# |
Black player |
Rank |
White player |
Rank |
Result |
# moves |
Date |
Event |
Round |
1 | | 7p | Oya Koichi | 7p | W+1 | 313 | 1992-03-08 | Shin'ei, 22nd | Semifinal - 2 | 2 | Abe Yoshiteru | 9p | Oya Koichi | 9p | W+R | 102 | 2003-01-20 | Ryusei Cup, 12th | Block A, Game 09 | 3 | Oya Koichi | 9p | Abe Yoshiteru | 9p | B+R | 219 | 2005-12-20 | Ryusei Cup, 15th | Block B, Game 08 | 4 | Oya Koichi | 6p | Aoki Shinichi | 6p | W+R | 140 | 1990-10-15 | Ryusei Cup, 01st | Block D, Game 08 | 5 | Oya Koichi | 5p | Aragaki Takeshi | 7p | B+R | 63 | 1986-08-10 | Shin'ei, 17th | Semifinal - 2 | 6 | Aragaki Takeshi | 9p | Oya Koichi | 9p | W+R | 172 | 2005-01-18 | Ryusei Cup, 14th | Block F, Game 09 | 7 | Oya Koichi | 9p | Chin Kaei | 9p | W+2.5 | 302 | 2002-04-21 | NHK Cup, 50th | 1 | 8 | Cho Chikun | 9p | Oya Koichi | 7p | B+R | 145 | 1992-11-12 | Gosei, 18th | 1/8 Final - 3 | 9 | Cho Chikun | 9p | Oya Koichi | 8p | B+R | 169 | 2001-03-08 | Honinbo, 56th | League, game 24 | 10 | Oya Koichi | 9p | Cho Chikun | 9p | W+4.5 | 284 | 2006-05-25 | World Oza Toyota & Denso Cup, 3rd | Last primary tournament | 11 | Oya Koichi | 9p | Cho Chikun | 9p | B+R | 167 | 2009-07-23 | Honinbo, 65th, last preliminary tournament | | 12 | Cho Sonjin | 6p | Oya Koichi | 7p | B+1.5 | 296 | 1992-02-29 | Shin'ei, 22nd | Final | 13 | Oya Koichi | 7p | Cho Sonjin | 7p | B+9 | 289 | 1992-10-15 | Gosei, 18th | 1-01 | 14 | Oya Koichi | 8p | Cho Sonjin | 9p | W+2.5 | 267 | 2000-09-18 | Agon Kiriyama Cup, 7th | Semifinal | 15 | Oya Koichi | 8p | Cho Sonjin | 9p | W+0.5 | 291 | 2000-10-19 | Honinbo, 56th | League, game 04 | 16 | Cho Sonjin | 9p | Oya Koichi | 9p | B+R | 145 | 2003-06-23 | Ryusei Cup, 12th | Quaterfinal - 3 | 17 | Cho Sonjin | 9p | Oya Koichi | 9p | B+R | 219 | 2005-01-18 | Ryusei Cup, 14th | Block F, Game 10 | 18 | Oya Koichi | 9p | Cho Sonjin | 9p | W+R | 174 | 2008-01-10 | Fujitsu Cup, 21st | Last primary tournament, Final | 19 | Oya Koichi | 8p | Cho U | 6p | W+R | 152 | 2000-11-09 | Honinbo, 56th | League, game 05 | 20 | Cho U | 9p | Oya Koichi | 9p | B+R | 145 | 2006-09-22 | Ryusei Cup, 15th | champion's decision tournament | 21 | Oya Koichi | 8p | Hane Naoki | 7p | B+R | 173 | 1999-04-29 | Oza, 47th | 1-05 | 22 | Hane Naoki | 8p | Oya Koichi | 8p | B+0.5 | 275 | 2001-02-08 | Honinbo, 56th | League, game 20 | 23 | Oya Koichi | 9p | Hashimoto Yujiro | 9p | B+3.5 | 263 | 2005-12-20 | Ryusei Cup, 15th | Block B, Game 07 | 24 | Oya Koichi | 5p | Hikosaka Naoto | 7p | B+R | 111 | 1986-11-30 | Oteai, 1986 | 14 | 25 | Hiroe Hiroyuki | 8p | Oya Koichi | 8p | B+1 | 321 | 1998-04-30 | Kisei, 23rd | Meidan, Final 8 dan | 26 | Hisajima Kunio | 9p | Oya Koichi | 8p | B+9 | 312 | 1997-02-17 | Ryusei Cup, 06th | Block C, Game 08 | 27 | Oya Koichi | 7p | Honda Kunihisa | 9p | B+R | 165 | 1991-09-26 | Judan, 30th | Losers' Section, 2-3 | 28 | Ichiriki Ryo | 3p | Oya Koichi | 9p | B+R | 157 | 2013-11-28 | Tengen, 40th, preliminary tournament A | | 29 | Imamura Yoshiaki | 7p | Oya Koichi | 7p | W+6.5 | 248 | 1991-11-25 | Ryusei Cup, 02nd | Block D, Game 09 | 30 | Ishida Yoshio | 9p | Oya Koichi | 6p | B+25 | 277 | | Games for Ishida's "Pro-Pro Handicap Go" book (Igo Club Series No. 12) | Game Seven: 4 stones | 31 | Oya Koichi | 5p | Ishida Yoshio | 9p | W+R | 136 | 1986-02-13 | Tengen, 11th | 1-02 | 32 | Ishida Yoshio | 9p | Oya Koichi | 9p | B+R | 175 | 2013-12-12 | | | 33 | Ishida Yoshio | 9p | Oya Koichi | 9p | W+R | 242 | 2016-10-20 | Tengen, 43rd, preliminary tournament A | Final | 34 | Ishigura Noboru | 8p | Oya Koichi | 8p | W+3 | 286 | 1997-07-24 | Oza, 46th | Preliminary Round 2 | 35 | Oya Koichi | 5p | Ishikura Noboru | 5p | W+2.5 | 286 | 1986-05-21 | Kisei, 11th | Final 5 dan | 36 | Iwata Hajime | 7p | Oya Koichi | 7p | B+R | 163 | 1991-12-16 | Ryusei Cup, 02nd | Block D, Game 10 | 37 | Oya Koichi | 8p | Iwata Tatsuaki | 9p | W+R | 232 | 1997-03-06 | Gosei, 22nd | 1/8 Final - 8 | 38 | Kamimura Haruo | 9p | Oya Koichi | 9p | B+R | 177 | 2004-03-02 | Ryusei Cup, 13th | Block F, Game 09 | 39 | Kataoka Satoshi | 9p | Oya Koichi | 7p | W+4.5 | 254 | 1994-01-27 | Gosei, 19th | 1-15 | 40 | Oya Koichi | 8p | Kataoka Satoshi | 9p | B+2.5 | 287 | 2000-07-13 | Honinbo, 56th | League Entrant Final 4 | 41 | Oya Koichi | 9p | Kataoka Satoshi | 9p | B+R | 171 | 2002-12-09 | Ryusei Cup, 12th | Block A, Game 08 | 42 | Kataoka Satoshi | 9p | Oya Koichi | 9p | B+9 | 262 | 2006-01-12 | Fujitsu Cup, 19th, last primary tounament | Japan Preliminary Final, Group 4, Round 2 | 43 | Oya Koichi | 8p | Kato Masao | 9p | W+R | 118 | 1995-12-18 | Fujitsu Cup, 09th | Japanese qualifier | 44 | Oya Koichi | 8p | Kato Masao | 9p | B+R | 205 | 1998-07-23 | Oza, 46th | Quaterfinal - 4 | 45 | Kato Masao | 9p | Oya Koichi | 8p | B+2.5 | 239 | 1999-07-01 | Oza, 47th | Quaterfinal - 3 | 46 | Oya Koichi | 9p | Kenmochi Jo | 7p | W+R | 140 | 2002-11-07 | Gosei, 28th | 1/16 Final - 06 | 47 | Kishimoto Kazuo | 9p | Oya Koichi | 7p | W+1.5 | 296 | 1994-11-10 | Gosei, 20th | 1-08 | 48 | Oya Koichi | 9p | Ko Iso | 7p | W+R | 224 | 2009-06-18 | Agon Cup, 16th | 1 | 49 | Ko Mosei | 6p | Oya Koichi | 5p | W+R | 116 | 1985-10-30 | Meijin, 11th | 1st or 2nd Preliminary | 50 | Oya Koichi | 6p | Kobayashi Koichi | 9p | W+R | 240 | 1991-11-07 | Judan, 30th | Losers' Section, 3-2 | 51 | Oya Koichi | 9p | Kobayashi Satoru | 9p | B+R | 153 | 2012-11-08 | Tengen, 39th. preliminary tournament A | Final | 52 | Kobayashi Satoru | 9p | Oya Koichi | 9p | W+R | 174 | 2015-10-08 | Tengen, 42nd, preliminary tournament A | | 53 | Oya Koichi | 8p | Kojima Takaho | 9p | B+R | 265 | 1997-01-16 | Gosei, 22nd | 1/16 Final - 11 | 54 | Komatsu Hideki | 8p | Oya Koichi | 7p | B+9.5 | 269 | 1993-10-02 | NEC Cup, 13th | Quaterfinal - 2 | 55 | Oya Koichi | 9p | Kono Rin | 6p | B+0.5 | 339 | 2003-05-26 | Ryusei Cup, 12th | 1/8 Final - 5 | 56 | Kono Rin | 9p | Oya Koichi | 9p | B+2.5 | 210 | 2010-05-13 | Judan, 49th, last preliminary tournament | Final | 57 | Kurahashi Masayuki | 8p | Oya Koichi | 8p | W+4.5 | 221 | 1998-01-01 | NHK Cup, 46th | 1-02 | 58 | Lee Changho | 9p | Oya Koichi | 9p | B+R | 167 | 2011-04-29 | LG Cup, 16th, integration preliminary tournament | | 59 | Oya Koichi | 8 dan | Lee Sedol | 1 dan | W+5.5 | 100 | 1997-11-20 | Japan-Korea New Stars Exchange, 4th | | 60 | Liang Weitang | 7p | Oya Koichi | ? pro | W+R | 214 | 1987-05-26 | China-Japan Go Exchange, 15th | Round 4 | 61 | Liao Guiyong | 7p | Oya Koichi | 6p | B+R | 149 | 1990-01-01 | China-Japan Go Exchange, 1990 | 5 | 62 | Liao Guiyong | 7p | Oya Koichi | ? pro | W+0.5 | 267 | 1990-04-29 | China-Japan match | | 63 | Mimura Tomoyasu | 7p | Oya Koichi | 7p | B+R | 149 | 1994-08-11 | Shinjin-O, 19th | Semifinal - 1 | 64 | Ming Zheng | 9p | Oya Koichi | 8p | W+R | 134 | 1996-12-16 | Ryusei Cup, 06th | Block C, Game 07 | 65 | Oya Koichi | 9p | Mizogami Tomochika | 8p | B+R | 197 | 2006-05-01 | Ryusei Cup, 15th | champion's decision tournament | 66 | Muramatsu Ryuichi | 7p | Oya Koichi | 8p | W+R | 164 | 1998-12-22 | Ryusei Cup, 08th | Block B, Game 12 | 67 | Oya Koichi | 6p | Nakamura Hidehito | 9p | B+R | 187 | 1988-04-26 | NHK Cup, 36th | 1 | 68 | Oya Koichi | 7p | Nakamura Hidehito | 9p | W+R | 184 | 1995-02-09 | Tengen, 21st | 1-02 | 69 | Oya Koichi | 7p | Nakano Hironari | 7p | W+R | 230 | 1993-12-13 | Ryusei Cup, 04th | Block D, Game 10 | 70 | Oya Koichi | 8p | Nakano Hironari | 8p | B+R | 225 | 1996-12-16 | Ryusei Cup, 06th | Block C, Game 06 | 71 | Oya Koichi | 7p | Nakaonoda Tomomi | 6p | W+R | 224 | 1992-11-02 | Ryusei Cup, 03rd | Block C, Game 08 | 72 | Nakaonoda Tomomi | 8p | Oya Koichi | 9p | W+R | 88 | 2004-01-27 | Ryusei Cup, 13th | Block F, Game 08 | 73 | Oya Koichi | 8p | O Meien | 9p | W+R | 158 | 1997-08-07 | Honinbo, 53rd | Qualifications, Group 4, Final game | 74 | O Meien | 9p | Oya Koichi | 9p | B+13.5 | 257 | 2008-12-18 | Gosei, 34th | Round 1 | 75 | O Meien | 9p | Oya Koichi | 9p | B+R | 155 | 2015-11-07 | | | 76 | O Rissei | 8p | Oya Koichi | 5p | B+R | 71 | 1986-07-24 | Shinjin-O, 11th | Semifinal - 2 | 77 | O Rissei | 9p | Oya Koichi | 7p | B+R | 207 | 1992-05-21 | Judan, 31st | 1/8 Final - 8 | 78 | O Rissei | 9p | Oya Koichi | 9p | B+5.5 | 263 | 2003-04-07 | Ryusei Cup, 12th | Block A, Game 11 | 79 | Oya Koichi | 9p | O Rissei | 9p | W+5.5 | 298 | 2003-12-01 | Gosei, 29th | 1/16 Final - 04 | 80 | Oba Jyunya | 2p | Oya Koichi | 9p | B+4,5 | 74 | 2004-06-10 | Honinbo, 60th | Final Preliminary, Group 2 Quarter-final | 81 | Oya Koichi | 9p | Ogaki Yusaku | 9p | B+0.5 | 273 | 2011-09-10 | Daiwa Cup, 07th | 1 | 82 | Ogata Masaki | 5p | Oya Koichi | 4p | B+0.5 | 297 | 1984-09-01 | Ryuen Cup, 8th | Final | 83 | Ohira Shuzo | 9p | Oya Koichi | 6p | B+R | 143 | 1988-01-21 | Oza, 36th | Qualification-3, game 5 | 84 | Otake Hideo | 9p | Oya Koichi | 8p | W+R | 144 | 2001-01-18 | Honinbo, 56th | League, game 16 | 85 | Oya Koichi | 9p | Otake Hideo | 9p | B+1.5 | 270 | 2003-01-20 | Ryusei Cup, 12th | Block A, Game 10 | 86 | Otake Hideo | 9p | Oya Koichi | 9p | B+R | 125 | 2008-09-04 | Tengen, 35th | preliminary tournament A | 87 | Oya Koichi | 9p | Otake Hideo | 9p | W+R | 170 | 2014-03-27 | Ryusei, 23rd | block-B | 88 | Oya Koichi | 9p | Oyama Kunio | 9p | B+1 | 239 | 1998-08-20 | Oza, 46th | Semifinal - 2 | 89 | Oya Koichi | 6p | Redmond, Michael | 6p | B+R | 133 | 1989-11-08 | Honinbo, 46th | | 90 | Redmond, Michael | 7p | Oya Koichi | 7p | W+R | 266 | 1991-09-19 | Gosei, 17th | Preliminaries | 91 | Oya Koichi | 6p | Rin Kaiho | 9p | W+4.5 | 267 | 1987-06-25 | Oza, 35th | Round 2-4 | 92 | Oya Koichi | 7p | Rin Kaiho | 9p | W+R | 158 | 1994-04-14 | Gosei, 19th | Quaterfinal - 1 | 93 | Rin Kaiho | 9p | Oya Koichi | 9p | W+R | 174 | 2009-09-03 | | | 94 | Oya Koichi | 7p | Ryu Shikun | 5p | B+R | 293 | 1993-03-13 | NEC Shun'ei, 08th | Final | 95 | Oya Koichi | 7p | Ryu Shikun | 5p | B+2.5 | 197 | 1993-04-29 | Shinjin-O, 18th | Quaterfinal - 1 | 96 | Oya Koichi | 9p | Ryu Shikun | 9p | B+4,5 | 277 | 2004-12-20 | Ryusei Cup, 14th | Block F, Game 08 | 97 | Ryu Shikun | 9p | Oya Koichi | 9p | B+R | 209 | 2008-12-11 | Ryusei, 18th | block-G | 98 | Sakai Hideyuki | 8p | Oya Koichi | 9p | B+1.5 | 107 | 2001-07-09 | Phoenix Cup, 2nd | Semifinal | 99 | Oya Koichi | 6p | Sakai Takeshi | 9p | W+R | 47 | 1989-01-09 | Fujitsu Cup, 02nd | Preliminaries | 100 | Sakata Eio | 9p | Oya Koichi | 7p | B+R | 191 | 1992-07-30 | Judan, 31st | Losers' Section, 1-1 |
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