Thonky Sudoku requires JavaScript. Please make sure that JavaScript is enabled, then reload the page. Play a New Puzzle By ID Number Play puzzle number Go Play a New Puzzle By Difficulty Play random Random Difficulty Very Easy Easy Moderate Hard Very Hard Extremely Hard puzzle Go Puzzle string: New Game New Random Puzzle New Puzzle by Difficulty New Puzzle by Puzzle ID Number ⚙️ Update Notes Restart This Puzzle Check Your Progress Learn Sudoku Strategies If you are using Internet Explorer 8 or lower, or if you are using Android Browser 2 or lower, please upgrade to a newer web browser to play Thonky Sudoku.