The word “Sudoku” is a Japanese word that means “single number” – so many people assume that Sudoku was invented in Japan. However, the truth about the invention of Sudoku is more complicated and more interesting.

In the early days of Sudoku, the game was played entirely with pen and paper, making for a leisurely experience. Sitting at the breakfast table, with a coffee in one hand and a pen in the other, Sudoku players would work through a puzzle slowly, enjoying every discovery. Oh, how the world has changed! Online Sudoku is as much about how quickly you can solve Sudoku puzzles as it is about enjoying the process of filling in the board.