Infinite Sudoku - Extreme Edition (PC CD)

An unlimited supply of tear-your-hair-out Sudoku Puzzles. Play classic 9 x 9 Hard and Super-Difficult puzzles. Attempt Sudoku 12 x 12, Sudoku 16 x 16 or Killer Sudoku. Print any puzzle--with or without the solution. Insert pencil marks manually or automatically. Refer to the tutorial and handy hints and tips. Highlight wrongly entered numbers. Beat the clock and record your high scores. Quickly undo multiple mistakes. Save partially completed puzzles, Platforms: Windows XP