Go Player Ratings

JAAbout ratings

U Boi

U Boi (呉柏毅) has a rating of 1923, ranked 43 of 452 in professional play. Their highest rating so far is 1979 (May 28, 2025).

U Boi6 dan呉柏毅Kansai Ki-in
Rating1923
Rank43
1-year change↑13
Peak rating1979
Last 10162-141(1 by default)
2026 record
13-10
Record since 1927
162-141
Win rate
.535

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

Professional ratingsFind a player

Rating history — professional

29 gamesHigh 1959Low 1892
80 gamesHigh 1979Low 1847
133 gamesHigh 1979Low 1817
299 gamesHigh 1979Low 1516

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
September 3, 2026Fujita AkihikoMeijin Preliminary A Final　as White↓11
August 24, 2026I RyoKisei League B2　as White↑19
August 19, 2026Abe YoshikiGosei Preliminary A Semifinal　as White↑8
August 10, 2026Ito MasashiJudan Final Preliminary Round 1　Colors unknown↓22
August 3, 2026Shinoda YuyaHiroshima Aluminum Cup Wakagoi Preliminary Semifinal　Colors unknown↑3
August 3, 2026Tanaka KoyuHiroshima Aluminum Cup Wakagoi Preliminary Final　Colors unknown↓19
August 3, 2026Nakane DaikiHiroshima Aluminum Cup Wakagoi Preliminary Round 1　Colors unknown↑4
July 27, 2026Koyama KuyaKisei　as White↓14
July 15, 2026Omote YutoMeijin　Colors unknown↑12
June 24, 2026Takashima YugoKansai Ki-in First Place Tournament Round 3　as White↑8
June 21, 2026Adachi ToshimasaNHK Cup Round 1　as Black↓14
June 18, 2026Onishi RyuheiKisei League B2　as Black↓10
June 10, 2026Tanaka KoyuJudan Preliminary A Final　as White↑14
May 27, 2026Kurahashi MasayukiJudan Preliminary A　as White↑7
May 21, 2026Onishi KenyaKisei League B2　as Black↑14
April 8, 2026Hon AkiyoshiKisei League B2　as Black↑16
March 26, 2026Tanaka KentaroKansai Ki-in First Place Tournament Round 2　as Black↑7
March 19, 2026Furuya YutakaMeijin Preliminary B　as Black↑9
March 12, 2026Miura TaroKisei League B2　as White↓9
February 26, 2026Fujii KokiTengen Round 1　as Black↓18

Head-to-head

Up to 10 opponents, most-played first. Records are from U Boi'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
Sada Atsushi5-5.5002-22-1
Yuki Satoshi2-5.2861-11-4
Taniguchi Toru4-2.6674-10-1
Hirose Yuichi2-4.3331-21-1
Mimura Tomoyasu1-5.1670-21-1
Hon Akiyoshi1-5.1671-20-3
Onishi Ryuhei1-5.1671-30-1
Koike Yoshihiro2-4.3332-20-1
Ida Atsushi0-6.0000-20-3
Shibano Toramaru3-3.5002-10-1
Motoki Katsuya0-5.0000-30-2
Rin Kanketsu1-4.2000-31-1
Nishi Takenobu1-4.2001-10-2
Kiyonari Tetsuya1-4.2000-10-1

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
202613-10.565
202512-12.500
202416-12.571
202312-11.522
202215-12.556
202114-16.467
202014-14.500
20199-16.360
201812-11.522
201714-12.538
201621-7.750
20155-6.455
20145-2.714
Total162-141.535

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