The object of Sudoku puzzles is to place the numerals 1 through 9 in a 9 x 9 grid so that each row, each column and each 3 x 3 grid contains each number one time only. You can take a look at the solutions to get the idea if you are new to Sudoku puzzles.
400 puzzles with 4 difficulty levels
Save incomplete puzzles
Check for incorrect numbers or check entire puzzle
Choice of background, number and highlight colors
Eight puzzles in the trial version; 400 in the full version
Free updates (more puzzles as they become available)
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