This game is the same as sudoku, except that the small groups are in an irregular shape. The object of this game is to fill in all the squares with numbers 1 to 9, the numbers in a row or a column must not repeat, and also the numbers in a group must not repeat. The faster you finish the game, the higher your score. When you are stuck, you can use the hints, but you will be penalized.
How to play sudoku games:
There is really only one rule to Sudoku: Fill in the game board so that the numbers 1 through 9 occur exactly once in each row, column, and 3x3 box. The numbers can appear in any order and diagonals are not considered. Your initial game board will consist of several numbers that are already placed. Those numbers cannot be changed. Your goal is to fill in the empty squares following the simple rule above.