Watanabe, Kouhei
Current rating: 1766 (#3227)
Record: 43-29-1
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1788 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 98 | Harada, Sosuke (1589) | Lost 0-2 | -221766 |
| top | record: 0-1 | new rating: 1766 | ||
| Grand Prix Hong Kong 2018 (modern) | starting rating: 1777 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 174 | Wu, Xuan (1776) | Won 2-0 | +181795 |
| 4modern | 3 | Huang, Siu Hung (1585) | Won 2-0 | +141809 |
| 5modern | 26 | Wang, Long (1705) | Won 2-0 | +161825 |
| 6modern | 22 | Ohki, Tatsuhiko (1877) | Lost 0-2 | -171808 |
| 7modern | 21 | Tong, Christopher (1832) | Lost 1-2 | -181790 |
| 8modern | 65 | Kaku, Tomohiro (1643) | Won 2-1 | +161806 |
| 9modern | 52 | Fang, Percy (1812) | Lost 0-2 | -181788 |
| top | average opponent: 1747record: 4-3 | new rating: 1788 | ||
| Grand Prix Singapore 2018 (DOM standard) | starting rating: 1679 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 87 | Calucag, Richard (1626) | Won 2-1 | +171696 |
| 4standard | 41 | Pariwono, Edward (1551) | Won 2-0 | +161712 |
| 5standard | 8 | Omori, Ken'ichirou (1898) | Won 2-1 | +211733 |
| 6standard | 23 | Goh, Guo Wei (1716) | Won 2-1 | +181751 |
| 7standard | 12 | Dungan, Conrad (1753) | Won 2-1 | +181769 |
| 8standard | 2 | Chew, Kelvin (2152) | Won 2-0 | +241793 |
| 9standard | 3 | Takimura, Kazuyuki (2082) | Lost 1-2 | -131780 |
| 10standard | 10 | Kojima, Tatuya (1880) | Lost 1-2 | -161764 |
| 11standard | 26 | Utsunomiya, Takumi (1829) | Won 2-0 | +191783 |
| 12standard | 16 | Yao, Zile (1830) | Won 2-0 | +191802 |
| 13standard | 10 | Morofuji, Takuma (2199) | Lost 1-2 | -111791 |
| 14standard | 15 | Kumagai, Riku (1977) | Lost 0-2 | -141777 |
| 15standard | 16 | Hosokawa, Yuya (1816) | ID | 01777 |
| top | average opponent: 1870record: 8-4-1 | new rating: 1777 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1577 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 483 | Itou, Tadahiro (1521) | Won 2-0 | +171594 |
| 2modern | 38 | Ichimi, Kenji (1516) | Lost 0-2 | -191575 |
| 3modern | 792 | Tanaka, Makoto (1284) | Lost 0-2 | -231552 |
| 4modern | 1090 | Narumoto, Kazuya (1478) | Won 2-0 | +161568 |
| 5modern | 701 | Nakamura, Satoshi (1488) | Won 2-0 | +171585 |
| 6modern | 653 | Hu, Shawn (1443) | Lost 1-2 | -211564 |
| 7modern | 674 | Suzuki, Yasuhiko (1503) | Won 2-1 | +171581 |
| 8modern | 666 | Yu, Yonaiyama (1517) | Won 2-0 | +171598 |
| 9modern | 488 | Yamamoto, Takashi (1472) | Won 2-1 | +161614 |
| 10modern | 228 | Kagami, Hajime (1525) | Lost 0-2 | -201594 |
| 11modern | 379 | Cho, Yoon Shin (1494) | Won 2-0 | +161610 |
| 12modern | 248 | Komori, Yuuya (1524) | Won 2-1 | +171627 |
| 13modern | 149 | Miyashiro, Tomoyuki (1577) | Won 2-0 | +171644 |
| 14modern | 168 | Mishima, Wataru (1648) | Won 2-0 | +181662 |
| 15modern | 128 | Canonica, Kevin (1616) | Won 2-1 | +171679 |
