• Sudoku: The classic Sudoku game, availaible at 5 different difficulty levels every day
• Sudoku Mini: Bite-sized puzzles with a 6x6 grid, using the numbers 1-6 only
• Sudoku X: Same as Sudoku, but you have to solve the diagonals too!
• Kakuro: Works as crossword, but the givens are substituted with sums
• Sudoku Fusion: Combines the Sudoku grid with a Kakuro style sums puzzle (aka Killer Sudoku)

• Challenging and unique puzzles straight from the USA TODAY puzzle experts
• A 60 day archive of puzzles
• List and eliminate choices by putting multiple numbers in a cell, and rapidly switch between pen and pencil modes by pressing the same number twice.
• Convenience features like UNDO, REMOVE EXTRAS and SHOW ERRORS to make it easier for you to solve puzzles
• Hints and cheats to help you out when you are stumped!
• A puzzle timer to keep track of your solving time, and a high scores features to record your best times.
• Partially solved puzzles are automatically saved to resume later.

USER GUIDE

• Navigate the Main Menu options using the LEFT and RIGHT (or track wheel) controls. Choose to play one of 5 different number-based grid games or learn About USA TODAY Sudoku Fusion
• Navigate the sub menu options using the LEFT and RIGHT (or track wheel) controls. Choose daily puzzle to fetch current date puzzle or choose one of 30 puzzles in your current Archive,  view High Scores to see your best times or read Tips to learn the game.

Navigate across the screen (UP, DOWN, LEFT and RIGHT) using the track ball, track wheel or arrow keys on your phone.

A highlight box will indicate which empty square you are on. If you would like to temporarily store multiple values in a square, select the square and then press the different number keys. The square will immediately take on multiple values. Use '0' to clear the last value you entered, or use any one of the entered numbers to select that and discard the rest.

Pen and pencil modes help you keep track of entries that you are sure of and entries you are doubtful about. All entries first appear in 'pencil' mode. Typing the number again switches to 'pen' mode. You can type the same number again to switch back once again to 'pencil' mode.

When playing the game, you can press the track ball, track wheel or fire key, and get the menu options. You can select the various Hint and Solve options to aid you in solving the puzzles.

Show Errors help you to find out the cells with wrong values. Undo regains the previous operation that was done. Fill cells helps to display all the possible values that can be entered in a grid.

Sudoku:
Fill all empty squares so that the numbers 1 to 9 appear once in each row, column and 3x3 box.

Sudoku Mini: Fill all empty squares so that the numbers 1 to 6 appear once in each row, column and 3x2 section. 

Sudoku X:
Fill all empty squares so that the numbers 1 to 9 appear once in each row, column and 3x3 section. The diagonals also must include numbers 1 to 9.

Kakuro:
Insert numbers from 1-9 in to the empty cells to tally up to the sum listed in the triangles (across or down). Each number must appear only once in a sum, and just like a crossword there's a grid of filled blocks and clues to solve.

Sudoku Fusion:
Fill in the color matched squares with numbers 1-9 so that they add up  to the number clue appearing in the first empty color square. As you complete the sums, ensure each 3x3 section includes each number from 1 to 9 as in Sudoku. When all the sums add up and the sections are complete, the puzzle is solved. 

Key Assignments & Navigation Short Cuts

• Use the arrow keys/trackwheel on your phone to move across the puzzle (UP, DOWN, LEFT and RIGHT).
• Use the number keys on your phone to enter a number in the square.
• Press the "0" key to clear a number from a square.
• If your phone has a track wheel, then you can press the "ALT" key whlie moving the track wheel to navigate LEFT-RIGHT, while without the "ALT" key, the track wheel navigation is UP-DOWN.

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