List of impossible puzzles

This is a list of puzzles which have been proven impossible to solve. An impossible puzzle is one that cannot be solved by following its directions or criteria.

• 15 puzzle for half of the starting positions
• Five room puzzle
• MU puzzle
• Mutilated chessboard problem
• Coloring the edges of the Petersen graph with three colors
• Seven Bridges of Königsberg
• Three cups problem
• Water, gas, and electricity

See also

• Impossible Puzzle
• -gry