Classic Sudoku is the timeless 9x9 puzzle you know and love. Fill every row, column, and 3x3 box with the digits 1–9 using pure logic. This mode keeps the rules simple while offering endless variety for beginners and experts alike.
Start a game instantly and refresh for unlimited new puzzles whenever you want. Use notes, hints, and the timer to match your solving style. If you want a different pace, try Easy for a relaxed session or Hard for a deeper challenge.