Tamai, Katsuyoshi
Current rating: 1533
Record: 34-36-2
| Grand Prix Kobe 2012 (DKA limited) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 12 | Nishi, Yohei (1500) | Won 2-0 | +171552 |
| 2sealed | 107 | Koyama, Masashi (1519) | Won 2-0 | +181570 |
| 3sealed | 175 | Sano, Kunihide (1536) | Lost 1-2 | -191551 |
| 4sealed | 293 | Han, Chin Yao (1466) | Won 2-0 | +171568 |
| 5sealed | 231 | Kentarou K., (1605) | Lost 0-2 | -181550 |
| 6sealed | 210 | Yamazaki, Daisuke (1479) | Lost 1-2 | -191531 |
| 7sealed | 304 | Sano, Futoshi (1478) | Won 2-0 | +171548 |
| 8sealed | 202 | Kawakami, Hiroshi (1742) | Lost 0-2 | -151533 |
| 9sealed | 199 | Nakaoka, Koshiro (1497) | Draw 0-0 | 01533 |
| top | average opponent: 1536record: 4-4-1 | new rating: 1533 | ||
| Grand Prix Kitakyushu 2009 (ZEN limited) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 118 | Shirakura, Tsuyoshi (1553) | Won 2-1 | +181544 |
| 3sealed | 8 | Sasaki, Takashi (1585) | Won 2-1 | +191563 |
| 4sealed | 48 | Sawade, Makoto (1516) | Won 2-0 | +171580 |
| 5sealed | 31 | Nakano, Yoshitaka (1906) | Lost 1-2 | -121568 |
| 6sealed | 23 | Yukuhiro, Ken (1681) | Lost 0-2 | -161552 |
| 7sealed | 57 | Uchida, Momotarou (1604) | Lost 1-2 | -171535 |
| top | average opponent: 1641record: 3-3 | new rating: 1535 | ||
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 6 | Ishida, Masahiro (1507) | Won 2-0 | +171556 |
| 5sealed | 26 | Ito, Atsushi (1717) | Lost 0-2 | -151541 |
| 6sealed | 187 | Nagao, Keisuke (1519) | Lost 1-2 | -181523 |
| 7sealed | 157 | Hayashi, Hiroki (1707) | Draw 1-1 | +31526 |
| top | average opponent: 1613record: 1-2-1 | new rating: 1526 | ||
| Grand Prix Kobe 2008 (Lorwyn block) | starting rating: 1523 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 41 | Kozakai, Yukio (1511) | Won 2-1 | +181541 |
| 2block | 55 | Saiki, Keisuke (1571) | Won 2-0 | +191560 |
| 3block | 58 | Utsumi, Hironobu (1501) | Won 2-1 | +171577 |
| 4block | 40 | Mizutani, Naoto (1533) | Lost 1-2 | -191558 |
| 5block | 117 | Kim, In (1533) | Won 2-1 | +171575 |
| 6block | 73 | Yamaguchi, Koutarou (1560) | Lost 1-2 | -181557 |
| 7block | 76 | Sakai, Kouhei (1533) | Lost 0-2 | -181539 |
| top | average opponent: 1535record: 4-3 | new rating: 1539 | ||
| Grand Prix Kyoto 2007 (PLC standard) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 137 | Nakajima, Takumi (1517) | Lost 1-2 | -171481 |
| 2standard | 253 | Mori, Takashi(Tokyo) (1483) | Won 2-1 | +181499 |
| 3standard | 269 | Matsuo, Yoshiyuki (1499) | Won 2-1 | +181517 |
| 4standard | 204 | Yamamoto, Kazuhiro (1516) | Won 2-1 | +181535 |
| 5standard | 149 | Masuno, Ryosuke (1671) | Won 2-1 | +201555 |
| 6standard | 81 | Takeshita, Toru (1663) | Lost 1-2 | -161539 |
| 7standard | 86 | Ueda, Katsuya (1667) | Lost 0-2 | -161523 |
| top | average opponent: 1574record: 4-3 | new rating: 1523 | ||
| Grand Prix Hiroshima 2006 (CSP limited) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 14 | Maehata, Yasuhito (1692) | Won 2-0 | +211525 |
| 3sealed | 26 | Tsuta, Naoto (1535) | Lost 1-2 | -181507 |
