Kurushima Kinai (久留島喜内?, d. 1757), also known as Kurushima Yoshita and Kurushima Yoshihiro (久留島喜内?), was a Japanese mathematician in the Edo period.
The Japanese board game of shogi attracted Kurushima's interest; and he was recognized in his own time as a master player. Among shogi players, he continues today to be well known for seven "puzzle ring" gambits with subsequent sequenced maneuvers -- including the "silver puzzle ring."
In his lifetime, he was recognized among the most prominent intellectuals. His mathematical gift was highly esteemed. Kurushima, like most of his contemporaries, was very interested in the mathematical problems involved in "magic squares."
Kurushima's published writings are few.
This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries.
* Kurushima kyokusū (久留島極数?) OCLC 033747221
* Sangaku, the custom of presenting mathematical problems, carved in wood tablets, to the public in shinto shrines
1. ^ 久留島喜内 -- Chiba University, Dept. of Mathematics and Infomatics
* Endō Toshisada (1896). History of mathematics in Japan (日本數學史史 , Dai Nihon sūgakush?). Tōkyō: _____. OCLC 122770600
* Shogi, Kuroshima's "Silver Puzzle Ring" gambit