Sudoku is a classic number puzzle that challenges your logic and concentration. The goal is simple: fill every row, column, and 3×3 box with the numbers 1 through 9, with no repeats. Play free online at Skorven — no downloads, no sign-ups, just pure puzzle-solving.
Each Sudoku puzzle starts with some numbers already filled in (called "givens"). Your job is to figure out the remaining numbers using logic and deduction — never guessing.
Sudoku follows three simple rules. Every row must contain the numbers 1 through 9 exactly once. Every column must contain the numbers 1 through 9 exactly once. Every 3×3 box (there are nine of them) must contain the numbers 1 through 9 exactly once. When all cells are filled correctly, you've solved the puzzle.
Perfect for beginners or a quick warm-up. Most cells can be solved with simple scanning — looking for the only number that fits in a row, column, or box.
Requires more careful deduction. You'll need to scan across rows, columns, and boxes simultaneously and use pencil marks to track possibilities.
Advanced techniques come into play. You'll need to identify pairs, pointing sets, and box-line reduction to make progress.
The ultimate challenge. With very few givens, expert puzzles demand systematic elimination, deep chains of logic, and patience.
Every day, a new Sudoku puzzle is generated for all players. The daily puzzle uses Medium difficulty and gives everyone the same starting grid. Solve it, see your time and score, and compare with friends. A new daily puzzle appears at midnight local time.
Your score depends on difficulty, time, and accuracy. Harder puzzles award higher base scores. Solve quickly for a time bonus. Using hints or making errors reduces your score. Earn 1 to 3 stars per puzzle based on your final score.
Sudoku is completely free to play. Browse more puzzle games on Skorven or try our Loop Maze time-loop puzzle game.
