Logic puzzles inspired by the books of Raymond M. Smullyan.
Who is a knight and who is a knave? Adapted from puzzles by Raymond M. Smullyan, particularly those found in What is the Name of this Book?.
Are islanders nocturnal or diurnal? Are they awake or asleep? Inspired by puzzles from The Lady or the Tiger?.
With liars like the Lion and the Unicorn, how can Alice know what day it is? Inspired by puzzles from What is the Name of this Book?.
If you can see through the statements made by these unreliable guards, the treasure is yours! Based on similar puzzles by Raymond M. Smullyan.
Choose between two doors which may lead to treasure, or something less pleasant. Adapted from puzzles in Smullyan's The Lady or the Tiger?.
Who is lying, and which brother is which? Inspired by puzzles in Alice In Puzzleland.