Sudoku Puzzle keep your logic skills sharp. The goal is to put the numbers 1-9 in each row, column and 3x3 box .Set the numbers with the mouse (left button to insert answer, right to use pencil/scratch marks).There are ten skill levels available based on the amount of missing numbers in a 3x3 box. Mystery: (3-6 missing per box) Random,1: (3 missing per box),2: (3-4 missing per box) Random,3: (3-5 missing per box) Random,4: (4 missing per box),5: (4-5 missing per box) Random,6: (5 missing per box),7: (4-6 missing per box) Random,8: (5-6 missing per box) Random, Nightmare: (6 missing per box). Saving and loading is supported. High scores are recorded on timed games and saved for replay. The manual setup allows for doing puzzles from outside sources (can be timed but no high score).Many printing options, Auto help and show solution features are disabled on timed games. Easily change the colors to your liking.