Blog specializing in grid-based deductive reasoning and logic puzzles
People who do puzzles score better on thinking tests, but that does not prove puzzles cause it. A plain-language look at what studies of crosswords, Sudoku and brain-training games do and do not show.
Read moreNot sure which logic puzzle to try? Answer two or three quick questions and get a suggestion from Hitori, Nurikabe, Norinori and Shikaku.
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Three shade-the-squares puzzles, three different ways of thinking. How they compare, and which one to start with depending on how you like to solve.
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Where the names come from and when each puzzle first appeared in print. All three are shade-the-squares puzzles from the Japanese publisher Nikoli.
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For these puzzles, having more than one solution is not allowed, because logic alone cannot choose between them. Here is how generators and checkers make sure there is only one.
Read moreThe same few habits work for Hitori, Nurikabe, Norinori and almost every pencil-and-paper logic puzzle: trust uniqueness, mark certainties, and never guess.
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