Yamasaki, Yudai
Current rating: 1674
Record: 95-70-9
- 2000
- 2001
- 2002
- 2009
- 2014
- 2015
- 2016
- 2017
- 2018
- 2019
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1690 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 254 | Kurokawa, Shutaro (1448) | Lost 1-2 | -231667 |
| 3sealed | 761 | Katou, Masaya (1566) | Won 2-1 | +171684 |
| 4sealed | 726 | Kai, Masatoshi (1526) | Draw 1-1 | -31681 |
| 5sealed | 538 | Okamoto, Yasutaka (1492) | Won 2-1 | +141695 |
| 6sealed | 339 | Ozawa, Tomohiko (1527) | Lost 1-2 | -211674 |
| top | average opponent: 1512record: 2-2-1 | new rating: 1674 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1695 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 359 | Imai, Seisuke (1415) | Won 2-1 | +131708 |
| 4modern | 56 | Fukuki, Akito (1666) | Lost 1-2 | -181690 |
| 5modern | 274 | Kobayashi, Ryosuke 2107 (1580) | Won 2-1 | +161706 |
| 6modern | 299 | Kawasaki, Hirotaka (1793) | Lost 1-2 | -171689 |
| 7modern | 281 | Murakami, Souta (1651) | Won 2-0 | +181707 |
| 8modern | 138 | Takahashi, Taro (1609) | Won 2-1 | +161723 |
| 9modern | 112 | Tsutai, Koutarou (1310) | Lost 0-2 | -251698 |
| 10modern | 229 | Liu, Xuan (1740) | Won 2-1 | +181716 |
| 11modern | 185 | Touma, Hiroshi (1494) | Lost 1-2 | -221694 |
| 12modern | 172 | Nakamura, Kazuhiro (1527) | Lost 0-2 | -211673 |
| 13modern | 186 | Niwa, Ryuuta (1661) | Lost 0-2 | -181655 |
| 14modern | 174 | Kabeya, Atsushi (1562) | Won 2-1 | +161671 |
| 15modern | 156 | Sasaki, Yusuke 4501 (1685) | Won 2-0 | +191690 |
| top | average opponent: 1592record: 7-6 | new rating: 1690 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1707 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 504 | Hosaka, Yoshiteru (1921) | Won 2-0 | +221729 |
| 4sealed | 230 | Mukai, Hiroaki (1487) | Lost 0-2 | -221707 |
| 5sealed | 342 | Takahashi, Yuto (1641) | Lost 0-2 | -191688 |
| 6sealed | 346 | Karatsu, Yoshifumi (1583) | Lost 0-2 | -201668 |
| 7sealed | 627 | Yonemura, Tomomi (1388) | Won 2-0 | +131681 |
| 8sealed | 500 | Yan, Xia (1502) | Won 2-1 | +141695 |
| top | average opponent: 1587record: 3-3 | new rating: 1695 | ||
| Grand Prix Singapore 2017 (XLN limited) | starting rating: 1760 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 101 | Casanova, Carlos (1814) | Won 2-1 | +191779 |
| 3sealed | 70 | Li, Maxwell (1557) | Won 2-0 | +141793 |
| 4sealed | 14 | Mokhtaruddin, Mohd Hafiz (1872) | Won 2-0 | +201813 |
| 5sealed | 6 | Chia, Evan En Yao (1477) | Won 2-1 | +121825 |
| 6sealed | 6 | Tanji, Kensuke (1688) | Lost 1-2 | -211804 |
| 7sealed | 39 | Teo, Yuen Peir (1740) | Lost 1-2 | -191785 |
| 8sealed | 502 | Kua, Chun Huat (1772) | Won 2-1 | +181803 |
| 9sealed | 47 | Wang, Haokang (1860) | Lost 0-2 | -171786 |
| 10draft | 86 | Poh, Solomon (1769) | Lost 0-2 | -181768 |
