List of Impossible Puzzles

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 K√∂nigsberg
  • Water, gas, and electricity
  • Three cups problem

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    Nothing puzzles me more than time and space; and yet nothing troubles me less, as I never think about them.
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