Genran

Genran (玄覧) is a famous Japanese ancient go manual by Akaboshi Intetsu consisting of 69 high-level problems. The first edition was published in 1833 containing 19 problems. The 1846 edition incorporated the 1833 edition and the 1835 edition of Shudan Gojuuzu (手談五十図 = 50 Diagrams of Hand Talk, contains 50 problems) by the same author.

SGF files of 62 of the 69 problems are available from Ulrich Goertz and on OGS.