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Web app information and reviews.
A kind of logic puzzle very similar to Sudoku. Solve totaly free Kakuro Puzzles in three awesome styles.
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Free Cross Sum puzzle similar to Kakuro or Sudoku with the main difference that the empty fields are not known too.
Free web sudoku site unlike any other. Use smart hints to teach you new moves; save/share puzzles, undo screw-ups, print to PDF, enter your own puzzle, and more.
iPhonus Sudoku is logic-based number placement puzzle game.
A Sudoku players community in which you can share puzzles, meet players and play Sudoku online.