Yamamoto, Keiichi
Current rating: 1519
Record: 67-70-2
- 2007
- 2008
- 2010
- 2011
- 2012
- 2014
- 2015
- 2016
- 2017
- 2018
- 2019
- 2020
- 2023
| Regional Championships Chiba 2023 (pioneer) | starting rating: 1571 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 88 | Hasegawa, Shinya (1599) | Won 2-0 | +181589 |
| 2pioneer | 30 | Hayashi, Takatomo (1717) | Lost 1-2 | -161573 |
| 3pioneer | 51 | Yakushi, Hideki (1583) | Lost 1-2 | -171556 |
| 4pioneer | 95 | Fujimoto, Tomoya (1477) | Lost 0-2 | -201536 |
| 5pioneer | 85 | Ueki, Yuuya (1579) | Lost 1-2 | -171519 |
| top | average opponent: 1591record: 1-4 | new rating: 1519 | ||
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1588 | |||
| round | table | opponent (rating) | result | Δrating |
| 3pioneer | 252 | Hirose, Yutaka (1287) | Lost 1-2 | -231565 |
| 4pioneer | 265 | Kawa, Hirokazu (1298) | Won 2-0 | +131578 |
| 5pioneer | 166 | Shimura, Takeshi (1201) | Won 2-1 | +121590 |
| 6pioneer | 63 | Koh, Kai Che (1632) | Lost 1-2 | -181572 |
| 7pioneer | 177 | Uno, Yuki (1505) | Won 2-0 | +171589 |
| 8pioneer | 130 | Mayama, Syouta (1556) | Lost 0-2 | -181571 |
| top | average opponent: 1413record: 3-3 | new rating: 1571 | ||
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1583 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 241 | Tsujimoto, Hideki (1490) | Won 2-1 | +161599 |
| 4standard | 150 | Gao, Yi (1691) | Lost 1-2 | -161583 |
| 5standard | 265 | Yamada, Takuya (1716) | Lost 1-2 | -161567 |
| 6standard | 368 | Fukushima, Yuuhei (1534) | Lost 0-2 | -181549 |
| 7standard | 430 | Awane, Hiroyuki (1472) | Won 2-1 | +161565 |
| 8standard | 395 | Moriya, Jun (1846) | Won 2-1 | +231588 |
| top | average opponent: 1625record: 3-3 | new rating: 1588 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1576 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 260 | Ebisujima, Isao (1500) | Won 2-1 | +171593 |
| 4sealed | 52 | Nakashima, Atsushi (2009) | Lost 0-2 | -111582 |
| 5sealed | 168 | Chiu, Chris (1517) | Won 2-0 | +171599 |
| 6sealed | 214 | Kawakami, Sintarou (1539) | Lost 0-2 | -191580 |
| 7sealed | 413 | Matsuda, Yuuki1037 (1749) | Draw 1-1 | +31583 |
| top | average opponent: 1663record: 2-2-1 | new rating: 1583 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1559 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 174 | Matsuda, Issui (1578) | Won 2-1 | +181577 |
| 4modern | 189 | Sawada, Ryo (1406) | Won 2-0 | +151592 |
| 5modern | 51 | Kajiwara, Tomoki (1451) | Won 2-1 | +161608 |
| 6modern | 30 | Hori, Masataka (1816) | Lost 1-2 | -151593 |
| 7modern | 96 | Yoshimura, Wataru (1436) | Lost 1-2 | -201573 |
| 8modern | 210 | Horie, Tooru (1771) | Won 2-1 | +211594 |
| 9modern | 159 | Ishikawa, Fumiaki (1682) | Lost 1-2 | -161578 |
| 10modern | 171 | Tokairin, Taishi (1502) | Lost 0-2 | -201558 |
| 11modern | 198 | Motooka, Takahiro (1628) | Lost 0-2 | -161542 |
| 12modern | 209 | Liu, Jin 8012 (1574) | Won 2-0 | +181560 |
| 13modern | 192 | Kanda, Akihiro (1435) | Won 2-0 | +161576 |
