Ohtsubo, Masashi
Current rating: 1473
Record: 18-21-1
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 70 | Igagami, Hiroyuki (1466) | Lost 0-2 | -181463 |
| 4standard | 559 | Kawatsu, Shunsuke (1456) | Won 2-0 | +181481 |
| 5standard | 278 | Matsushima, Kenta (1416) | Won 2-1 | +161497 |
| 6standard | 99 | Fujita, Tsuyoshi (1946) | Lost 1-2 | -101487 |
| 7standard | 226 | Urasawa, Taiji (1683) | Lost 0-2 | -141473 |
| top | average opponent: 1594record: 2-3 | new rating: 1473 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1513 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 213 | Hayashi, Shinsuke (1932) | Lost 1-2 | -101503 |
| 4sealed | 362 | Miyata, Dai (1525) | Lost 0-2 | -181485 |
| 5sealed | 733 | Masaki, Arata (1366) | Won 2-1 | +161501 |
| 6sealed | 526 | Urabe, Ryosuke (1538) | Lost 1-2 | -181483 |
| 7sealed | 525 | Tomiyama, Shin (1390) | Won 2-0 | +171500 |
| 8sealed | 441 | Suzuki, Kento (1452) | Lost 1-2 | -191481 |
| top | average opponent: 1534record: 2-4 | new rating: 1481 | ||
| Grand Prix Taipei 2019 (WAR standard) | starting rating: 1545 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 42 | Huang, Wen Che (1638) | Lost 0-2 | -171528 |
| 4standard | 307 | Lam, Hok Chung (1523) | Lost 1-2 | -181510 |
| 5standard | 346 | Onishi, Kouhei (1419) | Won 2-1 | +171527 |
| 6standard | 204 | Su, Yu Hao (1586) | Lost 0-2 | -171510 |
| 7standard | 315 | Chen, Eric (1561) | Won 2-0 | +191529 |
| 8standard | 237 | Yin, Yue (1676) | Lost 0-2 | -161513 |
| top | average opponent: 1567record: 2-4 | new rating: 1513 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1512 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 214 | Takahashi, Osamu (1494) | Won 2-0 | +171529 |
| 3modern | 396 | Carlos, Aaron (1656) | Won 2-1 | +211550 |
| 4modern | 115 | Tan, Richmond (1603) | Won 2-1 | +191569 |
| 5modern | 57 | Fukui, Yui (1526) | Won 2-1 | +171586 |
| 6modern | 53 | Nomiya, Yohei (1864) | Lost 1-2 | -131573 |
| 7modern | 161 | Shinohara, Gen 8933 (1813) | Lost 1-2 | -141559 |
| 8modern | 255 | Mikami, Yoshirou (1758) | Lost 0-2 | -141545 |
| top | average opponent: 1673record: 4-3 | new rating: 1545 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1540 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 248 | Sasagawa, Hitoshi (1470) | Won 2-0 | +161556 |
| 2legacy | 207 | Ikarashi, Satoru (1521) | Won 2-0 | +181574 |
| 3legacy | 64 | Nakanishi, Kazuki (1439) | Lost 1-2 | -211553 |
| 4legacy | 320 | Mizumura, Ryouta (1476) | Won 2-1 | +171570 |
| 5legacy | 274 | Kwan, Philip (1456) | Lost 1-2 | -201550 |
| 6legacy | 401 | Sagara, Taketo (1519) | Lost 0-2 | -191531 |
| 7legacy | 345 | Antonio Miguel, Calma (1497) | Draw 1-1 | 01531 |
| 8legacy | 332 | Itou, Daiki 9873 (1491) | Lost 0-2 | -191512 |
| top | average opponent: 1484record: 3-4-1 | new rating: 1512 | ||
| Grand Prix Hong Kong 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 85 | Dang, Qi (1592) | Lost 0-2 | -161484 |
| 2modern | 236 | Sakuma, Shota (1483) | Lost 0-2 | -181466 |
| 3modern | 414 | Chen, Wenjun (1443) | Lost 0-2 | -191447 |
| 4modern | 412 | Yin, Binchen (1329) | Won 2-0 | +161463 |
| 5modern | 355 | Shi, Shencheng (1480) | Won 2-0 | +181481 |
| 6modern | 298 | Palu-Ay, Matias Monico (1675) | Won 2-1 | +221503 |
| 7modern | 243 | Liu, Yuxiao (1505) | Won 2-0 | +181521 |
| 8modern | 210 | Wang, Gang (1552) | Won 2-0 | +191540 |
| top | average opponent: 1507record: 5-3 | new rating: 1540 | ||