Yamato, Kohei
Current rating: 1434
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1413 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 247 | Suguro, Junki (1500) | Won 2-0 | +191432 |
| 2legacy | 316 | Hirata, Kiyohide (1517) | Won 2-0 | +201452 |
| 3legacy | 215 | Segou, Kenji (1774) | Lost 1-2 | -131439 |
| 4legacy | 159 | Shuhara, Yuuki (1522) | Won 2-1 | +201459 |
| 5legacy | 278 | Ootsuki, Masahiro (1504) | Lost 1-2 | -171442 |
| 6legacy | 281 | Inoue, Toru (1933) | Lost 1-2 | -101432 |
| 7legacy | 321 | Miyata, Hiroyuki (1488) | Lost 0-2 | -171415 |
| 8legacy | 396 | Nagayama, Kanato (1480) | Won 2-1 | +191434 |
| top | average opponent: 1590record: 4-4 | new rating: 1434 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 743 | Ishita, Mio (1428) | Lost 1-2 | -191482 |
| 2standard | 628 | Matsumura, Hideyuki (1475) | Lost 1-2 | -181464 |
| 3standard | 1087 | Shimizu, Shun (1462) | Won 2-0 | +181482 |
| 4standard | 990 | Mizuno, Masahito (1509) | Lost 1-2 | -181464 |
| 5standard | 1061 | Kozuka, Takashi (1500) | Lost 0-2 | -171447 |
| 6standard | 931 | Tsujimura, Akira (1444) | Lost 0-2 | -181429 |
| 7standard | 806 | Kosaka, Yuki (1453) | Lost 0-2 | -181411 |
| 8standard | 688 | Niwa, Toshiharu (1504) | Won 2-0 | +201431 |
| 9standard | 572 | Fujikawa, Daisuke (1426) | Lost 1-2 | -181413 |
| top | average opponent: 1467record: 2-7 | new rating: 1413 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 222 | Amano, Takatoshi (1500) | Won 2-1 | +181518 |
| 2sealed | 174 | Kawachi, Yusuke (1643) | Lost 1-2 | -161502 |
| 3sealed | 267 | Kobayashi, Atsumu (1502) | Lost 1-2 | -181484 |
| 4sealed | 432 | Hagiya, Ginga (1487) | Won 2-0 | +181502 |
| 5sealed | 303 | Hoshino, Hiroyuki (1498) | Won 2-0 | +181520 |
| 6sealed | 261 | Fukihara, Shouta (1453) | Lost 0-2 | -191501 |
| top | average opponent: 1514record: 3-3 | new rating: 1501 | ||