| 14modern | 159 | Yuuki, Kanayama (1577) | Won 2-0 | +181594 |
| 15modern | 112 | Ma, Yiyuan (1616) | Lost 1-2 | -181576 |
| top | average opponent: 1575record: 7-6 | new rating: 1576 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1545 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 181 | Itagaki, Yota (1597) | Won 2-1 | +191564 |
| 4standard | 94 | Hirayama, Shigetaka (1804) | Won 2-0 | +221586 |
| 5standard | 92 | Nakamura, Junya (1662) | Lost 1-2 | -161570 |
| 6standard | 95 | Tanahashi, Masayasu (1920) | Lost 0-2 | -121558 |
| 7standard | 409 | Takiguchi, Yuta (1644) | Won 2-1 | +191577 |
| 8standard | 295 | Sasaki, Toshiya (1555) | Lost 1-2 | -181559 |
| top | average opponent: 1697record: 3-3 | new rating: 1559 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 303 | Tanaka, Shun (1497) | Lost 0-2 | -191516 |
| 4standard | 688 | Moriyama, Yuu (1659) | Won 2-0 | +211537 |
| 5standard | 424 | Ishihara, Jun (1766) | Lost 0-2 | -141523 |
| 6standard | 484 | Fujii, Akira (1580) | Won 2-0 | +191542 |
| 7standard | 389 | Shiroma, Hiroshi (1672) | Lost 0-2 | -151527 |
| 8standard | 578 | Han, Yi (1557) | Won 2-0 | +181545 |
| top | average opponent: 1622record: 3-3 | new rating: 1545 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1529 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 147 | Hiraki, Takayoshi (1660) | Won 2-0 | +211550 |
| 4legacy | 77 | Keung, Lap Shing Lawrence (1467) | Won 2-0 | +161566 |
| 5legacy | 32 | Shinohara, Gen 8933 (1511) | Lost 0-2 | -191547 |
| 6legacy | 48 | Ideue, Yuuki (1560) | Lost 1-2 | -171530 |
| 7legacy | 185 | Takahashi, Kenji (1566) | Lost 1-2 | -181512 |
| 8legacy | 212 | Lai, Pak Yin (1787) | Won 2-1 | +231535 |
| top | average opponent: 1592record: 3-3 | new rating: 1535 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1621 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 357 | Katou, Susumu (1603) | Lost 1-2 | -191602 |
| 4sealed | 733 | Kimura, Shigeki (1774) | Lost 0-2 | -151587 |
| 5sealed | 880 | Koga, Ryuji (1614) | Lost 0-2 | -171570 |
| 6sealed | 725 | Ashizawa, Yoshisato (1413) | Lost 1-2 | -211549 |
| 7sealed | 705 | Uemura, Akira (1462) | Lost 1-2 | -201529 |
| top | average opponent: 1573record: 0-5 | new rating: 1529 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1642 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 488 | Watanabe, Joe (1432) | Lost 0-2 | -211621 |
| top | record: 0-1 | new rating: 1621 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 342 | Inoue, Kazuhei (1465) | Won 2-0 | +181505 |
| 2modern | 412 | Takeda, Daisuke (1538) | Lost 1-2 | -171488 |
| 3modern | 939 | Norimasa, Norimasa (1496) | Lost 0-2 | -181470 |
| 4modern | 1144 | Kanou, Takuya (1489) | Won 2-0 | +181488 |
| 5modern | 972 | Choi, Suouk (1494) | Won 2-0 | +181506 |
| 6modern | 444 | Hiwatashi, Yasurou (1671) | Won 2-1 | +211527 |
| 7modern | 606 | Fujita, Shunya (1519) | Won 2-1 | +181545 |
| 8modern | 283 | Sugimura, Yoshiyasu (1729) | Won 2-0 | +211566 |
