Koshimoto, Kazuki
Current rating: 1385
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1385 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 445 | Okamura, Marei (1484) | Lost 1-2 | -171368 |
| 2sealed | 730 | Kurikage, Kazuya (1382) | Lost 0-2 | -171351 |
| 3sealed | 1094 | Wada, Yuusaku (1451) | Lost 0-2 | -171334 |
| 4sealed | 1094 | Nakazato, Yuuma (1356) | Won 2-0 | +191353 |
| 5sealed | 1030 | Kawai, Yoshihiro (1453) | Won 2-0 | +201373 |
| 6sealed | 845 | Uesugi, Fumiya (1529) | Won 2-1 | +201393 |
| 7sealed | 627 | Shiraishi, Masaharu (1709) | Won 2-1 | +241417 |
| 8sealed | 635 | Takaki, Kazunari (1532) | Lost 1-2 | -161401 |
| 9sealed | 585 | Takano, Hayato (1498) | Lost 0-2 | -161385 |
| top | average opponent: 1488record: 4-5 | new rating: 1385 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1394 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 308 | Endo, Takuya7968 (1446) | Lost 0-2 | -171377 |
| 2sealed | 828 | Sumitomo, Yusuke (1514) | Lost 0-2 | -151362 |
| 3sealed | 1180 | Katagishi, Jun'Ichi (1506) | Won 2-0 | +201382 |
| 4sealed | 1161 | Goto, Keisuke (1481) | Won 2-0 | +201402 |
| 5sealed | 650 | Satou, Naoyuki (1416) | Lost 0-2 | -171385 |
| top | average opponent: 1473record: 2-3 | new rating: 1385 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 375 | Morita, Kouki (1579) | Lost 0-2 | -171483 |
| 2sealed | 390 | Fukuda, Shouhei (1481) | Lost 0-2 | -181465 |
| 3sealed | 504 | Wada, Tomoya (1498) | Lost 0-2 | -171448 |
| 4sealed | 480 | Matsui, Yasuharu (1442) | Won 2-1 | +181466 |
| 5sealed | 413 | Nakamura, Kousuke (1491) | Lost 1-2 | -181448 |
| 6sealed | 359 | Yamagishi, Hideaki (1446) | Lost 0-2 | -181430 |
| 7sealed | 304 | Shiraishi, Ginga (1442) | Lost 0-2 | -171413 |
| 8sealed | 253 | Ibayashi, Kousuke (1409) | Lost 0-2 | -191394 |
| top | average opponent: 1474record: 1-7 | new rating: 1394 | ||