About Pure Logic

Pure Logic is a small blog about pencil-and-paper logic puzzles: the rules, the people who invented them, and the reasoning that cracks them without any guessing.

It is written alongside three iPhone games, Hitori, Nurikabe and Norinori, made by Struo (bystruo.com). Articles that mention them say so, and the promos are marked as promos.

This blog is the companion to the Pure Logic app site, where you will find all three games, their themes and their rules pages.

Every puzzle diagram on the site is generated and checked by program, so each one has exactly one solution.

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Questions, corrections or puzzle history to share? Write to contact@purelogic-blog.com.