You may be a Sudoku fanatic and you are used to playing with the numbers, but now there is something else to contend with when you play this free online Sudoku game. Whereas other Sudoku games use numbers, this one uses letters; hence the name Wordoku. The letters represent the numbers 1 to 9. In the normal Sudoku, you are supposed to input the numbers 1 to 9 in a 3X3 grid without repeating the numbers. The grids are joined to make a bigger 9X9 grid. This larger grid should have the numbers 1 to 9 in the columns and rows but none should be repeated. This is a game that originated in Japan and has been a favorite amongst mathematicians for several decades; there are so many variants too. In this game, you are not going to use numbers, but you are going to use letters. This throws a spanner in the works. You have to substitute letters for numbers. A=1, B=2, C=3 and so forth until you get to I =9. This game will give many people a challenging time with most having to count the letters to ascertain their numerical value as far as this game is concerned. There is a timer that shows how much time you have spent before solving the puzzle. Definitely it will take more time as you try to figure out then numerical value of the letters; it just makes more fun and more exigent for you. This is a fantastic game that brings about a change that many people were not expecting. See if you can complete the puzzle in the same tie that you would have if it was using the numbers that you are used to. See how good you are at playing variants of Sudoku. This is a game that will change your perspective of Sudoku.