| 11draft | 12 | Huang, Hao-Shan (1871) | Lost 0-2 | -161752 |
| 12draft | 49 | Naide, Kazutaka (1858) | Won 2-0 | +201772 |
| 13draft | 18 | Sia, Pei Ren (1606) | Lost 1-2 | -211751 |
| 14draft | 38 | Xu, Jing (1538) | Lost 0-2 | -221729 |
| 15draft | 34 | Hu, Ken (1534) | Lost 0-2 | -221707 |
| top | average opponent: 1711record: 6-8 | new rating: 1707 | ||
| Grand Prix Hong Kong 2017 (XLN limited) | starting rating: 1776 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 106 | Ellingsen, Jarle (1411) | Won 2-0 | +111787 |
| 2sealed | 32 | Tanaka, Yuuki (1492) | Won 2-0 | +131800 |
| 3sealed | 178 | Mindaro, Joshua (1520) | Won 2-0 | +131813 |
| 4sealed | 65 | Coquia, Mark Joseph (1439) | Won 2-1 | +121825 |
| 5sealed | 42 | Ford, Kyle (1526) | Lost 1-2 | -241801 |
| 6sealed | 1002 | Riphat, Aziz (1717) | Lost 0-2 | -191782 |
| 7sealed | 155 | Oks, Oliver (1860) | Lost 0-2 | -171765 |
| 8sealed | 186 | Lu, Chao (1745) | Lost 1-2 | -181747 |
| 9sealed | 1004 | Setiadi, Frans (1493) | Won 2-1 | +131760 |
| top | average opponent: 1578record: 5-4 | new rating: 1760 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1646 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 32 | Okabayashi, Masanao (1484) | Won 2-1 | +151661 |
| 2sealed | 525 | Endou, Takahiro (1417) | Won 2-0 | +141675 |
| 3sealed | 271 | Sekine, Naoto (1651) | Won 2-1 | +181693 |
| 4sealed | 139 | Prasitthikul, Siam (1504) | Draw 1-1 | -41689 |
| 5sealed | 164 | Shinoda, Akito (1812) | Lost 1-2 | -161673 |
| 6sealed | 353 | Kodera, Daisuke (1537) | Won 2-0 | +161689 |
| 7sealed | 210 | Ohtake, Nobuyuki (1512) | Won 2-1 | +151704 |
| 8sealed | 131 | Date, Tsutomu (1531) | Won 2-1 | +151719 |
| 9sealed | 71 | Naide, Kazutaka (1907) | Lost 0-2 | -151704 |
| 10draft | 128 | Ito, Keigo (1666) | Won 2-1 | +171721 |
| 11draft | 126 | Hiromasa, Ryuusuke (1713) | Won 2-1 | +181739 |
| 12draft | 125 | Ishikawa, Masayo (1697) | Won 2-1 | +171756 |
| 13draft | 168 | Suzuki, Towa (1559) | Won 2-0 | +151771 |
| 14draft | 145 | Harane, Kenta (2064) | Won 2-1 | +231794 |
| 15draft | 116 | Samejima, Ippei (1774) | Lost 1-2 | -181776 |
| top | average opponent: 1655record: 11-3-1 | new rating: 1776 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1660 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 787 | Nishioka, Yugo (1484) | Won 2-0 | +151675 |
| 2modern | 270 | Endo, Yasuhiko (1452) | Lost 0-2 | -221653 |
| 3modern | 933 | Yong, Jung (1480) | Won 2-0 | +151668 |
| 4modern | 875 | Yu, Yonaiyama (1517) | Won 2-1 | +151683 |
| 5modern | 417 | Sakimura, Akihiko (1714) | Won 2-1 | +191702 |
| 6modern | 357 | Katagiri, Kazushi (1660) | Lost 0-2 | -191683 |
| 7modern | 283 | Aoki, Yoshitsugu (1704) | Lost 0-2 | -181665 |
| 8modern | 580 | Hotta, Kei (1609) | Lost 1-2 | -191646 |
