Kubota, Koki
Current rating: 1492
Record: 16-18
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 413 | Asahara, Akira (1990) | Lost 0-2 | -91437 |
| 2standard | 417 | Kuno, Michihiro (1482) | Won 2-0 | +181455 |
| 3standard | 555 | Kamada, Yuuki (1541) | Won 2-1 | +201475 |
| 4standard | 421 | Naito, Yoshiyuki (1462) | Won 2-0 | +181493 |
| 5standard | 341 | Watabe, Kouji (1496) | Won 2-0 | +181511 |
| 6standard | 187 | Tazawa, Takatoshi (1409) | Lost 1-2 | -201491 |
| 7standard | 187 | Takayanagi, Kenichi (1507) | Won 2-1 | +181509 |
| 8standard | 172 | Akamine, Yuta (1574) | Lost 1-2 | -171492 |
| top | average opponent: 1558record: 5-3 | new rating: 1492 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1401 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 312 | Shinohara, Daigo (1500) | Won 2-0 | +201421 |
| 2sealed | 161 | Takayama, Kiichiro (1481) | Won 2-1 | +191440 |
| 3sealed | 535 | Ido, Daiki (1397) | Lost 1-2 | -191421 |
| 4sealed | 604 | Kukino, Yudai (1515) | Lost 0-2 | -161405 |
| 5sealed | 562 | Arashiyama, Kazutoshi (1481) | Won 2-1 | +191424 |
| 6sealed | 557 | Mizuno, Akimitsu (1263) | Won 2-1 | +151439 |
| 7sealed | 435 | Nitta, Yuki (1618) | Won 2-1 | +221461 |
| 8sealed | 237 | Ikeda, Tsuyoshi (1628) | Lost 1-2 | -151446 |
| top | average opponent: 1485record: 5-3 | new rating: 1446 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 627 | Nakamura, Akiteru (1463) | Lost 0-2 | -171416 |
| 2standard | 789 | Mizuno, Masahito (1522) | Won 2-1 | +201436 |
| 3standard | 952 | Sugaya, Yuta (1421) | Lost 0-2 | -191417 |
| 4standard | 1013 | Kazumasa, Akihiro (1359) | Won 2-1 | +171434 |
| 5standard | 802 | Hara, Katsuaki (1537) | Lost 0-2 | -161418 |
| 6standard | 830 | Kamiyama, Daiki (1469) | Lost 0-2 | -171401 |
| top | average opponent: 1462record: 2-4 | new rating: 1401 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 540 | Seiwada, Koyo (1462) | Lost 0-2 | -181444 |
| 2modern | 825 | Taki, Mayumi (1490) | Lost 1-2 | -171427 |
| 3modern | 1181 | Mizuguchi, Chihiro (1462) | Lost 0-2 | -181409 |
| 4modern | 1261 | Kato, Tomonori (1359) | Won 2-0 | +171426 |
| 5modern | 1147 | Kawamura, Takayuki (1532) | Won 2-1 | +201446 |
| 6modern | 1060 | Tamai, Yuno (1571) | Won 2-0 | +201466 |
| 7modern | 651 | Oka, Yosuke (1634) | Lost 1-2 | -151451 |
| 8modern | 864 | Kawawaki, Masataka (1433) | Lost 0-2 | -181433 |
| top | average opponent: 1493record: 3-5 | new rating: 1433 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 873 | Lessmann, Richard (1447) | Won 2-0 | +171517 |
| 2modern | 923 | Toneri, Tatsuki (1497) | Lost 1-2 | -181499 |
| 3modern | 990 | Yoshino, Satoshi (1444) | Lost 0-2 | -191480 |
| 4modern | 1169 | Asahi, Yuichi (1481) | Lost 0-2 | -181462 |
| top | average opponent: 1467record: 1-3 | new rating: 1462 | ||