Kubota, Keiichi
Current rating: 1519
| Grand Prix Yokohama 2019 (modern) | starting rating: 1542 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 348 | Kawai, Ryo (1317) | Won 2-1 | +141556 |
| 2modern | 163 | Horie, Yoshiaki (1355) | Lost 1-2 | -221534 |
| 3modern | 779 | Tomioka, Teppei (1500) | Won 2-0 | +181552 |
| 4modern | 657 | Akaike, Yo (1697) | Lost 1-2 | -161536 |
| 5modern | 580 | Iso, Toshiharu (1535) | Won 2-0 | +181554 |
| 6modern | 400 | Miyabe, Kouichi (1667) | Lost 0-2 | -161538 |
| 7modern | 690 | Makino, Takahito (1441) | Lost 0-2 | -191519 |
| top | average opponent: 1502record: 3-4 | new rating: 1519 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 241 | Sue, Ryoichi (1547) | Draw 1-1 | +11483 |
| 2legacy | 340 | Toyoda, Yorito (1501) | Won 2-1 | +191502 |
| 3legacy | 296 | Sakamoto, Kensuke (1463) | Won 2-0 | +171519 |
| 4legacy | 148 | Saito, Fumiya (1542) | Won 2-1 | +181537 |
| 5legacy | 73 | Jiang, Chenghan (1589) | Won 2-0 | +191556 |
| 6legacy | 41 | Yamashita, Yoshiki (1463) | Lost 0-2 | -201536 |
| 7legacy | 116 | Miwa, Ryou (1825) | Won 2-1 | +241560 |
| 8legacy | 68 | Dame, Derek (1577) | Lost 1-2 | -181542 |
| top | average opponent: 1563record: 5-2-1 | new rating: 1542 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 89 | Yoshida, Shunsuke (1500) | Lost 0-2 | -181482 |
| top | record: 0-1 | new rating: 1482 | ||