Sudoku Classic – Daily Brain Puzzle

Nine boxes, nine rows, nine columns, and a blank grid waiting for you to fill it with numbers 1 through 9. That's Sudoku Classic - no story, no timer pressure unless you want one, just you and a puzzle that only lets each number appear once per row, column, and 3x3 box.

Pick your difficulty and go: easy if you want something to do with your hands while your brain warms up, expert if you want to actually sweat over a grid. Stuck? Use the hint system instead of guessing and wrecking a good streak. Auto-save means you can walk away mid-puzzle and pick up exactly where you left off.

It runs straight in your browser on desktop, free, no download, so there's zero setup between you and your next puzzle. If you like games that reward patient logic over reflexes, this sits nicely alongside other Puzzle games on the site - solo, quiet, and entirely under your control.

Fill every row, column, and 3x3 box with the numbers 1 to 9, using each number only once per row, column, and box.

Click a cell and enter a number, working through the grid with logic and elimination rather than guessing. Difficulty ranges from easy to expert, and a hint system is there if you get stuck.

Start with the rows and columns that already have the most numbers filled in - they narrow your options fastest and make the harder empty boxes easier to crack later.