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Puzzles

Types Guessing game Riddle Situation puzzle Logic puzzle Dissection puzzle Induction puzzle Logic grid puzzle Self-reference puzzle Mechanical puzzle Combination puzzle Construction puzzle Disentanglement puzzle Lock puzzle Folding puzzle Stick puzzle Picture puzzle Hidden object game Jigsaw puzzle Reveal the picture game Sliding puzzle Tiling puzzle Puzzle video game Tour puzzle Chess problem Logic maze Maze Transport puzzle Word puzzle Crossword puzzle Metapuzzle

Topics Brain teaser Dilemma Enigma Optical illusion Packing problem Paradox Problem solving Puzzlehunt Syllogism Thinking outside the box

Lists List of impossible puzzles List of maze video games List of Nikoli puzzle types List of puzzle topics List of puzzle video games

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A lock puzzle is a type of mechanical puzzle. It consists of a lock with unusual or hidden mechanics. Such locks are sometimes called trick locks, because opening them is like performing a magic trick. A matching key may or may not be used in this trick.

Lock puzzles have a long history.

Chinese jewelry boxes often contain trick locks and hidden drawers. An example of such a box is an integral part of the plot of the movie Shanghai Knights. Clive Barker's horror novella The Hellbound Heart (later adapted into a movie Hellraiser, followed by numerous original sequels) centered around Lemarchand's box which appears to be such a puzzle box but in fact opens the gates to Hell when manipulated.

Other lock puzzles stem from the necessity to invent secure locks in the Middle Ages.

Lock puzzles are closely related to puzzle boxes.

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