Open-source Sudoku app designed for customization and ease of use with 6x6, 9x9, and 12x12 boards, four difficulties, extensive stats, history, and the ability to create, import, and save puzzles.
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Games Like Hard Sudoku Similar Puzzle Games like Hard Sudoku
Hard Sudoku is described as 'Hard-sudoku.com is a special puzzle game website for sudoku games with hard level, here you can play sudoku with hard level and record your time' and is a Puzzle Game in the games category. There are 1 games similar to Hard Sudoku for Android and F-Droid. The best Hard Sudoku alternative is LibreSudoku, which is both free and Open Source.