Tamura, Katsuhiko
Current rating: 1539
Record: 16-14-4
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1560 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 143 | Yanada, Kenji (1486) | Lost 1-2 | -191541 |
| 3sealed | 206 | Kishida, Hirokazu (1463) | Lost 1-2 | -201521 |
| 4sealed | 240 | Nakashima, Toshihiko (1454) | Won 2-1 | +171538 |
| 5sealed | 203 | Ishikka, Takehiro (1616) | Won 2-0 | +201558 |
| 6sealed | 104 | Katou, Yoshitugu (1517) | Lost 0-2 | -191539 |
| 7sealed | 127 | Sato, Mitsunori (1542) | Lost 1-2 | -181521 |
| 8sealed | 56 | Kanazawa, Ayanobu (1543) | Won 2-1 | +181539 |
| top | average opponent: 1517record: 3-4 | new rating: 1539 | ||
| Grand Prix Sendai 2004 (DST limited) | starting rating: 1577 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 4 | Katayose, Shingo (1555) | Won 2-0 | +181595 |
| 3sealed | 44 | Anazawa, Yoshikazu (1703) | Lost 0-2 | -161579 |
| 4sealed | 118 | Machida, Takahiro (1548) | Lost 1-2 | -191560 |
| top | average opponent: 1602record: 1-2 | new rating: 1560 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1538 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 134 | Shindou, Takehiro (1464) | Won 2-1 | +161554 |
| 4block | 50 | Morimoto, Naoto (1553) | Won 2-0 | +181572 |
| 5block | 9 | Usami, Taro (1641) | Won 2-0 | +191591 |
| 6block | 18 | Momose, Kazuyuki (1723) | Won 2-1 | +211612 |
| 7block | 4 | Lee, Jun-young (1591) | Lost 0-2 | -191593 |
| 8block | 9 | Kato, Kazuki (1688) | Lost 1-2 | -161577 |
| top | average opponent: 1610record: 4-2 | new rating: 1577 | ||
| Grand Prix Sapporo 2002 (Odyssey block) | starting rating: 1537 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 83 | Sato, Yukihiro (1505) | Lost 0-2 | -181519 |
| 3block | 175 | Tano, Fumiaki (1501) | Won 2-0 | +171536 |
| 4block | 86 | Keduka, Tomohiko (1501) | Won 2-0 | +181554 |
| 5block | 57 | Kanetaka, Yujiro (1534) | Lost 0-2 | -191535 |
| 6block | 123 | Ogami, Kenji (1626) | Won 2-1 | +201555 |
| 7block | 49 | Igarashi, Takayuki (1583) | Lost 1-2 | -171538 |
| top | average opponent: 1542record: 3-3 | new rating: 1538 | ||
| Grand Prix Sendai 2001 (extended) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 94 | Wakuri, Akira (1602) | Draw 1-1 | +21520 |
| 3extended | 88 | Kimoto, Kenji (1518) | Draw 1-1 | 01520 |
| 4extended | 133 | Honma, Satoshi (1533) | Won 2-0 | +181538 |
| 5extended | 96 | Maruyama, Takaaki (1518) | Won 2-0 | +171555 |
| 6extended | 60 | Kaplan, Lain (1553) | Lost 1-2 | -181537 |
| top | average opponent: 1545record: 2-1-2 | new rating: 1537 | ||
| Grand Prix Sapporo 2000 (PCY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 29 | Takenaka, Shunsuke (1500) | Lost 0-1 | -181482 |
| 2sealed | 86 | Matsukawa, Shin (1482) | Won 2-0 | +181500 |
| 3sealed | 73 | Kamei, Kazuhiko (1502) | Lost 1-2 | -181482 |
| 4sealed | 103 | Anzai, Yoshio (1482) | Won 2-1 | +181500 |
| 5sealed | 68 | Nadachi, Shinji (1500) | Draw 1-1 | 01500 |
| 6sealed | 83 | Takeda, Yoshihide (1500) | Won 2-0 | +181518 |
| 7sealed | 63 | Isobe, Masato (1517) | Draw 1-1 | 01518 |
| top | average opponent: 1498record: 3-2-2 | new rating: 1518 | ||