Go Player Ratings

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Watanabe Koki

Watanabe Koki (渡辺貢規) has a rating of 1598, ranked 199 of 452 in professional play. Their highest rating so far is 1756 (October 31, 2019).

Watanabe Koki4 dan渡辺貢規Kansai Ki-in
Rating1598
Rank199
1-year change↓24
Peak rating1756
Last 1060-62
2026 record
1-3
Record since 1927
60-62(1 jigo)
Win rate
.492

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

Professional ratingsFind a player

Rating history — professional

4 gamesHigh 1634Low 1598
23 gamesHigh 1673Low 1598
37 gamesHigh 1729Low 1598
116 gamesHigh 1756Low 1475

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 9, 2026Kunisawa HirotoTengen Preliminary A　as White↓9
August 20, 2026Yuki SatoshiOza Preliminary B　as White↓8
March 19, 2026Asahi YujunKisei First Tournament Round 3　as White↓18
February 4, 2026Nakagawa TakumiKisei First Tournament Round 2　as White↑11
September 10, 2025Watanabe KandaiTengen Preliminary B　as Black↓12
July 31, 2025Kan MinuMeijin Preliminary A　as Black↓16
June 25, 2025Imamura ToshiyaMeijin Preliminary B　as White↑24
March 5, 2025Sato YutaJudan Preliminary B　as White↓16
February 27, 2025Nakao JungoKisei First Tournament Preliminary Round 2　Colors unknown↓18
January 23, 2025Honda MarikoKisei First Tournament Preliminary Round 1　Colors unknown↑3
November 20, 2024Kiyonari TetsuyaTengen Preliminary A　as White↓12
August 12, 2024Mutsuura YutaMeijin　Colors unknown↓3
June 12, 2024Kurahashi MasayukiMeijin Preliminary B　as Black↑17
May 8, 2024Tsuji ShigehitoJudan Preliminary A　as White↓10
March 20, 2024Fujita ReoMeijin Preliminary C　as Black↑9
February 28, 2024Imabun TaroKisei First Tournament Preliminary Quarterfinal　Colors unknown↓14
January 31, 2024Maeda RyoKisei First Tournament Preliminary Round 2　Colors unknown↑4
January 17, 2024Kiyonari TetsuyaKisei First Tournament Preliminary Round 1　Colors unknown↑20
December 7, 2023Mito ShuheiTeikei Cup Shun-ei Preliminary　as Black↓12
November 29, 2023Hoshikawa KoyoTengen Preliminary A　as Black↑12

Head-to-head

Up to 10 opponents, most-played first. Records are from Watanabe Koki'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
Mutsuura Yuta0-4.0000-20-1
Abe Yoshiki1-2.3331-10-0
Yata Naoki3-01.0001-01-0
Hon Akiyoshi0-3.0000-20-1
Yu Zhengqi0-3.0000-20-1
U Boi2-1.6671-01-1
Kiyonari Tetsuya2-1.6671-00-1
Seto Taiki0-3.0000-10-2
Nakano Yasuhiro0-2.0000-10-1
Imamura Toshiya1-1.5000-01-1

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
20261-3.250
20252-4.333
20244-4.500
20234-5.444
20222-4.333
20216-5.545
20201-4.200
20199-4.692
20183-5.375
201716-10.615
201610-8.556
20151-3.250
20141-2.333
20130-1(1 jigo).000
Total60-62(1 jigo).492

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