| top | average opponent: 1578record: 4-4 | new rating: 1646 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1643 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 47 | Nakajima, Jun (1429) | Won 2-0 | +151658 |
| 2sealed | 173 | Murata, Toshiaki (1848) | Won 2-1 | +211679 |
| 3sealed | 91 | Tanaka, Rizumu (1614) | Lost 1-2 | -191660 |
| 4sealed | 594 | Nasu, Kenichi (1477) | Won 2-0 | +151675 |
| 5sealed | 533 | Hashimoto, Tomohito (1538) | Won 2-0 | +151690 |
| 6sealed | 186 | Fukuya, Kenji (1492) | Won 2-0 | +141704 |
| 7sealed | 112 | Mori, Shotaro (1603) | Lost 0-2 | -191685 |
| 8sealed | 185 | Wada, Hiroya (1695) | Lost 1-2 | -181667 |
| 9sealed | 374 | Katagiri, Akihito (1626) | Won 2-0 | +171684 |
| 10draft | 57 | Nakamura, Atsushi (1737) | Lost 0-2 | -171667 |
| 11draft | 55 | Yasu, Ryotaro (1521) | Lost 0-2 | -211646 |
| 12draft | 52 | Sato, Yusei (1529) | Won 2-0 | +161662 |
| 13draft | 197 | Shimizu, Toshiki (1656) | Won 2-0 | +181680 |
| 14draft | 234 | Nisii, Tatsuya (1574) | Lost 0-2 | -201660 |
| top | average opponent: 1596record: 8-6 | new rating: 1660 | ||
| Grand Prix Singapore 2015 (modern) | starting rating: 1643 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 284 | Wang, Eng Pheng (1454) | Won 2-0 | +141657 |
| 2modern | 161 | Tan, Kok Wei (1450) | Draw 1-1 | -31654 |
| 3modern | 243 | Ranguetat-Castaingts, (1518) | Lost 0-2 | -211633 |
| 4modern | 368 | Chen Howe, Ho (1499) | Won 2-0 | +161649 |
| 5modern | 252 | Choon Hoe, Loke (1516) | Won 2-1 | +151664 |
| 6modern | 163 | Carlos, Aaron (1594) | Won 2-1 | +171681 |
| 7modern | 96 | Wijaya, Christian (1521) | Lost 0-2 | -211660 |
| 8modern | 162 | Hung, Hsun Hao (1732) | Lost 0-2 | -171643 |
| top | average opponent: 1535record: 4-3-1 | new rating: 1643 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1664 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 342 | Kouno, Takahiro (1500) | Lost 0-2 | -211643 |
| top | record: 0-1 | new rating: 1643 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1687 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 714 | Takenouchi, Tatsuya (1559) | Won 2-1 | +151702 |
| 3modern | 827 | Fukudome, Yuu (1517) | Lost 0-2 | -211681 |
| 4modern | 928 | Nishiwaki, Tatsuya (1531) | Won 2-0 | +151696 |
| 5modern | 879 | Itou, Masayoshi (1443) | Lost 1-2 | -221674 |
| 6modern | 908 | Isaka, Motoki (1478) | Won 2-1 | +141688 |
| 7modern | 844 | Singh, Devsharan (1583) | Lost 1-2 | -201668 |
| 8modern | 897 | Yanagida, Yuya (1459) | Won 2-0 | +141682 |
| 9modern | 854 | Yamakita, Yuya (1641) | Lost 1-2 | -181664 |
| top | average opponent: 1526record: 4-4 | new rating: 1664 | ||
| Grand Prix Taipei 2014 (M15 limited) | starting rating: 1684 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 127 | Suzuki, Masatsuna (1729) | Lost 0-2 | -171667 |
| 3sealed | 193 | Zhang, Hongqiang (1596) | Lost 0-2 | -201647 |
