As reported by the folks at FreeAppADay, the last free iPhone app of the work week is Sudoku 2, an updated version of the classic Sudoku number / puzzle game that plays the same as you’d expect, but comes with some tweaks in the scoring system, among other areas.
For those unfamiliar with the concept of Sudoku, your object is to complete a partially filled grid which contains nine columns and nine rows. Those nine columns and rows are split into nine boxes of nine squares each (that is, each square is a 3×3 section of the grid). You’ll use the numbers 1-9 to fill in the holes, making sure that no column, row, or 3×3 box has the same number in it twice. To account for mis-taps, each game allows for three mistakes before you actually lose.
In Sudoku 2, your score is affected by a number of factors, including multiplying the number itself by a point multiplier that decreases over time, giving fast finishers the advantage, and by the amount of points each particular block or square in the grid is worth, also multiplied by the decreasing multiplier.
The game also tracks your “runs,” or amount of games won, and adds that figure to an online leaderboard. You’ll earn achievements and can track your high scores against other players thanks to OpenFeint integration.
To make sure you are receiving the ad-free version of Sudoku 2 today, you must download and run the game, not just download it to save it for later. That is, you must actually open and run (play) the game, even if just for a few seconds, in order to save yourself from receiving the advertisements that will appear in those games that aren’t opened until May 8 or later.