| 4sealed | 78 | Kawate, Makoto (1500) | Won 2-0 | +181525 |
| 5sealed | 42 | Mitamura, Kazuya (1650) | Lost 0-2 | -161509 |
| 6sealed | 93 | Morita, Masahiko (1899) | Lost 1-2 | -111498 |
| top | average opponent: 1655record: 2-3 | new rating: 1498 | ||
| Grand Prix Matsuyama 2005 (BOK limited) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 48 | Kobori, Tetsuhiro (1433) | Lost 0-2 | -181449 |
| 3sealed | 80 | Hitomi, Masaaki (1469) | Won 2-0 | +181467 |
| 4sealed | 111 | Ishii, Hayato (1589) | Won 2-0 | +201487 |
| 5sealed | 60 | Bandou, Junichirou (1726) | Won 2-1 | +231510 |
| 6sealed | 44 | Ibamoto, Masami (1770) | Lost 1-2 | -141496 |
| 7sealed | 84 | Nishiwaki, Kazuhisa (1656) | Won 2-0 | +211517 |
| 8sealed | 28 | Matousek, Pavel (1775) | Lost 0-2 | -131504 |
| top | average opponent: 1631record: 4-3 | new rating: 1504 | ||
| Grand Prix Shizuoka 2003 (MRD limited) | starting rating: 1477 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 118 | Abueg, John (1499) | Won 2-0 | +181495 |
| 3sealed | 37 | Nakano, Yoshitaka (1692) | Lost 1-2 | -141481 |
| 4sealed | 139 | Yamamoto, Akimasa (1633) | Won 2-1 | +201501 |
| 5sealed | 75 | Seki, Kazuhiko (1567) | Lost 0-2 | -161485 |
| 6sealed | 109 | Takayanagi, Michio (1522) | Lost 1-2 | -181467 |
| top | average opponent: 1582record: 2-3 | new rating: 1467 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 106 | Hiraga, Mikio (1517) | Lost 1-2 | -181469 |
| 3block | 177 | Takakuwa, Akihiro (1730) | Lost 1-2 | -131456 |
| 4block | 330 | Kawaguchi, Masashi (1445) | Won 2-1 | +181474 |
| 5block | 215 | Wu, Kasin (1483) | Won 2-1 | +181492 |
| 6block | 204 | Doiuchi, Yasuhiro (1600) | Won 2-1 | +201512 |
| 7block | 113 | Katsumata, Yoshihisa (1537) | Lost 0-2 | -181494 |
| 8block | 140 | Iwamoto, Gohki (1515) | Lost 0-2 | -171477 |
| top | average opponent: 1547record: 3-4 | new rating: 1477 | ||
| Grand Prix Kyoto 2003 (LGN limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 157 | Ooshiro, Hideto (1570) | Lost 1-2 | -171464 |
| 2sealed | 240 | Arai, Tomoya (1482) | Won 2-0 | +181482 |
| 3sealed | 125 | Nakamura, Masaya (1467) | Won 2-0 | +181500 |
| 4sealed | 89 | Hisaki, Yuu (1557) | Won 2-1 | +191519 |
| 5sealed | 71 | Mihara, Makihito (1631) | Lost 0-2 | -161503 |
| 6sealed | 87 | Ishihara, Takashi (1540) | Lost 0-2 | -171486 |
| 7sealed | 158 | Takagi, Takeshi (1570) | Won 2-0 | +191505 |
| 8sealed | 24 | Inagaki, Hiromitsu (1470) | Lost 0-2 | -181487 |
| top | average opponent: 1536record: 4-4 | new rating: 1487 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 17 | Takahashi, Yuuki (1500) | Lost 0-2 | -181482 |
| 3extended | 126 | Suzuki, Gou (1488) | Lost 0-2 | -181464 |
| 4extended | 174 | Igarashi, Ryouto (1484) | Won 2-1 | +181482 |
| 5extended | 131 | Furukawa, Tadataka (1425) | Lost 1-2 | -191463 |
| 6extended | 140 | Katayama, Takahiro (1470) | Lost 0-2 | -171446 |
| 7extended | 125 | Maruyama, Kentarou (1466) | Won 2-0 | +181464 |
| 8extended | 94 | Kanazawa, Naoko (1387) | Won 2-1 | +171481 |
| top | average opponent: 1460record: 3-4 | new rating: 1481 | ||