Okuyama, Kouhei
Current rating: 1361
Record: 20-32-5
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1299 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 200 | Kabeshita, Yoshito (1551) | Lost 0-2 | -141285 |
| 2sealed | 818 | Tanabe, Taku (1438) | Lost 0-2 | -151270 |
| 3sealed | 1101 | Fukuda, Yoshihiro (1463) | Won 2-1 | +211291 |
| 4sealed | 871 | Takani, Takashi (1254) | Won 2-0 | +181309 |
| 5sealed | 732 | Ainai, Taku (1606) | Won 2-1 | +231332 |
| 6sealed | 399 | Uchihashi, Akihito (1515) | Won 2-0 | +211353 |
| 7sealed | 361 | Shinkai, Yasuhiro (1526) | Won 2-1 | +211374 |
| 8sealed | 308 | Okudera, Taichi (1640) | Lost 0-2 | -131361 |
| top | average opponent: 1499record: 5-3 | new rating: 1361 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1344 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 197 | Sohi, JP (1528) | Lost 0-2 | -151329 |
| 2legacy | 507 | Inhyeok, Yeo (1484) | Lost 1-2 | -151314 |
| 3legacy | 613 | Nakamichi, Minofumi (1464) | Lost 0-2 | -151299 |
| top | average opponent: 1492record: 0-3 | new rating: 1299 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1368 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 43 | Masuda, Sho (1645) | Lost 1-2 | -131355 |
| 2sealed | 659 | Kondou, Hiroshi (1570) | Lost 1-2 | -141341 |
| 3sealed | 1017 | Tutui, Rintaro (1464) | Lost 1-2 | -161325 |
| 4sealed | 1131 | Sasaki, Shun (1342) | Won 2-1 | +191344 |
| top | average opponent: 1505record: 1-3 | new rating: 1344 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1390 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 407 | Hayashi, Masahiko (1468) | Won 2-1 | +191409 |
| 2sealed | 373 | Hasegawa, Kazuhiko (1721) | Lost 0-2 | -121397 |
| 3sealed | 823 | Maruyama, Shouta (1659) | Lost 0-2 | -141383 |
| 4sealed | 957 | Kojima, Yoshimasa (1569) | Lost 0-2 | -141369 |
| 5sealed | 954 | Takayanagi, Kenichi (1463) | Won 2-1 | +191388 |
| 6sealed | 956 | Tanaka, Tomonori (1284) | Lost 1-2 | -201368 |
| top | average opponent: 1527record: 2-4 | new rating: 1368 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 508 | Watanabe, Shogo5163 (1482) | Lost 1-2 | -181444 |
| 2standard | 798 | Ishikawa, Shouzou (1484) | Lost 1-2 | -171427 |
| 3standard | 1171 | Okada, Ryoya (1462) | Lost 1-2 | -171410 |
| 4standard | 1251 | Arai, Ikki (1302) | Lost 1-2 | -201390 |
| top | average opponent: 1432record: 0-4 | new rating: 1390 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1429 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 770 | Kasai, Masafumi (1500) | Won 2-1 | +191448 |
| 2legacy | 472 | Iwasawa, Ryo (1518) | Lost 1-2 | -161432 |
| 3legacy | 852 | Uemura, Akihiro (1611) | Won 2-0 | +211453 |
| 4legacy | 638 | Iwasaki, Sanshirou (1516) | Lost 1-2 | -171436 |
| 5legacy | 875 | Cronin, Sean (1451) | Won 2-1 | +181454 |
| 6legacy | 466 | Kashima, Akihiro (1694) | Won 2-0 | +221476 |
| 7legacy | 313 | Ohashi, Gaku (1599) | Lost 1-2 | -151461 |
| 8legacy | 661 | Kobayashi, Tomoki (1503) | Won 2-0 | +181479 |
| 9legacy | 313 | Kohira, Yoshitaka (1501) | Lost 1-2 | -171462 |
| top | average opponent: 1544record: 5-4 | new rating: 1462 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 182 | Kawabe, Koki (1500) | Lost 0-2 | -181448 |
| 2standard | 916 | Rapetta, Alfredo (1467) | Lost 0-2 | -171431 |
| 3standard | 1624 | Shiraishi, Shinji (1311) | Lost 0-2 | -201411 |
| 4standard | 1593 | Honkawa, Ryouma (1446) | Won 2-0 | +181429 |
| 5standard | 1396 | Hada, Kazumasa (1389) | Won 2-0 | +181447 |
| 6standard | 1195 | Nakamura, Yuuta4577 (1468) | Lost 0-2 | -181429 |
| top | average opponent: 1430record: 2-4 | new rating: 1429 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 819 | Kaneko, Masayuki (1505) | Draw 1-1 | 01502 |
| 2sealed | 598 | Ueda, Tomoki (1500) | Draw 1-1 | 01502 |
| 3sealed | 1077 | Nakano, Kenta (1480) | Lost 0-2 | -181484 |
| 4sealed | 1162 | Kawaguchi, Toshifumi (1497) | Lost 0-2 | -181466 |
| top | average opponent: 1495record: 0-2-2 | new rating: 1466 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1460 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 117 | Yuba, Takayuki (1500) | Lost 0-2 | -171443 |
| 2sealed | 508 | Mizukoshi, Hideyuki (1463) | Won 2-1 | +181461 |
| 3sealed | 498 | Fujita, Taiki (1496) | Won 2-0 | +191480 |
| 4sealed | 361 | Kajita, Yuuki (1584) | Won 2-0 | +191499 |
| 5sealed | 247 | Isa, Yukifumi (1502) | Won 2-1 | +181517 |
| 6sealed | 53 | Taki, Yoshikazu (1472) | Lost 1-2 | -181499 |
| 7sealed | 183 | Takagi, Takeshi (1730) | Won 2-0 | +221521 |
| 8sealed | 92 | Hamamoto, Yohei (1476) | Lost 1-2 | -191502 |
| top | average opponent: 1528record: 5-3 | new rating: 1502 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 803 | Shimazu, Youhei (1457) | Draw 1-1 | -11499 |
| 2legacy | 730 | Sasaki, Yasuhiro (1463) | Lost 1-2 | -181481 |
| 3legacy | 913 | Sasaki, Kazuma (1405) | Draw 1-1 | -21479 |
| 4legacy | 939 | Kentarou, Monma (1484) | Lost 0-2 | -181461 |
| 5legacy | 921 | Fujita, Akihiko (1380) | Draw 1-1 | -11460 |
| top | average opponent: 1438record: 0-2-3 | new rating: 1460 | ||