It’s 9 Columns, Rows, and Boxes – You Know What to Do!

We’ve got the completely stripped-down experience for any of those nostalgic sudoku players out there with this simple and addictive Sudoku Classic online game. It’s black and white, free, and guaranteed to keep your brain working. Never played before? Here’s how it works: you need to fill in every row, column, and 9 x 9 box in this game with the numbers 1-9, never repeating a number. The harder the puzzle, the fewer numbers you start with. Got it?

Sudoku Classic Is Boredom’s Worst Enemy

If there’s another unblocked game you can play for hours and hours without getting bored, we don’t know it. This epic game is like a new version every time you play, since each puzzle presents you with different starting numbers. If you want, you can ignore the timer and just relax, but if you’re competitive, try to beat our record of 6 minutes. It’s Sudoku Classic time, numbers whiz!