Sudoku has its deep roots in ancient number puzzles and in the mathematical concept of Latin Squares.It is a Japanese word: Su (meaning 'number') and Doku (meaning 'single') however Sudoku originated in Switzerland in the 18th Century and was introduced to Japan via America.
Sudoku is based on the logical placement of numbers. As an online game of logic, Sudoku doesn’t require any calculation nor special math skills; all that is needed are brains and concentration.
Playing Sudoku is an interesting experience and once you play, you feel compelled to play again, or to solve this hard puzzle you got stuck on. It's challenging and yet solvable. If you play Sudoku daily, you will soon start to see improvements in your concentration and overall brain power.