Believe it or not, I’m a big fan of Sudoku, the Japanese numbers game which his also known under a few names such as sodoku, soduko, or sudoka. It took me almost six months to learn how to play Sudoku, but I finally managed to decipher its mysteries. The game consists of placing figures from 1 to 9 on a 9×9 squares board, in such a way that each figure is placed only once on each horizontal, vertical and smaller 3×3 square. Some figures are already given when you start the puzzle. Depending on these figures, there are more levels of difficulty for the Sudoku boards. If you are interested, I can teach you how to play Sudoku and solve even very hard puzzles.