Yūsei Koga Explained

Yūsei Koga
Native Name:古賀悠聖
Born:January 1, 2001
Hometown:Fukuoka, Japan
Badge No:326
Teacher:Isao Nakata
Rank:6-dan
Teacher Rank:8-dan
Meijinclass:B2
Ryuoclass:6
Jsa:326

is a Japanese professional shogi player ranked 6-dan.

Early life and apprentice professional

Koga was born in Fukuoka, Japan on February 13, 1996.[1] He learned how to play shogi from his grandfather when he was about four years old.[2] [3]

Koga entered the Japan Shogi Association's apprentice school in September 2011 as a protegee of shogi professional Isao Nakata.[3] He was promoted to the rank of apprentice professional 3-dan in April 2017 and obtained full professional status and the rank of 4-dan after finishing third in the 67th 3-dan League (April 2020September 2020) with a record of 13 wins and 5 losses.[3] [4] [5] Although Koga's third place finish was not sufficient to earn him direct promotion to 4-dan, it was good enough to earn him a second promotion point which gave him the option to enter the professional ranks as a free class player. After consulting with his mentor Nakata, Koga decided he wanted to turn professional even if it meant starting in the Free Class.[3]

Shogi professional

In September 2021, Koga was promoted to Meijin Class C2 after defeating Hirotaka Kajiura 7-dan to reach the finals of the 52nd tournament. Koga's victory meant that he satisfied the criteria for promotion to Class C2 for the 80th Meijin League (April 2022March 2023).[6] [7]

Promotion history

The promotion history for Koga is as follows.[8]

Tsume Shogi Solving Competition

In March 2024, Koga won the 21st Tsume Shogi Solving Competition. He finished with a score of 73 points out of a possible 100 to win the competition for the first time. The tournament had been last held in 2019, but was cancelled from 2020 to 2023 due to the COVID-19 pandemic. Sōta Fujii 8-crown title holder, who won the competition the last five times it was held, did not participate in the competition.[9]

External links

Notes and References

  1. Web site: Kishi Dētabēsu: Koga Yūsei. ja:棋士データベース: 古賀悠聖. ja. Professional Shogi Player Database: Yūsei Koga. Japan Shogi Association. October 3, 2020.
  2. News: . Itō Takumi Toppu Tsūka, Tomita Seiya Shōdan Shōreikai Sandan Rīgu. ja:伊藤匠トップ通過, 冨田誠也昇段　奨励会三段リーグ. ja. Apprentice professional 3-dan League: Takumi Itō finishes first, but Seiya Tomita also promoted.. September 26, 2020. Nikkan Sports. October 3, 2020.
  3. Web site: Shin Yonden Tanjō no Oshirase. ja:新四段誕生のお知らせ. ja. New 4-dans announced. September 26, 2020. Japan Shogi Association. October 3, 2020.
  4. News: . Tomita, Koga ga Shin Shōgi Kishi Nishiyama wa Josei Hatsu Nogasu. ja:冨田, 古賀が将棋棋士に 西山は女性初逃す. ja. Tomita and Koga promoted to professional status; Nishiyama misses chance to become first female to become regular professional.. September 26, 2020. Tokyo Shimbun. Kyodo News. October 3, 2020.
  5. Web site: Dai Rokujūnanakai Shōreikai Sandan Rīgusen Nisennijūnen Shigatsu kara Nisennijūnen Kugatsu. ja:第67回奨励会三段リーグ戦 2020年4月～2020年9月. ja. 67th apprentice school 3-dan league: April 2020 to September 2020. 2020. Japan Shogi Association. October 3, 2020.
  6. News: . Koga Yūsei Yondan ga Kesshō Shinshutsu Hatashi Shīkyū Nikumi Shōkyū Furīkurasu kara Jūninme. ja:古賀悠聖四段が決勝進出果たしC級2組昇級 フリークラスから10人目. ja. Yūsei Koga promoted to Meijin Class C2 from the Free Class after advancing to finals; he is the 10th professional to be promoted from Free Class.. September 8, 2021. Nikkan Sports. October 4, 2021.
  7. Web site: . Koga Yūsei Yodan, Furīkurasu kara Shikyū Nikumi e Shōkyū. ja:古賀悠聖四段, フリークラスからC級2組へ昇級. ja. Yūsei Koga promoted to Class C2 from Free Class. September 8, 2021. Japan Shogi Association. October 4, 2021.
  8. Web site: Kishi Dētabēsu: Koga Yūsei Shōdan Rireki. ja:棋士データベース: 古賀悠聖 昇段履歴. ja. Professional Shogi Player Database: Yūsei Koga Promotion History. Japan Shogi Association. April 5, 2024.
  9. News: Maruyama. Susumu. Tsumeshōgi Kaitō Senshuken Koga Rokudan ga Hatsu Yūshō Gorenpa no Fujii Meijin wa Fusanka. subscription. ja:詰将棋解答選手権 古賀六段が初優勝 5連覇の藤井名人は不参加. ja. Tsume Shogi Solving Competition: Defending champion Sōta Fujii Meijin, who won the competition the last five times it has been held, decides not to participate. March 31, 2024. Mainichi Shimbun. https://web.archive.org/web/20240401023010/https://mainichi.jp/articles/20240331/k00/00m/040/187000c. April 1, 2024. May 2, 2024.

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