| 9modern | 196 | Ayama, Takashi (1743) | Won 2-0 | +211587 |
| 10modern | 125 | Sugimoto, Yuuki (1702) | Won 2-1 | +211608 |
| 11modern | 80 | Ikeda, Ippei (1604) | Won 2-0 | +171625 |
| 12modern | 60 | Hart, Jacob (1806) | Lost 1-2 | -141611 |
| 13modern | 133 | Tomomura, Hitoshi (1941) | Won 2-1 | +241635 |
| 14modern | 65 | Ji, Zihao (1854) | Won 2-0 | +211656 |
| 15modern | 51 | Kawamura, Kazushi (1877) | Lost 0-2 | -141642 |
| top | average opponent: 1662record: 11-4 | new rating: 1642 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1557 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 479 | Otsuka, Yasumasa (1434) | Lost 0-2 | -211536 |
| 2standard | 897 | Sugasawa, Tomoyuki (1433) | Lost 1-2 | -191517 |
| 3standard | 1275 | Yahiro, Kenji (1463) | Lost 1-2 | -191498 |
| 4standard | 1245 | Ootsu, Takuya (1452) | Won 2-0 | +171515 |
| 5standard | 1153 | Kashi, Touru (1417) | Lost 0-2 | -201495 |
| 6standard | 1149 | Tsukada, Hiroshi (1361) | Won 2-0 | +151510 |
| 7standard | 1034 | Tanaka, Mami (1319) | Lost 0-2 | -211489 |
| 8standard | 917 | Morokuma, Akira (1416) | Won 2-1 | +171506 |
| 9standard | 815 | Saegusa, Nobuyuki (1484) | Lost 1-2 | -191487 |
| top | average opponent: 1420record: 3-6 | new rating: 1487 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1582 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 1079 | Kashi, Touru (1468) | Won 2-0 | +161598 |
| 2standard | 578 | Nakamura, Satoshi (Chiba) (1501) | Lost 0-2 | -191579 |
| 3standard | 842 | Hikota, Yuuya (1499) | Won 2-1 | +161595 |
| 4standard | 816 | Ikeyama, Kei (1584) | Lost 0-2 | -181577 |
| 5standard | 989 | Shirakawa, Hiroaki (1434) | Lost 0-2 | -211556 |
| 6standard | 1115 | Uchiyama, Kouichi (1378) | Won 2-0 | +151571 |
| 7standard | 836 | Kawamura, Kazushi (1765) | Lost 1-2 | -141557 |
| top | average opponent: 1518record: 3-4 | new rating: 1557 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 341 | Kang, Songyong (1500) | Won 2-0 | +181536 |
| 2sealed | 186 | Matsushita, Takayuki (1584) | Won 2-0 | +191555 |
| 3sealed | 229 | Nakae, Kazusi (1471) | Won 2-1 | +161571 |
| 4sealed | 95 | Oikawa, Kouhei (1554) | Won 2-1 | +181589 |
| 5sealed | 33 | Heng, Chye Hwee (1820) | Lost 1-2 | -141575 |
| 6sealed | 100 | Aoki, Takuya (1656) | Won 2-1 | +191594 |
| 7sealed | 80 | Koseki, Kouta (1609) | Won 2-1 | +191613 |
| 8sealed | 10 | Nakayama, Takuya (1778) | Lost 1-2 | -151598 |
| 9sealed | 97 | Juumonji, Ryou (1749) | Lost 0-2 | -161582 |
| top | average opponent: 1636record: 6-3 | new rating: 1582 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 984 | Sakai, Toshinori (1574) | Lost 1-2 | -161485 |
| 2modern | 1129 | Horii, Naoki (1482) | Won 2-0 | +181503 |
| 3modern | 968 | Suzuki, Gou (1462) | Lost 1-2 | -191484 |
| 4modern | 1189 | Suzuki, Masaya (1389) | Lost 1-2 | -201464 |
| 5modern | 1158 | Hirota, Yuuji (1469) | Won 2-0 | +181482 |
| 6modern | 1046 | Koba, Kenichiro (1476) | Won 2-1 | +181500 |
| 7modern | 969 | Inui, Takeshi (1506) | Won 2-1 | +181518 |
