Riddles

This is a collection of logical riddles. The solutions to these are meant to be purely logical; no special or clever "tricks" are required. The questions are self-contained and no additional knowledge is therefore needed (of course familiarity with logical thinking, as in mathematics or computer science, can be helpful).

The riddles

• Blue eyes
• Circular palace
• Cursed temple
• Devil's chessboard
• Greedy pirates
• Knight and knave
• Last man standing
• Prisoners and a light bulb
• Prisoners with hats
• Sphere and tetrahedron

Contribute

You are more than welcome to add new riddles to the collection. To avoid any ambiguities, make sure to write the questions in a clear and self-contained way. Also, make sure you follow the conventions:

• Use Markdown syntax with a limit of maximum 80 characters per line.
• Give the riddle a short and concise title
• Save the question as a filename with only one word in the format WORD.md. The solution should be saved as WORD_solution.md.
• Link to the solution file in the question file, and vice versa.

Please study the files for examples on how to follow these conventions correctly.