| 4sealed | 319 | Hsu, Henry (1525) | Won 2-0 | +161663 |
| 5sealed | 296 | Chang, Tzu Chien (1500) | Draw 1-1 | -31660 |
| 6sealed | 260 | Gonzalez, Seth (1499) | Won 2-0 | +151675 |
| 7sealed | 180 | Wang, Minsheng (1536) | Won 2-0 | +161691 |
| 8sealed | 134 | Wang, Tao-Yi (1571) | Lost 0-2 | -201671 |
| 9sealed | 158 | Chua, Daniel Boon Hwee (1563) | Won 2-1 | +161687 |
| top | average opponent: 1565record: 4-3-1 | new rating: 1687 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1690 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 46 | Yamada, Atsushi (1538) | Lost 1-2 | -211669 |
| 2sealed | 288 | Sinohara, Hiroki (1480) | Won 2-0 | +151684 |
| 3sealed | 220 | Hamada, Yuusai (1507) | Won 2-0 | +141698 |
| 4sealed | 247 | Samaru, Takafumi (1519) | Lost 1-2 | -211677 |
| 5sealed | 220 | Shike, Kentarou (1501) | Won 2-1 | +151692 |
| 6sealed | 141 | Houjo, Chihiro (1410) | Won 2-0 | +131705 |
| 7sealed | 169 | Ikuta, Kazuya (1527) | Lost 1-2 | -211684 |
| top | average opponent: 1497record: 4-3 | new rating: 1684 | ||
| Grand Prix Kitakyushu 2009 (ZEN limited) | starting rating: 1716 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 67 | Tanaka, Hisaya (1698) | Lost 1-2 | -181698 |
| 3sealed | 146 | Kawasaki, Shingo (1446) | Won 2-1 | +131711 |
| 4sealed | 119 | Matsuyama, Satoshi (1508) | Lost 1-2 | -211690 |
| top | average opponent: 1551record: 1-2 | new rating: 1690 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1715 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 58 | Murakami, Yuki (Osaka) (1560) | Won 2-0 | +151730 |
| 4sealed | 44 | Harada, Hiroshi (1615) | Won 2-1 | +161746 |
| 5sealed | 19 | Yokoyama, Tadashi (1756) | Lost 1-2 | -181728 |
| 6sealed | 54 | Shvartsman, Alex (1928) | Lost 1-2 | -141714 |
| 7sealed | 69 | Ueta, Hiroki (1580) | Won 2-1 | +151729 |
| 8draft | 29 | Nagayama, Hiroyuki (1524) | Won 2-1 | +151744 |
| 9draft | 17 | Takakuwa, Akihiro (1697) | Won 2-0 | +171761 |
| 10draft | 11 | Nakajima, Chikara (1622) | Lost 0-2 | -211740 |
| 11draft | 20 | Tsujimoto, Hideki (1576) | Lost 0-2 | -211719 |
| 12draft | 24 | Nakamura, Satoshi (1611) | Won 2-1 | +161735 |
| 13draft | 20 | Niwa, Toshiharu (1672) | Lost 1-2 | -191716 |
| top | average opponent: 1649record: 6-5 | new rating: 1716 | ||
| Grand Prix Sendai 2001 (extended) | starting rating: 1649 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 30 | Hegstad, Brian (1942) | Won 2-0 | +231672 |
| 5extended | 8 | Haneda, Daisuke (1668) | Draw 1-1 | 01672 |
| 6extended | 11 | Okamoto, Jin (1699) | Lost 1-2 | -171655 |
| 7extended | 41 | Mitsuma, Takayuki (1555) | Won 2-0 | +161671 |
| 8extended | 19 | Hata, Fumihiro (1580) | Won 2-1 | +161687 |
| 9extended | 14 | Wong, Nicholas Jonathan (1756) | Lost 0-2 | -171670 |
| 10extended | 26 | Kanda, Satoshi (1550) | Won 2-1 | +161686 |
