Kaori Aoba (青葉 かおり, Aoba Kaori, born July 11, 1978) is a female professional 5 dan Go player. She is currently an affiliate of the Nihon Ki-in, the largest Go association of Japan, and was a student of Yasumasa Hane.[1]

Kaori Aoba
Full nameKaori Aoba
Kanji青葉 かおり
Born (1978-07-11) July 11, 1978 (age 44)
Japan Aichi Prefecture, Japan
ResidenceJapan Tokyo, Japan
TeacherHane Yasumasa
Rank5 dan
AffiliationNihon Ki-in

On 4 September 2008, Aoba was defeated by Crazy Stone, a Monte-Carlo Tree Search Go playing engine, in an 8-stone handicap game in Tokyo, Japan.[2] The exhibition match marks the earliest official defeat of a professional by a computer with a conventional handicap.[3]


  1. ^ "Kaori Aoba's profile". Nihon Ki-in. Retrieved 2010-02-08.
  2. ^ "SGF record of Aoba Kaori vs. Crazy Stone". Rémi Coulom. Retrieved 2010-02-08.
  3. ^ "Developer's page on Crazy Stone". Rémi Coulom. Retrieved 2010-02-08.