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A little time for your Sudoku.

My progress
Errors 0
00:00

Keyboard shortcuts

Enter a number
1–9
Move selection
↑ ↓ ← →
Undo
⌘ / Ctrl Z
Erase
Backspace / Delete
Notes
N
Hint
H
Pause / resume
P

You can also drag a number to any blank cell.

Medium difficulty

Settings

Colour theme

System follows your device’s light or dark appearance.

Remaining Candidates

Show how many of each number are left to place. Hide its button when all nine are on the board.

Fast Notes

Add Fast Notes to the Notes menu. Choose it while playing, or hold the pencil, to add the same note to several cells.

Note Conflict Check

Reject notes blocked by a number in the same row, column, or box, and highlight the numbers blocking them.

Medium Sudoku

Medium Sudoku strikes the sweet spot between accessible and challenging. With fewer starting clues than easy puzzles, you will need to think a few moves ahead and use techniques like scanning multiple rows and columns simultaneously. It is the most popular difficulty level among regular Sudoku players.

About Medium Sudoku

Medium difficulty Sudoku puzzles typically have 27-35 numbers pre-filled. At this level, basic scanning alone will not be enough. You will start using techniques like naked pairs, hidden singles, and cross-hatching to make progress. Medium puzzles train your pattern recognition and set the foundation for tackling hard and expert levels.

What techniques do I need for medium Sudoku?

Medium Sudoku requires you to go beyond basic scanning. You will need to use techniques like hidden singles (where a number can only go in one place within a row, column, or box), naked pairs (two cells in a unit that can only contain the same two numbers), and systematic cross-hatching across multiple boxes.

How is medium different from easy Sudoku?

Medium puzzles have fewer starting numbers, which means more empty cells to fill. The solving path is less obvious and may require you to consider multiple candidates for a cell before making a decision. You will often need to use pencil marks to track possibilities.

How long does a medium Sudoku take?

A medium Sudoku typically takes 10-25 minutes for intermediate players. Speed improves significantly with practice as your pattern recognition develops. Using pencil marks effectively is key to solving medium puzzles efficiently.