Manaka, Akihiro
Current rating: 1458
Record: 11-15
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 178 | Matuoka, Akira (1407) | Lost 1-2 | -201469 |
| 2sealed | 740 | Hirose, Yuuki (1878) | Lost 1-2 | -111458 |
| top | average opponent: 1642record: 0-2 | new rating: 1458 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1457 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 477 | Niinuma, Hiroki (1632) | Won 2-0 | +221479 |
| 2standard | 258 | Yamakawa, Takahiro (1517) | Won 2-0 | +181497 |
| 3standard | 101 | Kawakami, Hiroshi (1655) | Lost 1-2 | -151482 |
| 4standard | 400 | Tsuchihashi, Takuya (1714) | Lost 0-2 | -141468 |
| 5standard | 693 | Nakano, Satoshi (1439) | Won 2-0 | +181486 |
| 6standard | 774 | Matsushita, Takahiro (1613) | Won 2-1 | +201506 |
| 7standard | 592 | Hayami, Toshihiro (1538) | Lost 1-2 | -171489 |
| top | average opponent: 1587record: 4-3 | new rating: 1489 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 226 | Ryusuke, Kobayashi (1556) | Lost 0-2 | -171446 |
| 2standard | 840 | Sakai, Arata (1453) | Won 2-0 | +191465 |
| 3standard | 1134 | Kawashima, Hajime (1743) | Lost 0-2 | -131452 |
| 4standard | 1437 | Kawamura, Kazushi (1760) | Won 2-1 | +231475 |
| 5standard | 1113 | Nakao, Shunji (1500) | Lost 0-2 | -181457 |
| top | average opponent: 1602record: 2-3 | new rating: 1457 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1459 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 125 | Hsin, Michael (1521) | Lost 0-2 | -161443 |
| 2sealed | 454 | Takami, Yuta5652 (1480) | Won 2-1 | +181461 |
| 3sealed | 383 | Sakagami, Tsuyoshi (1503) | Won 2-1 | +191480 |
| 4sealed | 343 | Takeuchi, Yuu (1520) | Lost 1-2 | -171463 |
| top | average opponent: 1506record: 2-2 | new rating: 1463 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 382 | Tagomori, Shou (1505) | Lost 0-2 | -181482 |
| 2extended | 454 | Fukumoto, Hiroaki (1482) | Lost 0-2 | -181464 |
| 3extended | 449 | Takahashi, Ryou (1335) | Lost 1-2 | -201444 |
| 4extended | 483 | Hasegawa, Tsuguto (1415) | Won 2-0 | +171461 |
| 5extended | 431 | Matsui, Shintaro (1459) | Won 2-0 | +181479 |
| 6extended | 333 | Sakamoto, Naoki (1378) | Lost 0-2 | -201459 |
| 7extended | 273 | Ohshiba, Atsushi (1463) | Lost 1-2 | -181441 |
| 8extended | 97 | Shimizu, Ryo (1446) | Won 2-1 | +181459 |
| top | average opponent: 1435record: 3-5 | new rating: 1459 | ||