| 11extended | 18 | Murakami, Yuki (Osaka) (1569) | Lost 1-2 | -201666 |
| 12extended | 13 | Ozawa, Takeshi (1534) | Won 2-1 | +161682 |
| 13extended | 18 | Abe, Natsuki (1596) | Won 2-0 | +161698 |
| 14extended | 1 | Ikeda, Tsuyoshi (1634) | Won 2-0 | +171715 |
| top | average opponent: 1644record: 7-3-1 | new rating: 1715 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1564 | |||
| round | table | opponent (rating) | result | Δrating |
| 4block | 9 | Ishikawa, Ren (1484) | Draw 1-1 | -11563 |
| 5block | 70 | Itadani, Eisaku (1768) | Won 2-1 | +211584 |
| 6block | 41 | Takagi, Takeshi (1604) | Lost 1-2 | -171567 |
| 7block | 106 | Aoki, Takamasa (1507) | Won 2-0 | +171584 |
| 8block | 63 | Sakai, Hideyuki (1520) | Won 2-1 | +171601 |
| 9block | 33 | Yamamoto, Akimasa (1556) | Won 2-1 | +171618 |
| 10block | 20 | Nagayasu, Ryota (1588) | Won 2-0 | +171635 |
| 11block | 10 | Maki, Koichiro (1508) | Draw 1-1 | -21633 |
| 12block | 23 | Oomori, Kazuki (1583) | Lost 0-2 | -191614 |
| 13block | 36 | Shikamoto, Hideki (1591) | Lost 0-2 | -181596 |
| 14block | 45 | Ijuin, Keisuke (1591) | Won 2-1 | +171613 |
| 15block | 36 | Okugawa, Shoji (1578) | Won 2-1 | +181631 |
| 16block | 26 | Iwai, Tsuyoshi (1639) | Won 2-1 | +181649 |
| top | average opponent: 1578record: 8-3-2 | new rating: 1649 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1573 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 153 | Kobayashi, Yasushi (1500) | Won 2-0 | +171590 |
| 2sealed | 11 | Matsuyama, Tomofumi (1484) | Lost 1-2 | -201570 |
| 3sealed | 100 | Takagi, Takeshi (1519) | Lost 1-2 | -191551 |
| 4sealed | 178 | Kumagai, Hiroaki (1482) | Draw 1-1 | -11550 |
| 5sealed | 142 | Watanabe, Sho (1482) | Won 2-1 | +171567 |
| 6sealed | 107 | Kobashi, Hideto (1500) | Lost 0-2 | -201547 |
| 7sealed | 108 | Mihara, Takumi (1482) | Won 2-0 | +171564 |
| top | average opponent: 1493record: 3-3-1 | new rating: 1564 | ||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 129 | Seo, Taiki (1500) | Won 2-1 | +181518 |
| 3extended | 121 | Ando, Reiji (1464) | Won 2-1 | +171535 |
| 4extended | 58 | Nakamura, Kazuhiro (1500) | Won 2-0 | +171552 |
| 5extended | 10 | Tsukamoto, Toshiki (1628) | Lost 0-2 | -161536 |
| 6extended | 41 | Tsuji, Hisashi (1554) | Draw 1-1 | 01536 |
| 7extended | 61 | Shibasaki, Yoshihiro (1519) | Won 2-0 | +181554 |
| 8extended | 33 | Okamoto, Jin (1531) | Won 2-0 | +171571 |
| 9extended | 20 | Asahara, Akira (1556) | Won 2-0 | +181589 |
| 10extended | 11 | Sanno, Naoki (1612) | Lost 1-2 | -181571 |
| 11extended | 21 | Higashino, Masayuki (1633) | Won 2-0 | +201591 |
| 12extended | 14 | Sano, Fumihiko (1619) | Lost 1-2 | -181573 |
| 13extended | 18 | Andou, Koutarou (1568) | Won 2-1 | +181591 |
| 14extended | 12 | Otani, Akiyuki (1607) | Lost 0-2 | -181573 |
| top | average opponent: 1561record: 8-4-1 | new rating: 1573 | ||