Miwa, Kohei
Current rating: 1374
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1381 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 289 | Matumura, Hirohumi (1670) | Won 2-1 | +231404 |
| 2pioneer | 173 | Miyazaki, Noritsugu (1518) | Won 2-1 | +201424 |
| 3pioneer | 53 | Feng, Da (1554) | Lost 0-2 | -151409 |
| 4pioneer | 462 | Kanamori, Ryousuke (1576) | Lost 1-2 | -151394 |
| 5pioneer | 509 | Liu, Calvin (1612) | Lost 1-2 | -141380 |
| 6pioneer | 615 | Kimura, Kazunari (1444) | Lost 0-2 | -171363 |
| 7pioneer | 525 | Kusunoki, Yuki (1712) | Won 2-0 | +241387 |
| 8pioneer | 379 | Sugiyama, Yuu (1657) | Lost 1-2 | -131374 |
| top | average opponent: 1593record: 3-5 | new rating: 1374 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1443 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 617 | Kuriyama, Takuya (1486) | Lost 1-2 | -171426 |
| 2modern | 625 | Ooike, Rinsei (1422) | Lost 0-2 | -181408 |
| 3modern | 1193 | Yoshida, Shuhei (1509) | Lost 0-2 | -161392 |
| 4modern | 1168 | Onoda, Tasuku (1449) | Won 2-0 | +191411 |
| 5modern | 1013 | Naraya, Takaaki (1690) | Lost 0-2 | -131398 |
| 6modern | 923 | Tsushima, Toshiki (1447) | Lost 0-2 | -181380 |
| 7modern | 843 | Kamezawa, Yoshifumi (1364) | Won 2-1 | +181398 |
| 8modern | 700 | Fukuda, Ayako (1447) | Lost 0-2 | -171381 |
| top | average opponent: 1477record: 2-6 | new rating: 1381 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 236 | Horiuchi, Ikki (1453) | Lost 0-2 | -191481 |
| 2sealed | 402 | Abe, Jun (1434) | Lost 0-2 | -191462 |
| 3sealed | 496 | Tomohiro, Yoshida (1394) | Lost 0-2 | -191443 |
| top | average opponent: 1427record: 0-3 | new rating: 1443 | ||