Go Player Ratings

JAAbout ratings

O Yuinin

O Yuinin (王唯任) has a rating of 1355, ranked 378 of 452 in professional play. Their highest rating so far is 1453 (October 13, 2011).

O Yuinin5 dan王唯任Nihon Ki-in Tokyo
Rating1355
Rank378
1-year change↑91
Peak rating1453
Last 1083-179
2026 record
7-6
Record since 1927
83-179
Win rate
.317

The rating is calculated from published game results. It does not include any adjustment for playing Black.

Professional ratingsFind a player

Rating history — professional

14 gamesHigh 1369Low 1264
38 gamesHigh 1369Low 1204
59 gamesHigh 1369Low 1204
206 gamesHigh 1453Low 1204

The “All” view starts at 2006; earlier years are used only to warm up the calculation and are not shown.

Recent games

Up to 20 games, newest first. “Change” is the rating movement.
DateOpponent and tournamentResultChange
July 9, 2026Kanazawa HideoTengen　Colors unknown↓3
July 2, 2026Kurotaki MasanoriOza　Colors unknown↓7
May 28, 2026Yamada TakujiHoninbo　Colors unknown↓4
May 14, 2026Sakai MakiOza　Colors unknown↑24
May 7, 2026Tei MeikoTengen　Colors unknown↑3
April 16, 2026Hara SachikoHoninbo　Colors unknown↑9
April 9, 2026Mannami KanaTengen　Colors unknown↑22
April 6, 2026Hashimoto YujiroGosei　Colors unknown↓7
March 26, 2026Komatsu HidekiKisei First Tournament Preliminary Quarterfinal　Colors unknown↓3
March 9, 2026Mori ChisakiJudan　Colors unknown↓12
February 23, 2026Kin EnGosei　Colors unknown↑11
February 12, 2026Ito MasashiKisei First Tournament Preliminary Round 2　Colors unknown↑30
February 5, 2026Miyatani FugaJudan　Colors unknown↑28
December 18, 2025Koike YoshihiroMeijin　Colors unknown±0
July 28, 2025Kurotaki MasakiRyusei　Colors unknown↓4
July 10, 2025Takei TaishinOza　Colors unknown↓2
May 15, 2025Omori YasushiTengen　Colors unknown↓5
April 28, 2025I RyoJudan　Colors unknown↓1
April 14, 2025Fujii KokiGosei　Colors unknown↓1
April 10, 2025Nakajima MiekoJudan　Colors unknown↑19

Head-to-head

Up to 10 opponents, most-played first. Records are from O Yuinin's point of view; jigo and no-result games are not counted as wins or losses. Only games from 1927 onward are included.
OpponentTotalAs BlackAs White
So Kofuku3-2.6000-00-0
Matsubara Taisei0-4.0000-00-0
Sato Machiko4-01.0000-00-0
Hoshiai Shiho1-3.2500-00-0
Ko Reibun0-4.0000-00-0
Cho Chien0-3.0000-00-0
Seki Tatsuya0-3.0000-00-0
Tajiri Yuto0-3.0000-00-0
Tsuruyama Atsushi0-3.0000-00-0
Kaku Kyushin2-1.6670-00-0

Record by year

Counted by calendar year, January to December (default wins and losses are included; jigo and no-result games are not). Only games from 1927 onward are counted, so these totals do not match the career records published by the two Ki-in.

YearRecordWin rate
20267-6.538
20254-10.286
20242-7.222
20232-10.167
20220-8.000
20213-10.231
20201-6.143
20193-11.214
20186-15.286
20174-14.222
20164-7.364
20154-9.308
20142-4.333
20133-5.375
20125-8.385
20117-5.583
20101-1.500
20090-2.000
20081-1.500
20070-2.000
20061-5.167
20054-7.364
20043-10.231
20039-8.529
20025-7.417
19981-01.000
19971-1.500
Total83-179.317

Calculated from games played between 1927 and 2026 (as of September 17, 2026).