| top | average opponent: 1480record: 4-3 | new rating: 1518 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1454 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 282 | Masuda, Ryou (1500) | Won 2-1 | +191473 |
| 2standard | 172 | Yamauchi, Kazushi (1437) | Won 2-1 | +171490 |
| 3standard | 179 | Usou, Akitoshi (1537) | Won 2-0 | +191509 |
| 4standard | 80 | Terasawa, Kazuya (1732) | Lost 0-2 | -141495 |
| 5standard | 337 | Fukunaga, Nao (1489) | Won 2-0 | +181513 |
| 6standard | 192 | Yoshida, Takefumi (1558) | Won 2-1 | +191532 |
| 7standard | 140 | Hirata, Minoru (1686) | Lost 1-2 | -151517 |
| 8standard | 234 | Honda, Atsuo (1661) | Lost 1-2 | -161501 |
| top | average opponent: 1575record: 5-3 | new rating: 1501 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 270 | Sekiguchi, Kota (1500) | Lost 0-2 | -181472 |
| 2modern | 517 | Takizawa, Ryouta (1482) | Lost 0-2 | -181454 |
| top | average opponent: 1491record: 0-2 | new rating: 1454 | ||
| Grand Prix Kobe 2011 (extended) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 1 | Kugi, Takeshi (1406) | Lost 0-2 | -191463 |
| 2extended | 272 | Yoshida, Takehiro (1481) | Won 2-1 | +181481 |
| 3extended | 195 | Nagashima, Makoto (1708) | Won 2-1 | +221503 |
| 4extended | 134 | Hasegawa, Tsuguto (1437) | Won 2-1 | +171520 |
| 5extended | 140 | Hayashi, Shouya (1549) | Lost 1-2 | -181502 |
| 6extended | 140 | Ino, Kentaro (1805) | Lost 1-2 | -121490 |
| top | average opponent: 1564record: 3-3 | new rating: 1490 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 63 | Tanahashi, Hirofumi (1483) | Won 2-1 | +191474 |
| 2extended | 119 | Futami, Yousuke (1518) | Won 2-0 | +191493 |
| 3extended | 107 | Niimi, Kiyoaki (1631) | Lost 0-2 | -161477 |
| 4extended | 229 | Hishida, Akinori (1506) | Won 2-1 | +191496 |
| 5extended | 81 | Nagasaki, Ryou (1484) | Draw 1-1 | -11495 |
| 6extended | 150 | Kishida, Hirokazu (1596) | Lost 0-2 | -161479 |
| 7extended | 207 | Nagata, Masaya (1520) | Won 2-0 | +191498 |
| 8extended | 150 | Nuruki, Hiroaki (1610) | Lost 0-2 | -161482 |
| top | average opponent: 1543record: 4-3-1 | new rating: 1482 | ||
| Grand Prix Kobe 2008 (Lorwyn block) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 188 | Kikuchi, Yuuji (1507) | Lost 0-2 | -171430 |
| 2block | 338 | Beppu, Daniel H (1456) | Won 2-0 | +191449 |
| 3block | 292 | Fujino, Kousin (1499) | Won 2-1 | +181467 |
| 4block | 190 | Izumi, Masaru (1526) | Lost 0-2 | -161451 |
| 5block | 251 | Goto, Yusei (1521) | Won 2-0 | +191470 |
| 6block | 180 | Yamamoto, Akimasa (1666) | Lost 0-2 | -151455 |
| top | average opponent: 1529record: 3-3 | new rating: 1455 | ||
| Grand Prix Kyoto 2007 (PLC standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 37 | Tukamoto, Takuya (1500) | Lost 0-2 | -181482 |
| 2standard | 340 | Shoji, Kenta (1538) | Lost 1-2 | -171465 |
| 3standard | 333 | Hiroi, Genki (1463) | Lost 0-1 | -181447 |
| top | average opponent: 1500record: 0-3 | new rating: 1447 | ||