As an academic discipline, logic is the study of reasoning. Logic puzzles, therefore, involve making a series of inferences ...

The twentieth-century philosopher Ludwig Wittgenstein once wrote that: “Logic takes care of itself; all we have to do is to look and see how it does it.” These words bring out the crux of the problem ...

When counting squares in a grid, don’t stop at the smallest boxes; the bigger ones are hiding too. The rule is simple: In an n × n grid—where n is the number of squares both horizontally and ...

Nonograms (you may recognise them by the Nintendo trademark "Picross") are relatively recent to the puzzle world, first appearing in Japanese puzzle magazines in the late 1980s. Nintendo quickly ...

When Slate asked me to write about “sudoku”—the number puzzle that’s taken Britain by storm (and seems poised to conquer the United States, too)—I thought it might be a pleasant little assignment.