A new English translation of this book by Fukai Masaaki is is out now, published by Board N' Stones. This is a great book for those who like go problems. These are basically small unfinished 5x5 games where it is Black's move. It is amazing how complex these problems are in that they require attention to so many different aspects of Go, like sente, ko threats, captured stones, and more. These feel like go problems, but require a wider attention to more aspects of the game than straightforward life and death problems typically do. This is an impressive collection of Go puzzles that feel refreshingly new. I recommend this book to anyone who enjoys go problems!