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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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This is a list of puzzles which have been proven impossible. An impossible puzzle is a puzzle that cannot be solved by following the directions or criteria for that puzzle.

• Mutilated chessboard problem
• Some variations of Fifteen puzzle
• Three-colouring the edges of the Petersen graph
• Seven Bridges of Königsberg
• Water, gas, and electricity
• Three cups problem

[edit] See also

• Impossible Puzzle
• -gry

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