Kumazawa, Yuki
Current rating: 1419
Record: 5-10
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 419 | Sugimoto, Takashi (1491) | Lost 1-2 | -171429 |
| 2sealed | 571 | Ito, Fumiya (1482) | Won 2-1 | +191448 |
| 3sealed | 880 | Akazaki, Daigo (1496) | Lost 1-2 | -171431 |
| 4sealed | 1045 | Shibata, Masato (1506) | Won 2-1 | +191450 |
| 5sealed | 594 | Kusunoki, Yuki (1606) | Lost 1-2 | -151435 |
| 6sealed | 851 | Ogyu, Yoshiyuki (1322) | Lost 1-2 | -201415 |
| 7sealed | 891 | Choi, Jaekyoo (1544) | Won 2-1 | +201435 |
| 8sealed | 707 | Matsushita, Masayoshi (1550) | Lost 0-2 | -161419 |
| average opponent: 1500record: 3-5 | new rating: 1419 | |||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 917 | Arakaki, Gen (1500) | Won 2-0 | +181518 |
| 2standard | 9 | Hotta, Kei (1474) | Lost 0-2 | -191499 |
| 3standard | 1170 | Shiraishi, Kousuke (1462) | Lost 0-2 | -181481 |
| 4standard | 1256 | Yasunaka, Masaya (1450) | Won 2-1 | +171498 |
| 5standard | 1075 | Shimamura, Kazushige (1463) | Lost 1-2 | -191479 |
| 6standard | 1137 | Kajiwara, Shou (1594) | Lost 0-2 | -161463 |
| 7standard | 1183 | Ishii, Shinji (1496) | Lost 0-2 | -171446 |
| average opponent: 1491record: 2-5 | new rating: 1446 | |||