Kumagai, Masahiro
Current rating: 1612
Record: 15-9
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1523 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 186 | Nogami, Tokio (1500) | Won 2-0 | +171540 |
| 2standard | 114 | Kurata, Shintaro (1549) | Won 2-0 | +191559 |
| 3standard | 194 | Itou, Tomoya (1567) | Lost 1-2 | -181541 |
| 4standard | 913 | Okada, Seiji (1707) | Lost 1-2 | -151526 |
| 5standard | 870 | Ichikawa, Kazuyuki (1402) | Won 2-0 | +161542 |
| 6standard | 925 | Sano, Kentarou (1453) | Lost 0-2 | -201522 |
| 7standard | 982 | Tsukada, Hiroshi (1489) | Won 2-1 | +171539 |
| 8standard | 873 | Matsui, Shintaro (1419) | Won 2-1 | +161555 |
| 9standard | 604 | Kanai, Yuki (1509) | Won 2-1 | +171572 |
| 10standard | 387 | Utiumi, Tomoyuki (1560) | Won 2-1 | +181590 |
| 11standard | 160 | Matsumoto, Yoshifumi (1597) | Won 2-1 | +181608 |
| 12standard | 160 | Kobayashi, Hiroya (1592) | Won 2-0 | +181626 |
| 13standard | 66 | Omori, Wataru (1568) | Lost 1-2 | -191607 |
| 14standard | 144 | Mizutani, Yosuke (1734) | Won 2-0 | +201627 |
| 15standard | 138 | Koyama, Yuji (1764) | Lost 0-2 | -151612 |
| average opponent: 1561record: 10-5 | new rating: 1612 | |||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 766 | Tajima, Daisuke (1509) | Won 2-0 | +181518 |
| 2standard | 479 | Koyama, Yuji (1700) | Lost 0-2 | -151503 |
| 3standard | 783 | Mori, Arashi (1498) | Won 2-0 | +181521 |
| 4standard | 381 | Hamamoto, Yohei (1496) | Won 2-0 | +181539 |
| 5standard | 520 | Senshuu, Yoshinori (1538) | Won 2-0 | +181557 |
| 6standard | 109 | Yoshihara, Tomoki (1723) | Won 2-0 | +211578 |
| 7standard | 80 | Sugihara, Toshihiro (1772) | Lost 0-2 | -151563 |
| 8standard | 221 | Uehara, Shinya (1531) | Lost 1-2 | -181545 |
| 9standard | 372 | Schwenk, Ryan (1327) | Lost 1-2 | -221523 |
| average opponent: 1566record: 5-4 | new rating: 1523 | |||