Matumura, Hirohumi
Current rating: 1603
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1670 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 289 | Miwa, Kohei (1381) | Lost 1-2 | -231647 |
| 2pioneer | 586 | Tsurusawa, Kenta (1518) | Won 2-0 | +151662 |
| 3pioneer | 634 | Ikoma, Toshio (1438) | Won 2-0 | +141676 |
| 4pioneer | 428 | Tazawa, Masaki (1486) | Lost 1-2 | -211655 |
| 5pioneer | 469 | Kondo, Yusuke (1418) | Lost 0-2 | -221633 |
| 6pioneer | 620 | Shinozaki, Takahiro (1465) | Lost 1-2 | -211612 |
| 7pioneer | 524 | Saito, Tomoe (1299) | Lost 0-2 | -241588 |
| 8pioneer | 421 | Hase, Hayato (1444) | Won 2-1 | +151603 |
| top | average opponent: 1431record: 3-5 | new rating: 1603 | ||
| Grand Prix Taipei 2019 (WAR standard) | starting rating: 1651 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 263 | Wen, Wei-Hsun (1454) | Lost 1-2 | -221629 |
| 2standard | 297 | Hermosilla, Alfred Martin (1496) | Lost 0-2 | -201609 |
| 3standard | 499 | Dai, Qian (1464) | Won 2-1 | +151624 |
| 4standard | 403 | Yang, Cheng-Wei (1502) | Won 2-1 | +161640 |
| 5standard | 338 | Chan, Siu Wing (1734) | Lost 1-2 | -161624 |
| 6standard | 408 | Chung, Shun Yu (1489) | Won 2-0 | +151639 |
| 7standard | 266 | Hatakeyama, Dai (1462) | Won 2-0 | +151654 |
| 8standard | 253 | Ho, Tsz Kin (1531) | Won 2-1 | +161670 |
| top | average opponent: 1517record: 5-3 | new rating: 1670 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 533 | Akihito, Terahara (1500) | Won 2-1 | +181518 |
| 2standard | 117 | Robertson, Chris (1613) | Won 2-1 | +201538 |
| 3standard | 641 | Nagano, Keita (1713) | Lost 1-2 | -151523 |
| 4standard | 419 | Kusakawa, Naoto (1500) | Won 2-0 | +171540 |
| 5standard | 683 | Kato, Jun (1548) | Lost 1-2 | -171523 |
| 6standard | 900 | Ogino, Genki (1485) | Won 2-1 | +171540 |
| 7standard | 372 | Aida, Tomomu (1473) | Won 2-1 | +171557 |
| 8standard | 256 | Li, Ang 4241 (1544) | Draw 1-1 | -11556 |
| 9standard | 309 | Iijima, Shin (1553) | Won 2-0 | +181574 |
| 10standard | 195 | Tanaka, Sou (1416) | Won 2-1 | +161590 |
| 11standard | 137 | Takesue, Chikara (1749) | Lost 1-2 | -161574 |
| 12standard | 222 | Usami, Taro (1813) | Won 2-0 | +231597 |
| 13standard | 147 | Tezuka, Yuuki (1590) | Won 2-1 | +181615 |
| 14standard | 102 | Yamaguchi, Satoru (1607) | Won 2-1 | +171632 |
| 15standard | 72 | Urano, Syouta (1641) | Won 2-1 | +191651 |
| top | average opponent: 1583record: 11-3-1 | new rating: 1651 | ||