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Slide numbered tiles to combine and reach 2048! Features touch/swipe support, undo functionality, and score tracking
Code-breaking puzzle game. Guess the secret color code with feedback pegs. Three difficulty levels
Classic minesweeper with right-click flagging, timer, first-click safety. Beginner, Intermediate, Expert modes
Place the numbers 1 through 9 so that every row, column, and 3×3 box contains each digit exactly once. Sudoku is pure logic — no math required, no guessing needed. From gentle warm-up puzzles to fiendishly difficult grids, there is always a challenge waiting.
Solving Sudoku relies on scanning for forced placements, using elimination within rows, columns, and boxes, and applying techniques like naked pairs and hidden singles as puzzles get harder. The satisfaction of completing a tough grid through pure reasoning is unmatched. Multiple difficulty levels ensure both beginners and experts find puzzles that stretch their skills.
A daily Sudoku puzzle keeps logical thinking skills sharp and provides a satisfying routine.
The deep concentration required makes Sudoku an effective way to practice sustained focus.
Works offline after loading — perfect for flights or commutes.
Sudoku teaches deduction and elimination in an accessible, non-intimidating format.
Not at all. Sudoku is about placement logic, not arithmetic. You could use letters or symbols instead of numbers.
No. Every well-constructed Sudoku puzzle is solvable through logic alone.
Error highlighting will flag conflicting numbers so you can correct them. You can also undo moves.
Easy puzzles can be done in 5-10 minutes. Expert-level grids might take 30 minutes or more.
All processing happens directly in your browser. Your files never leave your device and are never uploaded to any server.