Are you addicted to Sudoku? Rubik’s Cube© ? Logic puzzles? Well, you are in luck, because — Sunday, January 29th, 2017 is National Puzzle Day!! Nothing is a difficult as it seems Nothing is as easy as it looks Puzzles always have one, several, or no solutions (Gianni A. Sarcone in the introduction to Impossible Folding PuzzlesContinue reading “January 29th is National Puzzle Day!!”