Kubo, Katsutoshi
Current rating: 1430
Record: 2-6-1
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 713 | Isaka, Yuichi (1500) | Draw 1-1 | +11463 |
| 2standard | 753 | Irizuki, Syouta (1500) | Lost 1-2 | -171446 |
| 3standard | 1424 | Mitsuhashi, Ryota (1464) | Lost 0-2 | -181428 |
| 4standard | 1526 | Tsuzuki, Makoto (1520) | Won 2-0 | +201448 |
| 5standard | 1286 | Hukuoka, Yutaka (1477) | Lost 0-2 | -181430 |
| average opponent: 1492record: 1-3-1 | new rating: 1430 | |||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 356 | Kaneiwa, Shunta (1500) | Won 2-0 | +181518 |
| 2sealed | 229 | Nakamichi, Yuko (1503) | Lost 1-2 | -181500 |
| 3sealed | 372 | Yamaguchi, Naohiro (1421) | Lost 1-2 | -201480 |
| 4sealed | 496 | Sugo, Kenichi (1480) | Lost 0-2 | -181462 |
| average opponent: 1476record: 1-3 | new rating: 1462 | |||