Yamamoto, Kouhei
Current rating: 1492
Record: 55-54-2
| Grand Prix Yokohama 2019 (modern) | starting rating: 1590 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 471 | Irie, Kousuke (1500) | Lost 0-2 | -201570 |
| 2modern | 624 | Sugita, Ryu (1409) | Lost 0-2 | -201550 |
| 3modern | 1181 | Guo, Kaian (1531) | Lost 0-2 | -191531 |
| 4modern | 1133 | Baba, Kosei (1442) | Lost 0-2 | -191512 |
| 5modern | 1121 | Tsunematsu, Hiroshi (1428) | Lost 0-2 | -201492 |
| top | average opponent: 1462record: 0-5 | new rating: 1492 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1553 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 361 | Zhang, Hongqiang (1624) | Won 2-0 | +201573 |
| 4sealed | 207 | Iwamoto, Yoshiki (1541) | Won 2-0 | +171590 |
| 5sealed | 114 | Ishizaki, Yoshiki (1575) | Lost 0-2 | -181572 |
| 6sealed | 327 | Dai, Xiangjun (1541) | Lost 0-2 | -191553 |
| 7sealed | 434 | Tobiasch, Marc (1947) | Won 2-1 | +251578 |
| 8sealed | 235 | Uemoto, Takahiro (1563) | Lost 1-2 | -181560 |
| 9sealed | 495 | Ishii, Shinji (1536) | Won 2-1 | +171577 |
| 10draft | 207 | Kamo, Riki (1875) | Won 2-0 | +241601 |
| 11draft | 309 | McNeace, Shawn (2021) | Lost 1-2 | -111590 |
| 12draft | 249 | Fujimoto, Takehiro (1763) | Won 2-1 | +211611 |
| 13draft | 189 | Uchida, Satoru (1585) | Won 2-1 | +171628 |
| 14draft | 245 | Nagao, Naoki (1595) | Lost 1-2 | -181610 |
| 15draft | 85 | Sato, Tatsuo (1518) | Lost 0-2 | -201590 |
| top | average opponent: 1668record: 7-6 | new rating: 1590 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1591 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 413 | Kouno, Masami (1537) | Lost 1-2 | -191572 |
| 4modern | 782 | Tezuka, Yo (1907) | Lost 0-2 | -121560 |
| 5modern | 944 | Tomomizu, Takuya (1389) | Won 2-0 | +151575 |
| 6modern | 540 | Nohara, Ryuuji (1495) | Won 2-1 | +161591 |
| 7modern | 294 | Abe, Masao (1543) | Lost 1-2 | -191572 |
| 8modern | 476 | Ishimoto, Yuki (1508) | Lost 0-2 | -191553 |
| top | average opponent: 1563record: 2-4 | new rating: 1553 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 562 | Nakamura, Sara (1670) | Won 2-1 | +211548 |
| 4standard | 42 | Tanaka, Jouji (1556) | Won 2-1 | +181566 |
| 5standard | 26 | Watanabe, Takumi (1576) | Lost 0-2 | -181548 |
| 6standard | 98 | Feng, Da (1773) | Won 2-1 | +221570 |
| 7standard | 146 | Senshuu, Yoshinori (1646) | Lost 0-2 | -161554 |
| 8standard | 391 | Kamiya, Kazuhiro (1430) | Lost 1-2 | -201534 |
| 9standard | 371 | Kawaguchi, Toshifumi (1583) | Won 2-1 | +181552 |
| 10standard | 356 | Oohashi, Keisuke (1664) | Won 2-0 | +201572 |
| 11standard | 233 | Fujiwara, Ryoji (1554) | Lost 1-2 | -181554 |
| 12standard | 231 | Sakou, Yuuta (1578) | Won 2-0 | +191573 |
| 13standard | 243 | Fujiwara, Kazuma0538 (1592) | Won 2-1 | +181591 |
| top | average opponent: 1602record: 7-4 | new rating: 1591 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1558 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 33 | Oiso, Kenji (1697) | Won 2-1 | +211579 |
