 2-0 | +151755 |
| 13block | 37 | Ito, Yoshimasa (1611) | Won 2-1 | +151770 |
| 14block | 22 | Eguchi, Sho (1600) | Won 2-1 | +151785 |
| 15block | 14 | Sakai, Yasuki (1648) | Lost 0-2 | -201765 |
| 16block | 26 | Kushibe, Toshiki (1574) | Lost 0-2 | -221743 |
| top | average opponent: 1580record: 9-5-1 | new rating: 1743 | ||
| Grand Prix Kyoto 2003 (LGN limited) | starting rating: 1670 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 46 | Fujita, Osamu (1800) | Lost 0-2 | -151655 |
| 5sealed | 107 | Nakamura, Kazuo (1537) | Won 2-1 | +151670 |
| 6sealed | 56 | Tamura, Ryo (1507) | Lost 1-2 | -211649 |
| 7sealed | 74 | Ootsuka, Koutarou (1437) | Won 2-1 | +151664 |
| 8sealed | 74 | Hirota, Yuzo (1564) | Won 2-1 | +161680 |
| 9draft | 24 | Arahori, Kazuaki (1689) | Won 2-0 | +181698 |
| 10draft | 23 | Shimura, Ichirou (1701) | Won 2-0 | +181716 |
| 11draft | 6 | Tsushima, Tomoya (1696) | Won 2-0 | +181734 |
| 12draft | 14 | Miyazaki, Hidetaka (1661) | Won 2-1 | +161750 |
| 13draft | 1 | Tashiro, Yoshiaki (1723) | Lost 1-2 | -181732 |
| 14draft | 2 | Shiwaku, Tsuyoshi (1573) | Lost 0-2 | -211711 |
| top | average opponent: 1626record: 7-4 | new rating: 1711 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1705 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 28 | Tanaka, Yoshinori (1494) | Lost 1-2 | -221683 |
| 3extended | 132 | Nakai, Kentaro (1500) | Lost 0-2 | -211662 |
| 4extended | 139 | Inanaga, Nobuyuki (1484) | Won 2-1 | +151677 |
| 5extended | 100 | Nagase, Shougo (1449) | Won 2-0 | +141691 |
| 6extended | 97 | Ueno, Shinichi (1551) | Lost 1-2 | -211670 |
| top | average opponent: 1496record: 2-3 | new rating: 1670 | ||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1704 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 65 | Fukuchi, Takahiro (1656) | Won 2-1 | +181722 |
| 3sealed | 38 | Orihara, Jun (1536) | Draw 1-1 | -41718 |
| 4sealed | 57 | Lee, Sang-Ryeol (1523) | Lost 0-2 | -211697 |
| 5sealed | 128 | Nakamura, Yusuke (1505) | Won 2-0 | +141711 |
| 6sealed | 80 | Suzuki, Yuuji (1543) | Draw 1-1 | -31708 |
| 7sealed | 107 | Sakamoto, Kazuya (1543) | Won 2-0 | +151723 |
| 8sealed | 136 | Shimada, Masatake (1717) | Lost 0-2 | -181705 |
| top | average opponent: 1575record: 3-2-2 | new rating: 1705 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1585 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 47 | Komatsu, Toshiaki (1561) | Won 2-1 | +171602 |
| 3sealed | 53 | Neki, Haruyuki (1480) | Won 2-0 | +161618 |
| 4sealed | 18 | Shikata, Nobuaki (1556) | Lost 1-2 | -191599 |
| 5sealed | 72 | Tanaka, Hisaya (1517) | Won 2-0 | +161615 |
| 6sealed | 37 | Yoo, Sang-oh (1556) | Won 2-0 | +171632 |
| 7sealed | 29 | Uchida, Momotarou (1530) | Won 2-1 | +161648 |
| 8draft | 12 | Kanda, Satoshi (1566) | Lost 0-2 | -191629 |
| 9draft | 22 | Murakami, Yuuki (Miyagi) (1694) | Won 2-1 | +191648 |
| 10draft | 10 | Tsujimoto, Hideki (1593) | Won 2-0 | +171665 |
| 11draft | 7 | Harada, Masahiro (1614) | Won 2-0 | +171682 |
| 12draft | 6 | Okamoto, Jin (1920) | Won 2-1 | +221704 |
| 13draft | 4 | Ishida, Itaru (1901) | ID | 01704 |
| top | average opponent: 1624record: 9-2-1 | new rating: 1704 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 47 | Kato, Yukisato (1518) | Won 2-0 | +171578 |
| 3block | 62 | Tominaga, Akira (1536) | Won 2-0 | +181596 |
| 4block | 41 | Fukata, Takamasa (1551) | Lost 1-2 | -191577 |
| 5block | 217 | Nakai, Ryoji (1515) | Lost 1-2 | -191558 |
| 6block | 291 | Okita, Yoichi (1516) | Won 2-0 | +171575 |
| 7block | 159 | Yamaguchi, Teruyuki (1518) | Won 2-0 | +171592 |
| 8block | 131 | Nishibata, Shunsuke (1554) | Won 2-1 | +171609 |
| 9block | 80 | Ishii, Keisuke (1591) | Won 2-0 | +181627 |
| 10block | 60 | Ikeda, Takashi (1590) | Lost 1-2 | -191608 |
| 11block | 51 | Kusaka, Tadateru (1557) | Lost 1-2 | -191589 |
| 12block | 59 | Okugawa, Shoji (1541) | Draw 1-1 | -11588 |
| 13block | 57 | Imura, Kazuo (1505) | Won 2-1 | +171605 |
| 14block | 46 | Imai, Kimio (1559) | Lost 1-2 | -191586 |
| 15block | 50 | Sakashita, Yuichi (1540) | Won 2-0 | +171603 |
| 16block | 41 | Horie, Takashi (1568) | Lost 0-2 | -181585 |
| top | average opponent: 1544record: 8-6-1 | new rating: 1585 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 70 | Kamakura, Takahiro (1500) | Won 2-0 | +181518 |
| 2sealed | 31 | Kiyohara, Yoichi (1518) | Won 2-1 | +181536 |
| 3sealed | 20 | Ida, Eigo (1536) | Won 2-0 | +181554 |
| 4sealed | 37 | Onoda, Michihisa (1637) | Won 2-0 | +201574 |
| 5sealed | 2 | Arita, Ryuichi (1569) | Won 2-1 | +171591 |
| 6sealed | 4 | Andou, Koutarou (1585) | Won 2-0 | +181609 |
| 7sealed | 3 | Suzuki, Takaaki (1613) | Won 2-0 | +181627 |
| 8draft | 1 | Okada, Kou (1541) | Lost 0-2 | -191608 |
| 9draft | 2 | Fujita, Tsuyoshi (1921) | Lost 1-2 | -131595 |
| 10draft | 11 | Andou, Koutarou (1591) | Lost 1-2 | -181577 |
| 11draft | 19 | Koji, Kazumasa (1623) | Lost 1-2 | -171560 |
| 12draft | 23 | Nakamura, Satoshi (1683) | Lost 0-2 | -161544 |
| 13draft | 25 | Tanaka, Ittoku (1483) | Won 2-1 | +171561 |
| top | average opponent: 1600record: 8-5 | new rating: 1561 | ||