How to use Sudoku
Solve a fresh, uniquely solvable 9×9 Sudoku with keyboard-friendly notes, conflict checks, a timer, hints, and three difficulty levels. Choose a difficulty, select an empty square, and enter one digit. Notes mode stores several small candidates without committing an answer. The active result always remains visible in the workspace, and any provided Reset or New game control restores a documented starting state instead of quietly preserving an old outcome.
Mouse, touch, and keyboard-friendly controls are provided wherever the underlying action can be expressed without a complex gesture. Status changes are written as text as well as color or motion, so the next step is not hidden inside the visual board.
Rules and method
Each puzzle starts from a valid completed Latin-pattern Sudoku. Cells are removed one at a time only when a bounded solver confirms that exactly one solution remains. The game runs in the current browser tab, so ordinary play does not require a remote opponent, game account, or cloud session.
The page names its actual rule set instead of implying that every regional, tournament, classroom, or commercial version behaves identically. Visible counters, board state, selected controls, and completion messages make the result inspectable rather than treating animation as proof that an action succeeded.
Practical play and accessibility
Scan for rows, columns, or 3×3 boxes with one missing digit before guessing. Pencil notes are most useful when limited to genuine candidates. Restarting is useful when learning, and a lower difficulty or slower pace is a legitimate control choice rather than a lesser result.
Interactive targets use native buttons or labelled controls where possible. Drag, swipe, sound, timing, and motion never stand alone when a simpler control can perform the same job. The layout reflows for a narrow screen, visible focus remains available, and the site-wide reduced-motion preference limits decorative animation.
Privacy and limits
Generation proves uniqueness rather than grading human difficulty precisely. The stored unique solution drives hints and conflict feedback, while device speed can slightly affect generation time. These boundaries keep a casual entertainment page from making a medical, legal, financial, diagnostic, spiritual, or performance claim it cannot support.
Names, choices, moves, scores, drawings, and settings are processed locally and are not submitted to NexaCurrent by the tool. Reloading or closing the page normally clears the current session. No login, cloud save, leaderboard, advertising profile, or remote opponent is involved in ordinary play. If a result affects another person, a prize, safety, money, consent, or access, use an appropriate transparent process rather than treating a browser game as authority.