| top | average opponent: 1507record: 11-4 | new rating: 1679 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 234 | Satomura, Shunsuke (1619) | Won 2-1 | +201524 |
| 3standard | 158 | Matsumoto, Shou (1426) | Won 2-0 | +161540 |
| 4standard | 98 | Miyawaki, Takayuki (1407) | Won 2-0 | +161556 |
| 5standard | 88 | Kamio, Hiroyuki (1575) | Won 2-1 | +181574 |
| 6standard | 51 | Tsuzaki, Akira (1562) | Lost 0-2 | -181556 |
| 7standard | 197 | Ahn, Seongbeom (1520) | Lost 1-2 | -191537 |
| 8standard | 257 | Koshimura, Takeshi (1684) | Won 2-1 | +211558 |
| 9standard | 263 | Hayashi, Naoki (1594) | Won 2-0 | +181576 |
| 10standard | 154 | Shin, Masayuki (1574) | Lost 1-2 | -181558 |
| 11standard | 126 | Takaya, Syouichi (1579) | Won 2-1 | +191577 |
| 12standard | 179 | Tamura, Chiaki (1540) | Lost 0-2 | -191558 |
| 13standard | 185 | Yamamura, Naoki (1645) | Won 2-0 | +201578 |
| 14standard | 127 | Sotarou, Wada (1585) | Lost 1-2 | -181560 |
| 15standard | 180 | Kobachi, Rikiya (1538) | Won 2-0 | +171577 |
| top | average opponent: 1561record: 9-5 | new rating: 1577 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 168 | Katsuta, Takafumi (1463) | Lost 0-2 | -181465 |
| 2legacy | 752 | Kida, Masashi (1466) | Won 2-0 | +181483 |
| 3legacy | 750 | Ueno, Kota (1551) | Draw 1-1 | +11484 |
| 4legacy | 803 | Katou, Akihiko (1499) | Won 2-0 | +181502 |
| 5legacy | 547 | Itou, Motoki (1665) | Won 2-0 | +211523 |
| 6legacy | 364 | Wakabayashi, Ryou (1505) | Lost 0-2 | -181505 |
| 7legacy | 543 | Kashiwagi, Junichi (1331) | Won 2-0 | +151520 |
| 8legacy | 395 | Nakada, Ryo (1627) | Lost 1-2 | -161504 |
| top | average opponent: 1513record: 4-3-1 | new rating: 1504 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 153 | Ryo, Ooe (1402) | Won 2-0 | +171463 |
| 2sealed | 343 | Hayashi, Tetsuo (1540) | Lost 0-2 | -171446 |
| 3sealed | 885 | Yamamura, Naoki (1501) | Won 2-0 | +191465 |
| 4sealed | 378 | Karatsu, Yoshifumi (1518) | Won 2-1 | +191484 |
| 5sealed | 252 | Yamashita, Yoshiki (1554) | Won 2-1 | +201504 |
| 6sealed | 203 | Ohkura, Ryota (1535) | Lost 1-2 | -181486 |
| 7sealed | 361 | Suzuki, Ryuuichi (1480) | Won 2-0 | +181504 |
| 8sealed | 203 | Morishita, Mizuki (1692) | Lost 0-2 | -151489 |
| 9sealed | 365 | Kaga, Hiroyuki (1482) | Won 2-0 | +181507 |
| 10draft | 376 | Hyodo, Kosuke (1658) | Won 2-1 | +211528 |
| 11draft | 321 | Hara, Yusuke (1716) | Lost 1-2 | -151513 |
| 12draft | 348 | Kokubun, Hiroshi (1719) | Lost 1-2 | -141499 |
| 13draft | 199 | Okada, Yoshikazu (1615) | Lost 0-2 | -161483 |
| top | average opponent: 1570record: 7-6 | new rating: 1483 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 382 | Katsuragi, Atsushi (1482) | Lost 0-2 | -181482 |
| 2sealed | 389 | Sawamoto, Ryosuke (1482) | Lost 0-2 | -181464 |
| 3sealed | 588 | Tomio, Daichi (1462) | Lost 1-2 | -181446 |
| top | average opponent: 1475record: 0-3 | new rating: 1446 | ||