Play Classic Sudoku Puzzle Online Free

About This Game

Classic Sudoku Puzzle is the nine-by-nine in its proper dress: clean grid, honest difficulty, and a clock if you want one. Fill every row, column and three-by-three box with the digits one through nine, using pure deduction — no guessing required, ever. The game accommodates the full range from novice to advanced player, with puzzles that scale from gentle singles-hunting to grids that demand pencil-mark discipline, and the time-limit option adds competitive pressure for players who like their logic with stakes. It is fully adapted for browser play on any device, phone included, which means your sudoku habit travels with you. A faithful, well-built daily workout for the deductive mind. Free online, no download.

How to Play

Fill the grid so every row, every column and every 3x3 box contains the digits 1 through 9 exactly once. Click or tap a cell to select it, then choose the number you want to place. Use logic alone — every proper sudoku is solvable without guessing. Work within the time limit if you want the pressure, and let the difficulty scale up as your technique sharpens.