Ohba, Hiroshi
Current rating: 1679
Record: 30-22
| Grand Prix Yokohama 2019 (modern) | starting rating: 1553 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 131 | Shirasawa, Naoki (1502) | Won 2-0 | +171570 |
| 2modern | 258 | Watanabe, Yohei (1517) | Won 2-1 | +171587 |
| 3modern | 540 | Kusakabe, Yu (1521) | Lost 0-2 | -191568 |
| 4modern | 410 | Nawa, Hiroki (1394) | Won 2-0 | +151583 |
| 5modern | 449 | Na, Jongwon (1681) | Lost 1-2 | -161567 |
| 6modern | 411 | Tezuka, Yuuki (1755) | Won 2-0 | +211588 |
| 7modern | 376 | Mituyasu, Yuki (1691) | Won 2-0 | +201608 |
| 8modern | 201 | Maruya, Takashi (1674) | Won 2-1 | +191627 |
| 9modern | 196 | Yamada, Mitsuhiro (1527) | Won 2-1 | +171644 |
| 10modern | 85 | Ohta, Masataka (1623) | Lost 1-2 | -191625 |
| 11modern | 171 | Usui, Haruki (1734) | Lost 0-2 | -161609 |
| 12modern | 151 | Miki, Kenta (1523) | Won 2-1 | +171626 |
| 13modern | 147 | Nakano, Tatsuhito (1737) | Won 2-0 | +201646 |
| 14modern | 78 | Ito, Sho (1520) | Won 2-0 | +151661 |
| 15modern | 89 | Yoshii, Takayuki (1635) | Won 2-0 | +181679 |
| top | average opponent: 1602record: 11-4 | new rating: 1679 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 449 | Orihiro, Tsuri (1500) | Won 2-1 | +181527 |
| 2legacy | 124 | Nomura, Hiroshi (1540) | Lost 1-2 | -181509 |
| 3legacy | 406 | Yue, Ming (1550) | Won 2-0 | +191528 |
| 4legacy | 188 | Arai, Makoto (1568) | Won 2-0 | +191547 |
| 5legacy | 218 | Maruo, Yuuta (1874) | Lost 1-2 | -131534 |
| 6legacy | 239 | Kawahata, Yuu (1521) | Won 2-1 | +181552 |
| 7legacy | 184 | Kobayashi, Yuuma (1543) | Lost 0-2 | -181534 |
| 8legacy | 253 | Toshikawa, Kento (1612) | Won 2-0 | +191553 |
| top | average opponent: 1589record: 5-3 | new rating: 1553 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 621 | Kubo, Ryoutarou (1734) | Won 2-0 | +221498 |
| 2sealed | 143 | Akaike, Yo (1600) | Lost 0-2 | -161482 |
| 3sealed | 989 | Komine, Syunsuke (1436) | Won 2-0 | +171499 |
| 4sealed | 578 | Lai, Pak Yin (1705) | Lost 1-2 | -141485 |
| 5sealed | 640 | Yoshida, Masafumi (1546) | Won 2-0 | +191504 |
| 6sealed | 502 | Yoon, SooHan (1751) | Won 2-1 | +231527 |
| 7sealed | 357 | Yoshimura, Akira (1549) | Lost 0-2 | -181509 |
| top | average opponent: 1617record: 4-3 | new rating: 1509 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 138 | Hirano, Satohiro (1400) | Won 2-1 | +161505 |
| 2legacy | 68 | O'Brien, Sean (1508) | Won 2-1 | +181523 |
| 3legacy | 28 | Omori, Ken'ichirou (1896) | Won 2-1 | +251548 |
| 4legacy | 289 | Garcia, Marlon (1720) | Lost 1-2 | -151533 |
| 5legacy | 305 | Mendero Jr, Samuel (1536) | Lost 0-2 | -181515 |
| 6legacy | 660 | Takemasa, Tuyosi (1486) | Lost 0-2 | -191496 |
| 7legacy | 612 | Oonishi, Masaya (1436) | Won 2-0 | +171513 |
| 8legacy | 674 | Taniguchi, Kenichi (1525) | Lost 0-2 | -181495 |
| 9legacy | 647 | Oda, Katsumi (1411) | Lost 1-2 | -191476 |
| top | average opponent: 1546record: 4-5 | new rating: 1476 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 189 | Nagai, Yoshio (1431) | Won 2-0 | +171515 |
| 2standard | 604 | Yanagi, Shinichiro (1466) | Won 2-1 | +171532 |
| 3standard | 90 | Hasegawa, Yu (1799) | Lost 0-2 | -131519 |
| 4standard | 488 | Koseki, Yuuji (1575) | Won 2-0 | +191538 |
| 5standard | 456 | Nakamoto, Kosuke (1730) | Lost 0-2 | -151523 |
| 6standard | 723 | Hanada, Keisuke (1548) | Lost 0-2 | -171506 |
| 7standard | 827 | Yamamoto, Masafumi (1553) | Lost 1-2 | -171489 |
| top | average opponent: 1586record: 3-4 | new rating: 1489 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2358 | Matsuura, Takumi (1500) | Won 2-1 | +181518 |
| 2sealed | 2226 | Ohta, Shinji (1458) | Lost 1-2 | -191499 |
| 3sealed | 2295 | Akita, Yuuki (1552) | Won 2-1 | +191518 |
| 4sealed | 2116 | Fujimoto, Kousaku (1564) | Won 2-0 | +191537 |
| 5sealed | 2129 | Hiroi, Yuta (1429) | Lost 1-2 | -201517 |
| 6sealed | 2162 | Tanaka, Keita (1485) | Lost 1-2 | -191498 |
| top | average opponent: 1498record: 3-3 | new rating: 1498 | ||