| 4legacy | 82 | Osawa, Takuya (1990) | Lost 0-2 | -111568 |
| 5legacy | 169 | Akaiwa, Taku (1564) | Lost 0-2 | -181550 |
| 6legacy | 620 | Enomoto, Yuuji (1399) | Lost 0-2 | -211529 |
| 7legacy | 594 | Choi, Kiho (1449) | Draw 1-1 | -21527 |
| top | average opponent: 1620record: 1-3-1 | new rating: 1527 | ||
| Grand Prix Taipei 2014 (M15 limited) | starting rating: 1576 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 81 | Hu, Gin-How (1550) | Won 2-0 | +171593 |
| 4sealed | 76 | Matsubara, Ichiro (1685) | Won 2-0 | +201613 |
| 5sealed | 21 | Chu, Jimmy (1555) | Lost 0-2 | -191594 |
| 6sealed | 92 | Lai, Jin-Xun (1504) | Won 2-1 | +161610 |
| 7sealed | 69 | Huang, Han Shen (1587) | Lost 1-2 | -181592 |
| 8sealed | 72 | Lin, Yi Tang (1550) | Lost 1-2 | -191573 |
| 9sealed | 143 | Tamada, Ryoichi (1738) | Lost 0-2 | -151558 |
| top | average opponent: 1595record: 3-4 | new rating: 1558 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1642 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 651 | Ding, Yi (1484) | Lost 1-2 | -211621 |
| 4sealed | 658 | Takahashi, Kenji (1446) | Lost 0-2 | -211600 |
| 5sealed | 799 | Takeda, Yoshihide (1451) | Won 2-0 | +151615 |
| 6sealed | 725 | Nakayama, Takatsugu (1752) | Lost 1-2 | -151600 |
| 7sealed | 702 | Nishidome, Keitarou (1460) | Lost 1-2 | -211579 |
| 8sealed | 703 | Huang, Yung-Ling (1534) | Lost 1-2 | -191560 |
| 9sealed | 682 | Yuki, Ryosuke (1422) | Won 2-0 | +161576 |
| top | average opponent: 1507record: 2-5 | new rating: 1576 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1639 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 552 | Wood, Christopher (1500) | Won 2-0 | +151654 |
| 4standard | 585 | Miyamoto, Akihiro (1502) | Lost 1-2 | -211633 |
| 5standard | 623 | Hada, Kazumasa (1488) | Won 2-1 | +161649 |
| 6standard | 617 | Taura, Ryuji (1643) | Lost 0-2 | -181631 |
| 7standard | 659 | Nishimoto, Kouhei (1489) | Won 2-1 | +151646 |
| 8standard | 617 | Sakigawara, Yuhei (1537) | Lost 0-2 | -201626 |
| 9standard | 704 | Murao, Masaaki (1506) | Won 2-1 | +161642 |
| top | average opponent: 1524record: 4-3 | new rating: 1642 | ||
| Grand Prix Kitakyushu 2013 (M14 standard) | starting rating: 1674 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 108 | Takami, Yuta (1606) | Won 2-0 | +171691 |
| 4standard | 5 | Shin, Yoo Won (1486) | Won 2-0 | +141705 |
| 5standard | 74 | Kobayashi, Takahito (1861) | Lost 1-2 | -151690 |
| 6standard | 154 | Takahashi, Kazuya (1530) | Won 2-1 | +151705 |
| 7standard | 50 | Matsuya, Rei (1487) | Won 2-0 | +141719 |
| 8standard | 21 | Endo, Jun'Ichi (1676) | Lost 0-2 | -181701 |
| 9standard | 85 | Emi, Shin'ichirou (1562) | Won 2-1 | +151716 |
| 10standard | 24 | Oh, Young Seok (1609) | Won 2-1 | +161732 |
| 11standard | 21 | Matsumoto, Yuki2978 (1915) | Lost 1-2 | -151717 |
| 12standard | 44 | Mitoma, Koji (1582) | Lost 1-2 | -201697 |
