SudokuClean99

Choose a difficulty and start a 9x9 puzzle. Tap a cell and enter a number 1 to 9 while ensuring each row, column, and 3x3 box contains every number once. Toggle Notes to pencil in candidates before committing to a final answer. Use conflict highlights and error checks to spot duplicates and fix mistakes early. Call a Hint when stuck, or use undo and redo to refine your reasoning path. Complete daily challenges and review statistics to improve speed, consistency, and accuracy.