Kobatake, Atsushi
Current rating: 1580
Record: 14-10
| Grand Prix Hiroshima 2006 (CSP limited) | starting rating: 1510 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 83 | Ogura, Takamasa (1404) | Won 2-0 | +161526 |
| 2sealed | 50 | Kuraoka, Shintarou (1479) | Won 2-0 | +171543 |
| 3sealed | 28 | Nakashiro, Mizuki (1627) | Won 2-0 | +201563 |
| 4sealed | 30 | Kitayama, Masaya (1546) | Lost 1-2 | -181545 |
| 5sealed | 54 | Nose, Koji (1763) | Won 2-0 | +221567 |
| 6sealed | 34 | Asahara, Akira (2067) | Won 2-1 | +261593 |
| 7sealed | 27 | Shiozu, Ryouma (1847) | Lost 0-2 | -131580 |
| top | average opponent: 1676record: 5-2 | new rating: 1580 | ||
| Grand Prix Shizuoka 2003 (MRD limited) | starting rating: 1567 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 172 | Hosaka, Atsushi (1500) | Lost 1-2 | -191548 |
| 2sealed | 240 | Noda, Koji (1518) | Lost 0-2 | -181530 |
| 3sealed | 272 | Iitoi, Fumiaki (1452) | Lost 1-2 | -201510 |
| top | average opponent: 1490record: 0-3 | new rating: 1510 | ||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 69 | Nakayama, Masahiko (1500) | Lost 0-2 | -191517 |
| 2sealed | 314 | Baba, Yasunori (1509) | Won 2-1 | +181535 |
| 3sealed | 229 | Nakamura, Masanori (1500) | Lost 1-2 | -191516 |
| 4sealed | 255 | Horiguchi, Toru (1484) | Won 2-0 | +181534 |
| 5sealed | 146 | Matsuyama, Hikaru (1501) | Won 2-0 | +171551 |
| 6sealed | 141 | Hirabayashi, Ryuta (1515) | Won 2-0 | +171568 |
| 7sealed | 87 | Yasufuku, Akihiro (1551) | Won 2-0 | +181586 |
| 8sealed | 79 | Yamazaki, Kairi (1553) | Lost 0-2 | -191567 |
| top | average opponent: 1514record: 5-3 | new rating: 1567 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 90 | Taka, Norihisa (1500) | Won 2-1 | +181518 |
| 2sealed | 35 | Hojo, Yoshihiro (1518) | Lost 1-2 | -181500 |
| 3sealed | 78 | Harino, Takuichi (1466) | Won 2-0 | +171517 |
| 4sealed | 100 | Matsuo, Yusuke (1519) | Won 2-1 | +181535 |
| 5sealed | 65 | Ueda, Michihisa (1535) | Won 2-0 | +181553 |
| 6sealed | 42 | Igawa, Yoshihiro (1567) | Lost 0-2 | -171536 |
| top | average opponent: 1517record: 4-2 | new rating: 1536 | ||