Yamahara, Toshihisa
Current rating: 1582
Record: 23-18
| Grand Prix Shizuoka 2003 (MRD limited) | starting rating: 1607 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 43 | Yamada, Keiichi (1417) | Won 2-0 | +141621 |
| 2sealed | 134 | Sonoda, Naohiro (1543) | Lost 1-2 | -191602 |
| 3sealed | 241 | Kawabata, Yukito (1500) | Lost 0-2 | -201582 |
| top | average opponent: 1486record: 1-2 | new rating: 1582 | ||
| Grand Prix Kyoto 2003 (LGN limited) | starting rating: 1612 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 112 | Imai, Kimio (1588) | Won 2-0 | +171629 |
| 3sealed | 60 | Iwatsuki, Yoshifumi (1535) | Won 2-0 | +171646 |
| 4sealed | 14 | Sugiki, Takafumi (1612) | Lost 0-2 | -191627 |
| 5sealed | 54 | Nonishi, Keiichiro (1615) | Lost 0-2 | -181609 |
| 6sealed | 143 | Takagi, Takeshi (1588) | Won 2-1 | +171626 |
| 7sealed | 62 | Koguchi, Yasuaki (1533) | Lost 0-2 | -191607 |
| top | average opponent: 1578record: 3-3 | new rating: 1607 | ||
| Grand Prix Shizuoka 2001 (ODY limited) | starting rating: 1544 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 76 | Iwazaki, Yuji (1500) | Won 2-0 | +171561 |
| 2sealed | 122 | Nagatani, Hiromi (1518) | Won 2-0 | +181579 |
| 3sealed | 103 | Kubouchi, Naoki (1577) | Lost 0-2 | -181561 |
| 4sealed | 110 | Abe, Kazufumi (1513) | Won 2-0 | +171578 |
| 5sealed | 62 | Tsukamoto, Toshiki (1627) | Lost 1-2 | -171561 |
| 6sealed | 104 | Minamide, Shingo (1518) | Won 2-0 | +171578 |
| 7sealed | 61 | Sueyoshi, Eisaku (1506) | Won 2-0 | +171595 |
| 8sealed | 49 | Kubota, Toru (1555) | Won 2-1 | +171612 |
| top | average opponent: 1539record: 6-2 | new rating: 1612 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 4block | 129 | Nishida, Koji (1553) | Won 2-0 | +191541 |
| 5block | 55 | Nozaki, Taiki (1553) | Won 2-1 | +181559 |
| 6block | 21 | Kurihara, Tomo (1571) | Lost 0-2 | -181541 |
| 7block | 41 | Kurasawa, Kanto (1556) | Lost 0-2 | -181523 |
| 8block | 137 | Chao, Peter (1564) | Won 2-0 | +191542 |
| 9block | 50 | Nishino, Kenta (1557) | Won 2-1 | +181560 |
| 10block | 59 | Okazaki, Yuya (1556) | Won 2-1 | +181578 |
| 11block | 27 | Fujimoto, Tomoya (1528) | Lost 0-2 | -191559 |
| 12block | 30 | Nakamura, Yusuke (1557) | Lost 1-2 | -181541 |
| 13block | 43 | Eda, Takeshi (1575) | Won 2-0 | +191560 |
| 14block | 37 | Yokoyama, Tadashi (1692) | Lost 0-2 | -161544 |
| top | average opponent: 1569record: 6-5 | new rating: 1544 | ||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 64 | Sagawa, Makoto (1518) | Won 2-0 | +181518 |
| 3extended | 94 | Haneki, Daisuke (1518) | Won 2-1 | +181536 |
| 4extended | 23 | Nakamura, Satoshi (1741) | Lost 1-2 | -141522 |
| 5extended | 61 | Sumi, Kazuhiko (1528) | Won 2-1 | +181540 |
| 6extended | 82 | Hasegawa, Yasunori (1519) | Won 2-1 | +181558 |
| 7extended | 29 | Hojo, Naomasa (1536) | Won 2-0 | +171575 |
| 8extended | 17 | Tsukamoto, Toshiki (1642) | Lost 0-2 | -161559 |
| 9extended | 32 | Kagami, Gen (1538) | Lost 0-2 | -191540 |
| 10extended | 30 | Takeda, Takamichi (1507) | Lost 0-2 | -181522 |
| 11extended | 30 | Iino, Ryuji (1520) | Lost 0-2 | -181504 |
| 12extended | 30 | Yanagawa, Tetsuji (1534) | Won 2-1 | +181522 |
| 13extended | 29 | Okuda, Masateru (1517) | Won 2-0 | +181540 |
| 14extended | 27 | Nishio, Yoshiaki (1536) | Lost 0-2 | -181522 |
| top | average opponent: 1550record: 7-6 | new rating: 1522 | ||