Yamazaki, Kotaro
Current rating: 1554
Record: 19-16-3
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 258 | Sakaki, Yusuke (1501) | Won 2-1 | +181557 |
| 2legacy | 105 | Kitayama, Hodaka (1537) | Won 2-0 | +171574 |
| 3legacy | 98 | Ogasawara, Shou (1427) | Won 2-1 | +161590 |
| 4legacy | 29 | Tsukada, Hiroshi (1464) | Lost 0-2 | -211569 |
| 5legacy | 89 | Igarashi, Kei (1528) | Won 2-0 | +181587 |
| 6legacy | 106 | Kaga, Hiroyuki (1521) | Lost 0-2 | -201567 |
| 7legacy | 208 | Tabei, Hirotomo (1484) | Won 2-1 | +171584 |
| 8legacy | 82 | Maeda, Dai (1514) | Won 2-0 | +171601 |
| 9legacy | 99 | Niwa, Ryuuta (1585) | Lost 1-2 | -191582 |
| 10legacy | 90 | Miura, Katsuya (1552) | Lost 0-2 | -181564 |
| 11legacy | 112 | Nishizawa, Taichi (1630) | Lost 1-2 | -171547 |
| 12legacy | 104 | Chan, Andy 1391 (1521) | Won 2-0 | +171564 |
| 13legacy | 97 | Nakamura, Yuya (1661) | Won 2-0 | +201584 |
| 14legacy | 81 | Lim, Ernest (1966) | Lost 1-2 | -111573 |
| 15legacy | 82 | Miki, Kenta (1540) | Lost 1-2 | -191554 |
| top | average opponent: 1562record: 8-7 | new rating: 1554 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 534 | Nakajima, Hirofumi (1500) | Won 2-1 | +181522 |
| 2legacy | 131 | Komatsu, Isamu (1559) | Won 2-0 | +191541 |
| 3legacy | 395 | Akagi, Takaaki (1459) | Won 2-1 | +161557 |
| 4legacy | 146 | Aikawa, Yuki (1556) | Draw 1-1 | 01557 |
| 5legacy | 155 | Shimamura, Yukihiro (1612) | Lost 0-2 | -171540 |
| 6legacy | 345 | Negishi, Takehiko (1536) | Won 2-0 | +181558 |
| 7legacy | 208 | Shibata, Kenta (1560) | Draw 1-1 | 01558 |
| 8legacy | 366 | Oguri, Kouhei (1554) | Draw 1-1 | 01558 |
| 9legacy | 373 | Okawa, Hiroshi (1515) | Lost 0-2 | -191539 |
| top | average opponent: 1539record: 4-2-3 | new rating: 1539 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 580 | Miyamoto, Hisashi (1500) | Lost 0-2 | -181508 |
| 2legacy | 887 | Suzuki, Yusuke (1476) | Won 2-0 | +171525 |
| 3legacy | 843 | Shishikura, Masahiro (1499) | Lost 0-2 | -181507 |
| 4legacy | 919 | Akase, Yosuke (1395) | Won 2-1 | +161523 |
| 5legacy | 848 | Kumagai, Haruka (1485) | Lost 0-2 | -191504 |
| top | average opponent: 1471record: 2-3 | new rating: 1504 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 108 | Hirosawa, Yuuichirou (1500) | Won 2-0 | +181518 |
| 2extended | 13 | Suzuki, Marin (1519) | Won 2-0 | +181536 |
| 3extended | 35 | Chiba, Akio (1699) | Lost 0-2 | -151521 |
| 4extended | 149 | Uchida, Shinya (1518) | Lost 1-2 | -181503 |
| 5extended | 369 | Urata, Takurou (1561) | Won 2-0 | +191522 |
| 6extended | 164 | Moriya, Daisuke (1636) | Won 2-0 | +201542 |
| 7extended | 179 | Hagiwara, Noriyuki (1614) | Lost 1-2 | -171525 |
| 8extended | 103 | Shinozaki, Toshiyuki (1518) | Won 2-1 | +181543 |
| 9extended | 100 | Shiroza, Shinichiro (1608) | Lost 1-2 | -171526 |
| top | average opponent: 1575record: 5-4 | new rating: 1526 | ||