Questions tagged [reference-request]

For questions seeking references, e.g. to literature about puzzling or to a specific puzzle.

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Looking for a book or collection of specific type of puzzles

This is a reference request: my apologies in advance if it's not entirely appropriate for this SE. I recently came across this little puzzle: There are 20 apples in a basket on the floor. Around the ...
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Most objective online linkable sudoku grader?

A Sudoku's difficulty level is often the first thing readers notice about a puzzle. For questions and answers showing a puzzle it would be nice to have a relatively objective linkable tester. I've ...