5 Hardest Puzzles in the World | Logic Puzzles and Riddles | Gemr

Melt your brain with the hardest puzzles in the world.

XKCD’s “Blue Eyes.”

Arto Inkala’s Sudoku puzzle

“The Challenge” in The Witness

“1000 Colors” Jigsaw Puzzle

George Bolos’ “Hardest Logic Puzzle Ever”