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Play the demo for our classic Sudoku game! The demo includes one unique puzzle for three difficulties, while the full version has achievements, more music tracks, unlimited puzzles, and more difficulty levels. Win the game of Sudoku by correctly placing the numbers in all the squares on the grid. Enter numbers (1-9) so that each digit appears once in each horizontal row, vertical column, and 3 by 3 group. You won’t be penalized for mistakes. If you complete the puzzle incorrectly, just backtrack until the numbers are in the proper squares. Use the Notes feature to speculate or rule out potential options on any given square. The Clear or FIll Notes button hides or shows all note numbers in a particular square. Customize colors including dark mode. Try to solve the puzzle in the fastest time for each difficulty level!