Sudoku is a logical puzzle game featuring a 9x9 grid. Within the grid are 9 boxes each featuring 9 cells. The object is to fill in the numbers 1-9 in each row, column and box, but they must only appear in each one once.

Suitable for all players from beginners through to experts and six levels of difficulty, Astraware Sudoku is packed with features.

There are several ways to get puzzles: from the pre-built puzzle packs available at www.sudokuoftheday.com; by using the integrated Puzzle Builder which creates literally billions of puzzles; or download any of the Puzzles of the Day* over the air and then compare your times with other players worldwide. Players can also play puzzles from newspapers or books they've entered and get Astraware Sudoku's expert help and assistance to solve them.

Astraware Sudoku offers a range of different options to help players solve puzzles including manual or automatic pencilmarks in a choice of styles; a smart hints system; and the brand new hold and highlight system which can display an overlay for a specific number or pencilmark helping players to see where to look and what to look for. In touchscreen devices there's the added bonus of the notepad overlay, allowing players to make their own pencilmarks and notes on screen too.

Following requests from existing users, Astraware Sudoku also includes an extensive Puzzle Manager which allows players to select a specific puzzle to play, or delete puzzles they've already completed.

The game also offers a choice of control methods where players can move around and enter numbers using the 5-way, number keys, stylus and touchscreen, keyboard shortcuts, or any combination of these, so you can play it the way you want to.