100 Challenging Go Problems for 100 Days of Study

Yutopian book. Consists of 100 problems from Kido magazine's "Challenge corner". It is presented as a test of playing strength, where problems can have a difficulty level ranging from amateur shodan to pro.

Each problem features a "success rate" by the respondents to the magazine's challenge at the time of publication. The hints in the book were not offered in the original challenge.

Reviews

David Carlton's review (with Tom Rose’s comments)

Summary (by PJT): Impossible for an AGA 2 kyu and a BGA 4 kyu, also for various players up to 3 dan, but probably good if you are good enough!

Dieter: reviewing this book with KataGo in 2024. At first sight, the opening problem solutions are not endorsed.

Ulrich: this is a reprint of a special edition of Nihon-Kiin from 1981, where monthly problems of the magazin "Kido" are collected. The below mentioned examples have a "win rate = right answer" of 12%, 18% and 13%.

Table of Contents

• The opening - 13 problems
• The middle game- 18 problems
• "Perception" which seems to be the book's choice of translating tesuji - 7 problems
• Sabaki - 16 problems
• Reading - 16 problems
• Semeai- 7 problems
• Life and death - 17 problems
• The endgame - 6 problems

Sample Material

Here's a problem from each category, checked with KataGo

• /Problem 1 - Opening
• /Problem 14 - Middle game
• /Problem 32 - Tesuji