Ishiguro, Youhei
Current rating: 1659
Record: 60-44-2
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1693 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 230 | Tsujisaka, Shouichi (1528) | Won 2-0 | +151708 |
| 2standard | 111 | Wang, Shensheng (1490) | Lost 1-2 | -211687 |
| 3standard | 814 | Yokono, Yuusuke (1516) | Won 2-0 | +141701 |
| 4standard | 570 | Murata, Futoshi (1483) | Lost 1-2 | -211680 |
| 5standard | 737 | Fujiwara, Tsukasa (1520) | Lost 0-2 | -211659 |
| top | average opponent: 1507record: 2-3 | new rating: 1659 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1726 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 35 | Jiang, Ruihui (1593) | Won 2-1 | +161742 |
| 4modern | 337 | Mashima, Mitsuharu (1750) | Lost 1-2 | -181724 |
| 5modern | 484 | Oikawa, Ryusuke (1631) | Lost 1-2 | -201704 |
| 6modern | 768 | Taniguchi, Yuusuke (1629) | Lost 1-2 | -191685 |
| 7modern | 827 | Endo, Yasuhiko (1446) | Lost 0-2 | -221663 |
| 8modern | 843 | Sugita, Daichi (1617) | Won 2-1 | +171680 |
| 9modern | 643 | Nakamura, Koudai (1444) | Won 2-0 | +131693 |
| top | average opponent: 1587record: 3-4 | new rating: 1693 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1637 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 402 | Meguro, Masahiko (1539) | Lost 1-2 | -191618 |
| 4legacy | 755 | Kodama, Kentaro (1578) | Lost 0-2 | -191599 |
| 5legacy | 917 | Tomoki, Kitamura (1444) | Won 2-1 | +151614 |
| 6legacy | 380 | Shiroza, Shinichiro (1595) | Won 2-1 | +181632 |
| 7legacy | 434 | King, Kevin (1470) | Lost 1-2 | -211611 |
| 8legacy | 431 | Yoshizawa, Kohei (1503) | Won 2-0 | +161627 |
| 9legacy | 272 | Nemoto, Daisuke (1553) | Won 2-1 | +171644 |
| 10legacy | 180 | Tashiro, Kouichi (1646) | Won 2-0 | +181662 |
| 11legacy | 185 | Honda, Rintaro (1679) | Won 2-1 | +181680 |
| 12legacy | 86 | Oiso, Kenji (1755) | Won 2-1 | +191699 |
| 13legacy | 60 | Miyazono, Takeshi (1839) | Won 2-0 | +211720 |
| 14legacy | 33 | Mihara, Makihito (2014) | Lost 1-2 | -131707 |
| 15legacy | 84 | Kawahama, Yoshikazu (1769) | Won 2-0 | +191726 |
| top | average opponent: 1645record: 9-4 | new rating: 1726 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1723 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 569 | Ki, Takayoshi (1517) | Won 2-0 | +151738 |
| 4standard | 265 | Han, Hojae (1751) | Lost 1-2 | -181720 |
| 5standard | 662 | Kobayashi, Yasuhisa (1509) | Won 2-0 | +141734 |
| 6standard | 127 | Nakamura, Hajime (1654) | Lost 0-2 | -191715 |
| 7standard | 409 | Kawa, Hirokazu (1387) | Won 2-0 | +121727 |
| 8standard | 438 | Shimizu, Junji (1660) | Lost 0-2 | -191708 |
| 9standard | 444 | Saito, Keisuke (1419) | Won 2-1 | +131721 |
| 10standard | 461 | Kawamura, Kazushi (1807) | Lost 0-2 | -171704 |
| 11standard | 370 | Kawakami, Tomoyori (1555) | Lost 0-2 | -211683 |
| 12standard | 390 | Koretomo, Yuji (1437) | Won 2-1 | +141697 |
| 13standard | 341 | Aoki, Masatugu (1535) | Lost 1-2 | -211676 |
| 14standard | 296 | Matsuda, Kenji (1494) | Lost 1-2 | -211655 |
| 15standard | 278 | Yamamoto, Shouhei (1693) | Lost 1-2 | -181637 |
| top | average opponent: 1571record: 5-8 | new rating: 1637 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1787 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 108 | Nakamura, Souta (1559) | Lost 0-2 | -221765 |
| 3sealed | 1009 | Kinoshita, Masahiro (1499) | Lost 0-2 | -231742 |
| 4sealed | 870 | Hasegawa, Gaku (1691) | Lost 0-2 | -191723 |
| top | average opponent: 1583record: 0-3 | new rating: 1723 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1786 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 77 | Nishigchi, Hideki (1495) | Won 2-1 | +121798 |
| 3standard | 224 | Tomioka, Teppei (1543) | Won 2-0 | +141812 |
| 4standard | 124 | Itou, Kenshirou (1659) | Lost 1-2 | -211791 |
| 5standard | 201 | Ushiro, Yukinobu (1425) | Lost 1-2 | -241767 |
| 6standard | 631 | Chen, Liang (1683) | Won 2-0 | +161783 |
| 7standard | 462 | Nose, Shunsuke (1469) | Won 2-1 | +131796 |
| 8standard | 343 | Hirayama, Atsushi (1723) | Lost 0-2 | -201776 |
| 9standard | 293 | Tanaka, Makoto (1355) | Won 2-0 | +111787 |
| top | average opponent: 1544record: 5-3 | new rating: 1787 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1678 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 986 | Tanaka, Yu (1567) | Won 2-0 | +161694 |
