Ohmachi, Masato
Current rating: 1571
Record: 11-7-1
| Grand Prix Yokohama 2019 (modern) | starting rating: 1574 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 754 | Takahashi, Atsushi (1469) | Won 2-0 | +161590 |
| 2modern | 590 | Yamano, Tatsuto (1265) | Lost 1-2 | -241566 |
| 3modern | 564 | Choi, Kiho (1646) | Won 2-1 | +201586 |
| 4modern | 761 | Hosaka, Yoshiteru (1841) | Won 2-0 | +221608 |
| 5modern | 351 | Otahara, Sho (1659) | Lost 0-2 | -171591 |
| 6modern | 711 | Miyawaki, Wataru (1458) | Lost 1-2 | -201571 |
| average opponent: 1556record: 3-3 | new rating: 1571 | |||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 208 | Oogoshi, Takafumi (1500) | Won 2-1 | +181518 |
| 2legacy | 26 | Tanaka, Masamitsu (1519) | Lost 1-2 | -181500 |
| 3legacy | 259 | Hirata, Keiitirou (1534) | Won 2-1 | +191519 |
| 4legacy | 260 | Okutomi, Hiromitsu (1422) | Won 2-0 | +161535 |
| 5legacy | 174 | Nose, Shunsuke (1479) | Won 2-0 | +171552 |
| 6legacy | 100 | Ideue, Tetsuya (1503) | Won 2-0 | +171569 |
| 7legacy | 32 | Mukuno, Yuuji (1746) | Won 2-1 | +211590 |
| 8legacy | 19 | Mihara, Takuya (1524) | Won 2-1 | +171607 |
| 9legacy | 12 | Toma, Hiroto (1603) | Lost 1-2 | -181589 |
| 10legacy | 82 | Naganawa, Yuuki (1665) | Draw 1-1 | +11590 |
| 11legacy | 69 | Hohaus, Daniel (1581) | Won 2-0 | +181608 |
| 12legacy | 41 | Okada, Wataru (1723) | Lost 0-2 | -161592 |
| 13legacy | 71 | Hiraki, Takayoshi (1564) | Lost 0-2 | -181574 |
| average opponent: 1567record: 8-4-1 | new rating: 1574 | |||