Yamazaki, Takefumi
Current rating: 1611
Record: 15-12
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1422 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 209 | Akashi, Takuma (1523) | Won 2-0 | +201442 |
| 3sealed | 145 | Maki, Kazunori (1679) | Won 2-0 | +221464 |
| 4sealed | 174 | Kasahara, Yusuke (1539) | Won 2-0 | +201484 |
| 5sealed | 38 | Uemura, Akira (1562) | Won 2-0 | +191503 |
| 6sealed | 21 | Yokota, Takuma (1517) | Won 2-0 | +181521 |
| 7sealed | 17 | Nishimura, Takashi 6132 (1639) | Won 2-0 | +201541 |
| 8sealed | 13 | Fukudome, Yuu (1777) | Won 2-1 | +231564 |
| 9sealed | 4 | Wang, Alfred (1657) | Lost 1-2 | -171547 |
| 10draft | 141 | Moriyama, Masahide (1853) | Won 2-0 | +241571 |
| 11draft | 54 | Saijo, Hayato (1598) | Won 2-1 | +181589 |
| 12draft | 2 | Kawasaki, Keita (1859) | Lost 0-2 | -131576 |
| 13draft | 56 | Yamamoto, Ryoichi (1745) | Won 2-0 | +211597 |
| 14draft | 144 | Li, Tianjian (1834) | Won 2-0 | +221619 |
| 15draft | 136 | Soh, Joe (2191) | Lost 0-2 | -81611 |
| top | average opponent: 1712record: 11-3 | new rating: 1611 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1451 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 367 | Tahara, Hideaki (1442) | Won 2-1 | +181469 |
| 3modern | 529 | Miwa, Ryou (1707) | Lost 1-2 | -141455 |
| 4modern | 463 | Mishima, Wataru (1652) | Lost 0-2 | -141441 |
| 5modern | 850 | Araki, Youhei (1424) | Lost 1-2 | -191422 |
| top | average opponent: 1556record: 1-3 | new rating: 1422 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 109 | Tashima, Kenji (1500) | Lost 1-2 | -181464 |
| 2standard | 1149 | Yokota, Takuma (1464) | Won 2-0 | +181482 |
| 3standard | 1251 | Yamada, Ryo (1500) | Won 2-0 | +181500 |
| 4standard | 792 | James, Nicholas (1578) | Lost 1-2 | -161484 |
| 5standard | 1158 | Watabe, Jun (1499) | Lost 0-2 | -181466 |
| 6standard | 1122 | Katsubayashi, Nobuhisa (1627) | Lost 1-2 | -151451 |
| top | average opponent: 1528record: 2-4 | new rating: 1451 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 977 | Takagi, Kengo (1606) | Won 2-0 | +201520 |
| 2sealed | 1206 | Ishii, Yuki (1429) | Lost 0-2 | -201500 |
| 3sealed | 1151 | Ookura, Haruka (1465) | Lost 0-2 | -181482 |
| top | average opponent: 1500record: 1-2 | new rating: 1482 | ||