Go Player Ratings

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Adachi Toshimasa

Adachi Toshimasa (安達利昌) has a rating of 1940, ranked 39 of 452 in professional play. Their highest rating so far is 2110 (September 25, 2023).

Adachi Toshimasa7 dan安達利昌Nihon Ki-in Tokyo
Rating1940
Rank39
1-year change↑8
Peak rating2110
Last 10332-210(1 by default)
2026 record
10-13
Record since 1927
332-210
Win rate
.613

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

Professional ratingsFind a player

Rating history — professional

30 gamesHigh 2016Low 1937
109 gamesHigh 2110Low 1919
172 gamesHigh 2110Low 1892
532 gamesHigh 2110Low 1469

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
August 20, 2026Fujisawa RinaGosei　Colors unknown↓16
August 10, 2026Sun ZheKisei League B1　as White↓13
July 30, 2026Shuto ShunSGW Cup Chuyo Preliminary Semifinal　Colors unknown↑13
July 30, 2026Kitano RyoSGW Cup Chuyo Preliminary Round 1　Colors unknown↑3
July 16, 2026Fujii KokiJudan Preliminary A Final　as White↓19
July 6, 2026Muramoto WataruKisei League B1　as Black↓18
June 29, 2026Kondo ToshikiHoninbo　Colors unknown↓27
June 21, 2026U BoiNHK Cup Round 1　as White↑14
June 18, 2026Miura TaroJudan Preliminary A　as Black↑20
June 15, 2026Hirata TomoyaKisei League B1　as White↓9
June 8, 2026Kono RinTengen Round 3　as White↓12
May 25, 2026Osawa NarumiHoninbo　Colors unknown↑1
May 18, 2026O RisseiKisei League B1　as White↑11
May 7, 2026Motoki KatsuyaOza Round 1　as Black↓7
April 30, 2026Ikemoto RyotaTengen Round 2　as Black↑9
April 23, 2026Murakawa DaisukeKisei League B1　as Black↓14
April 2, 2026Kono RinOza Final Preliminary Final　as White↑22
March 26, 2026Fukuoka KotaroKisei League B1　as Black↓7
February 26, 2026Sada AtsushiOza Final Preliminary　as Black↑17
February 19, 2026Hon AkiyoshiTengen Round 1　as White↑13

Head-to-head

Up to 10 opponents, most-played first. Records are from Adachi Toshimasa'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
Ichiriki Ryo2-12.1430-31-5
Motoki Katsuya4-6.4000-32-2
Terayama Rei7-3.7002-00-1
Kono Rin2-8.2000-22-4
Kyo Kagen2-7.2221-10-3
Fujita Akihiko5-4.5563-20-1
Suzuki Shinji5-3.6250-10-1
Yamashita Keigo2-6.2501-41-2
Hirata Tomoya2-6.2501-00-2
Akiyama Jiro4-3.5712-10-1
Shida Tatsuya1-6.1430-20-4
Anzai Nobuaki3-4.4290-12-0
So Yokoku4-3.5711-23-0
Ida Atsushi3-4.4292-21-1
Seki Kotaro5-1.8332-01-1
Yoda Norimoto4-2.6670-23-0
Tsuruyama Atsushi5-1.8332-11-0
Sada Atsushi4-2.6671-13-1
Uchida Shuhei3-3.5001-21-0
Rin Kanketsu2-4.3330-20-2
Ohashi Hirofumi4-2.6670-00-2
Seto Taiki4-2.6673-01-1
Rin Shien4-1.8000-01-1
Hon Akiyoshi3-2.6001-11-0
Fukuoka Kotaro3-2.6001-10-0
Kurotaki Masaki3-2.6000-00-1
Xie Yimin5-01.0001-00-0
O Meien2-3.4001-10-0
Yamada Kimio4-1.8000-03-1
Han Zenki1-4.2000-00-0
Shibano Toramaru0-5.0000-20-2
Kim Sujun5-01.0000-00-0
Cho Chikun3-2.6000-22-0

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
202610-13.435
202520-11.645
202416-18.471
202335-12.745
202214-15.483
202126-12.684
202018-18.500
201930-16.652
201835-11.761
201728-18.609
201629-16.644
201520-8.714
201415-9.625
20138-10.444
201214-12.538
201111-6.647
20102-4.333
20091-1.500
Total332-210.613

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