| 4sealed | 870 | Obata, Ryoichi (1553) | Won 2-1 | +151709 |
| 5sealed | 843 | Fujita, Kenichi (1773) | Lost 0-2 | -171692 |
| 6sealed | 852 | Ohshiba, Atsushi (1501) | Lost 0-2 | -211671 |
| 7sealed | 1014 | Matsumoto, Yoshifumi (1548) | Won 2-1 | +161687 |
| 8sealed | 931 | Nishikawa, Yukihiro (1545) | Won 2-0 | +151702 |
| 9sealed | 871 | Mishima, Keita (1725) | Won 2-0 | +181720 |
| 10draft | 60 | Fukasawa, Shinya (1585) | Won 2-0 | +161736 |
| 11draft | 130 | Yokoyama, Itaru (1683) | Won 2-0 | +171753 |
| 12draft | 20 | Date, Tsutomu (1703) | Won 2-0 | +171770 |
| 13draft | 174 | Takeuchi, Yuu (1654) | Lost 0-2 | -201750 |
| 14draft | 147 | Usami, Taro (1798) | Won 2-0 | +191769 |
| 15draft | 44 | Yoshida, Kazushi (1705) | Won 2-1 | +171786 |
| top | average opponent: 1641record: 10-3 | new rating: 1786 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1654 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 154 | Ogawa, Daiki (1562) | Won 2-1 | +161670 |
| 3legacy | 185 | Niwa, Hotaka (1502) | Lost 1-2 | -211649 |
| 4legacy | 192 | Imai, Yoshihisa (1468) | Won 2-0 | +151664 |
| 5legacy | 182 | Kondou, Keiichi (1571) | Won 2-1 | +161680 |
| 6legacy | 35 | Kajiwara, Shou (1676) | Won 2-1 | +181698 |
| 7legacy | 47 | Tsuchiya, Hideaki (1791) | Lost 0-2 | -161682 |
| 8legacy | 53 | Hayata, Akira (1541) | Lost 0-2 | -211661 |
| 9legacy | 96 | Michibata, Tatsuya (1581) | Won 2-0 | +171678 |
| top | average opponent: 1587record: 5-3 | new rating: 1678 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1607 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 257 | Asano, Kohei (1518) | Won 2-0 | +161623 |
| 3modern | 62 | Koide, Yuichi (1540) | Won 2-1 | +171640 |
| 4modern | 54 | Shoji, Taku (1460) | Won 2-0 | +151655 |
| 5modern | 63 | Eto, Kai (1571) | Lost 1-2 | -201635 |
| 6modern | 119 | Nagai, Mamoru (1597) | Won 2-1 | +171652 |
| 7modern | 109 | Watanabe, Yuuya (2096) | Won 2-1 | +261678 |
| 8modern | 86 | Irmler, Thomas (1585) | Won 2-0 | +161694 |
| 9modern | 56 | Sakai, Souichirou (1590) | Won 2-0 | +161710 |
| 10modern | 17 | Naganawa, Yuuki (1653) | Draw 1-1 | -11709 |
| 11modern | 17 | Okada, Naoya (1695) | Won 2-1 | +181727 |
| 12modern | 11 | Bandou, Junichirou (1816) | Lost 1-2 | -161711 |
| 13modern | 25 | Hung, Hsun Hao (1726) | Lost 0-2 | -181693 |
| 14modern | 53 | Aoyama, Katsuhiko (1624) | Lost 1-2 | -191674 |
| 15modern | 70 | Park, Jong Sun (1560) | Lost 1-2 | -201654 |
| top | average opponent: 1645record: 8-5-1 | new rating: 1654 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 696 | Ito, Masahiro (1632) | Won 2-0 | +201546 |
| 2sealed | 615 | Shimamura, Kazushige (1500) | Won 2-1 | +181564 |
| 3sealed | 633 | Kawabata, Kenshirou (1535) | Won 2-0 | +171581 |
| 4sealed | 601 | Takeda, Hiroki (1610) | Draw 1-1 | +11582 |
| 5sealed | 552 | Kojima, Shin'ichi (1555) | Won 2-1 | +171599 |
| 6sealed | 526 | Shiozu, Ryouma (1732) | Lost 1-2 | -161583 |
| 7sealed | 577 | Saitou, Keiichirou (1699) | Won 2-0 | +211604 |
| 8sealed | 542 | Kamoi, Ryo (1570) | Lost 1-2 | -191585 |
| 9sealed | 587 | Nakamura, Atsushi (1806) | Won 2-1 | +221607 |
| top | average opponent: 1627record: 6-2-1 | new rating: 1607 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 128 | Kadooka, Toshiyuki (1862) | Won 2-1 | +241542 |
| 5standard | 39 | Kimata, Isao (1584) | Lost 0-2 | -171525 |
| 6standard | 84 | Tsuda, Seiya (1557) | Won 2-0 | +181543 |
| 7standard | 58 | Hino, Tomoaki (1468) | Won 2-1 | +171560 |
| 8standard | 85 | Aizawa, Yuuichi (1671) | Lost 0-2 | -161544 |
| 9standard | 153 | Tarui, Ryota (1576) | Lost 1-2 | -181526 |
| top | average opponent: 1620record: 3-3 | new rating: 1526 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 47 | Hamamoto, Yohei (1508) | Won 2-1 | +181518 |
| 3modern | 115 | Iwasawa, Fumiya (1535) | Won 2-0 | +181536 |
| 4modern | 127 | Tamura, Hajime (1521) | Lost 0-2 | -181518 |
| 5modern | 257 | Kajiro, Shouta (1535) | Won 2-0 | +181536 |
| 6modern | 142 | Kouge, Kazuhiro (1494) | Lost 0-2 | -181518 |
| 7modern | 242 | Tsuboyama, Shuta (1524) | Won 2-1 | +181536 |
| 8modern | 161 | Hoshino, Yohei (1534) | Lost 0-2 | -181518 |
| top | average opponent: 1522record: 4-3 | new rating: 1518 | ||