Yamasaki, Toshihiro
Current rating: 1377
Record: 9-18-1
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1382 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 137 | Nii, Masanobu (1483) | Lost 0-0 | -161366 |
| 2sealed | 180 | Ooba, Tomohiro (1483) | Draw 1-1 | +21368 |
| 3sealed | 232 | Yamada, Chiaki (1559) | Won 2-1 | +221390 |
| 4sealed | 196 | Tanimoto, Masashi (1502) | Won 2-0 | +201410 |
| 5sealed | 139 | Sandroni, Riccardo (1519) | Lost 1-2 | -161394 |
| 6sealed | 44 | Iwaki, Hiroyuki (1466) | Lost 0-2 | -171377 |
| top | average opponent: 1502record: 2-3-1 | new rating: 1377 | ||
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1418 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 157 | Tanikawa, Itaru (1358) | Lost 1-2 | -191399 |
| 2standard | 266 | Nakamura, Hiroya (1470) | Lost 0-2 | -171382 |
| top | average opponent: 1414record: 0-2 | new rating: 1382 | ||
| Grand Prix Okayama 2004 (extended) | starting rating: 1426 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 16 | Aki, Yasutoshi (1625) | Won 2-1 | +221448 |
| 2extended | 22 | Sumitomo, Hiroyuki (1505) | Won 2-1 | +191467 |
| 3extended | 5 | Tanaka, Hisaya (1722) | Lost 1-2 | -141453 |
| 4extended | 86 | Sawada, Youhei (1518) | Lost 1-2 | -161437 |
| 5extended | 127 | Niwa, Takeshi (1418) | Lost 0-2 | -191418 |
| top | average opponent: 1557record: 2-3 | new rating: 1418 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 14 | Sugiyama, Kouichi (1528) | Lost 1-2 | -171462 |
| 2extended | 117 | Itagaki, Yota (1506) | Lost 0-2 | -171445 |
| 3extended | 167 | Kusumoto, Masahiro (1395) | Lost 0-2 | -191426 |
| top | average opponent: 1476record: 0-3 | new rating: 1426 | ||
| Grand Prix Sendai 2001 (extended) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 74 | Okada, Kou (1616) | Won 2-0 | +211467 |
| 3extended | 20 | Suematsu, Masataka (1470) | Won 2-1 | +181485 |
| 4extended | 33 | Higaki, Takao (1814) | Lost 0-2 | -121473 |
| 5extended | 54 | Hayashi, Chikara (1525) | Lost 1-2 | -171456 |
| 6extended | 111 | Goto, Takashi (1550) | Won 2-1 | +201476 |
| 7extended | 55 | Sato, Shinichi (1624) | Lost 1-2 | -161460 |
| 8extended | 79 | Uchiyama, Akito (1522) | Won 2-0 | +191479 |
| top | average opponent: 1589record: 4-3 | new rating: 1479 | ||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 194 | Onishi, Manabu (1500) | Won 2-0 | +181518 |
| 2extended | 56 | Abe, Natsuki (1519) | Lost 0-2 | -181500 |
| 3extended | 139 | Okamoto, Yoshihiko (1500) | Lost 0-2 | -181482 |
| 4extended | 265 | Miyazaki, Kensuke (1482) | Lost 0-2 | -181464 |
| 5extended | 275 | Kojima, Kazuyoshi (1464) | Lost 0-2 | -181446 |
| top | average opponent: 1493record: 1-4 | new rating: 1446 | ||