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Classic logic — knights, river, balance
Type pages for knights and knaves, river crossing, balance scales and syllogisms. Dedicated hosts are still sparse — try portals meanwhile.
How to play
4Knights and KnavesOn the island everyone tells only truth or only lies; you infer who is who from what they say. Raymond Smullyan turned it into an art.River crossingPeople and goods cross in batches; the boat holds few; some pairs cannot be left alone. At heart a state-space search.Balance puzzleOne ball differs in weight among identical-looking ones; find it in the fewest weighings. A classic entry to information theory.SyllogismGiven two premises, judge whether the conclusion necessarily follows. It trains what premises do and do not imply.
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