Kobori, Masaaki
Current rating: 1461
Record: 12-15
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1456 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1185 | Tsutiya, Yukihiro (1542) | Won 2-1 | +201476 |
| 2sealed | 962 | Nakayama, Yuhei (1553) | Won 2-0 | +191495 |
| 3sealed | 1027 | Adachi, Ryosuke (1562) | Lost 1-2 | -161479 |
| 4sealed | 976 | Naraya, Takaaki (1519) | Lost 0-2 | -181461 |
| 5sealed | 1086 | Imazawa, Junpei (1504) | Won 2-0 | +191480 |
| 6sealed | 1088 | Ishii, Yuki (1436) | Lost 0-2 | -191461 |
| top | average opponent: 1519record: 3-3 | new rating: 1461 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1491 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 962 | Ando, Koyo (1606) | Lost 1-2 | -161475 |
| 2sealed | 983 | Takahashi, Ryo (1433) | Lost 0-2 | -191456 |
| top | average opponent: 1520record: 0-2 | new rating: 1456 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1471 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 104 | Obata, Koji (1500) | Won 2-0 | +181489 |
| 2modern | 4 | Yatsu, Tomoki (1518) | Won 2-0 | +191508 |
| 3modern | 221 | Tsukanishi, Toshiyuki (1535) | Won 2-1 | +181526 |
| 4modern | 10 | Ooneda, Yoshihiro (1551) | Won 2-0 | +191545 |
| 5modern | 23 | Yamazaki, Yuuji (1566) | Lost 0-2 | -181527 |
| 6modern | 139 | Tamura, Hajime (1516) | Lost 1-2 | -181509 |
| 7modern | 190 | Mochizuki, Kouta (1520) | Lost 1-2 | -181491 |
| top | average opponent: 1530record: 4-3 | new rating: 1491 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 11 | Ishida, Naomi (1500) | Won 2-0 | +181482 |
| 2extended | 29 | Matsumura, Takehiko (1541) | Won 2-0 | +201502 |
| 3extended | 7 | Kumoura, Daisuke (1845) | Lost 1-2 | -121490 |
| 4extended | 189 | Yurikusa, Nobuo (1484) | Won 2-0 | +171507 |
| 5extended | 160 | Nakazuka, Yuuki (1473) | Lost 0-2 | -181489 |
| 6extended | 197 | Mishima, Hideo (1478) | Lost 1-2 | -181471 |
| top | average opponent: 1554record: 3-3 | new rating: 1471 | ||
| Grand Prix Shizuoka 2008 (MOR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 51 | Nakamura, Fumitake (1428) | Lost 1-2 | -191481 |
| 2standard | 293 | Murase, Teruyuki (1482) | Won 2-0 | +181499 |
| 3standard | 258 | Okano, Tetsuya (1555) | Lost 0-2 | -171482 |
| 4standard | 276 | Inazawa, Ryo (1504) | Lost 0-2 | -181464 |
| 5standard | 346 | Atsumi, Takafumi (1465) | Won 2-1 | +181482 |
| 6standard | 265 | Akita, Naoto (1463) | Lost 0-2 | -181464 |
| top | average opponent: 1483record: 2-4 | new rating: 1464 | ||