1)   SudoKoach 2.3
SudoKoach makes solving Sudoku puzzles more fun. It does the tedious work of figuring which numbers are possible in each unsolved cell, so you can get right to the more enjoyable aspects of solving the puzzle. Helps you learn solving strategies, too!
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 2)   Sudoku 9981 4.65
Sudoku puzzle game for Windows,with the color marking function and specific method to control candidate number,you can use the advanced techniques of sudoku more easily.
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