| 13standard | 52 | Tamada, Ryoichi (1753) | Lost 1-2 | -171680 |
| 14standard | 69 | Chanboonyawat, Prapruet (1573) | Lost 1-2 | -201660 |
| 15standard | 67 | Toyota, Hiroki (1468) | Lost 1-2 | -211639 |
| top | average opponent: 1624record: 6-7 | new rating: 1639 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 124 | Nojiri, Fumitoshi (1535) | Won 2-1 | +171567 |
| 4sealed | 47 | Morikawa, Youhei (1461) | Won 2-0 | +161583 |
| 5sealed | 51 | Aoyanagi, Toshihiko (1534) | Lost 1-2 | -191564 |
| 6sealed | 74 | Yutaka M., (1574) | Won 2-0 | +191583 |
| 7sealed | 63 | Shiraishi, Tomomi (1809) | Lost 0-2 | -141569 |
| 8sealed | 229 | Saitou, Nobuo (1532) | Won 2-0 | +171586 |
| 9sealed | 282 | Fukuoka, Masayoshi (1585) | Won 2-0 | +181604 |
| 10sealed | 79 | Shin, Takahiro (1593) | Won 2-0 | +181622 |
| 11sealed | 65 | Lau, Toby (1624) | Won 2-0 | +181640 |
| 12draft | 82 | Zhao, Tianyu (1617) | Lost 0-2 | -191621 |
| 13draft | 7 | Kudou, Toshio (1640) | Won 2-1 | +191640 |
| 14draft | 77 | Hirosawa, Yuuichirou (1621) | Won 2-0 | +171657 |
| 15draft | 100 | Kawahama, Yoshikazu (1627) | Won 2-1 | +181675 |
| 16draft | 48 | Ono, Shoichi (1677) | Won 2-0 | +181693 |
| 17draft | 5 | Ogawa, Ryou (1663) | Lost 1-2 | -191674 |
| top | average opponent: 1606record: 11-4 | new rating: 1674 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1577 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 299 | Hayashi, Taihei (1478) | Lost 0-2 | -201557 |
| 4standard | 240 | Takahashi, Yusuke (1516) | Lost 1-2 | -191538 |
| 5standard | 516 | Shimura, Yasuhiko (1467) | Won 2-0 | +171555 |
| 6standard | 456 | Kubo, Hirotaka (1513) | Won 2-0 | +171572 |
| 7standard | 264 | Ohori, Akihito (1446) | Lost 0-2 | -201552 |
| 8standard | 324 | Miyake, Kyohei (1454) | Won 2-1 | +161568 |
| 9standard | 188 | Kawakoshi, Shohei (1526) | Lost 0-2 | -181550 |
| top | average opponent: 1486record: 3-4 | new rating: 1550 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 21 | Takagi, Kuniyuki (1500) | Won 2-0 | +181518 |
| 2block | 179 | Nakatani, Haruki (1560) | Won 2-1 | +191537 |
| 3block | 106 | Fukuchi, Takahiro (1638) | Won 2-0 | +201557 |
| 4block | 33 | Uchida, Takuya (1620) | Won 2-0 | +191576 |
| 5block | 29 | Houwa, Osamu (1506) | Won 2-0 | +161592 |
| 6block | 5 | Taru, Genki (1649) | Lost 0-1 | -161576 |
| 7block | 60 | Ono, Makoto (1541) | Lost 1-2 | -191557 |
| 8block | 50 | Morimoto, Manabu (1619) | ID | 01557 |
| 9block | 76 | Ohta, Shinji (1501) | Won 2-0 | +171574 |
| 10block | 56 | Terada, Atsushi (1638) | Draw 1-1 | +11575 |
| 11block | 65 | Itou, Shuuhei (1579) | Lost 1-2 | -181557 |
| 12block | 84 | Kumoda, Kazuhiro (1579) | Won 2-0 | +191576 |
| 13block | 64 | Endou, Yuusuke (1583) | Lost 0-2 | -181558 |
| 14block | 72 | Yamazaki, Shun (1566) | Won 2-0 | +181576 |
| 15block | 54 | Ishii, Taisuke (1613) | Won 2-1 | +181594 |
| 16block | 40 | Goto, Kosuke (1621) | Lost 0-2 | -171577 |
| top | average opponent: 1582record: 9-5-2 | new rating: 1577 | ||