Sumi, Yoshiaki
Current rating: 1473
Record: 4-6
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1272 | Ooyama, Naoki (1500) | Lost 0-2 | -171427 |
| 2sealed | 1303 | Koide, Tomohide (1470) | Won 2-1 | +191446 |
| 3sealed | 1127 | Oosaki, Masakazu (1559) | Lost 0-2 | -161430 |
| 4sealed | 1208 | Mikami, Akihiro (1465) | Won 2-0 | +181448 |
| 5sealed | 1096 | Kawasaki, Kenji (1499) | Won 2-0 | +191467 |
| 6sealed | 1007 | Harashima, Kenichi (1558) | Won 2-1 | +201487 |
| 7sealed | 973 | Ebitani, Keisuke (1693) | Lost 0-2 | -141473 |
| average opponent: 1535record: 4-3 | new rating: 1473 | |||
| Grand Prix Kitakyushu 2013 (M14 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 170 | Higashi, Shohei (1500) | Lost 0-2 | -181482 |
| 2standard | 315 | Urano, Megumi (1436) | Lost 1-2 | -191463 |
| 3standard | 513 | Takahashi, Tomoo (1384) | Lost 1-2 | -191444 |
| average opponent: 1440record: 0-3 | new rating: 1444 | |||