01 · Start with what you know
The dark numbers are fixed clues. Select an empty square and use the number buttons or your keyboard. Your entries appear in green. Matching numbers and related squares highlight to help you scan.
NUMBERS · A LITTLE CLARITY
Sudoku.
Clear your mind, one little square at a time.
A small, movable puzzle window. Keep this page open.
FILLED— / 81TIME0:00HINTS USED0
A little room to think.
Making a fresh puzzle…
Select a square, then type 1–9 · N for notes
Arrows to move · Delete to erase · Ctrl / ⌘ + Z to undo
LET THE PATTERN APPEAR
A little number know-how.
02 · Pencil in possibilities
Turn on Notes to add small candidate numbers to empty squares. Select the same number again to remove a note. Entering a full number clears matching notes from its row, column, and box. Undo restores entries and notes.
03 · A nudge when you need it
Check marks entries that differ from the solution without replacing them. Hint fills your selected editable square, or the next unresolved square. Hints are counted, even if you undo one. Duplicate entries are marked as conflicts.
04 · Make room for a break
The timer starts with your first entry or hint. Pause hides the board and stops the clock. Leaving the game window pauses a started puzzle. Mini mode preserves your puzzle; refresh starts a completely new one.
A few little answers.
How many puzzles are there?
This is a puzzle generator, not a small fixed collection. New puzzle creates a randomized complete grid, removes clues, and verifies that only one solution remains. Repeats are possible, but you can keep generating fresh combinations without downloading puzzle packs.
How are the difficulties different?
Easy targets 46 starting clues, Medium 38, Hard 31, and Expert 26. A puzzle may keep extra clues to preserve its unique solution. Difficulty is based on clue density rather than a formal rating of solving techniques, so individual puzzles can feel easier or harder within a setting.
Do I need an account or connection?
No account is needed. Generation and play happen locally after the page loads. Your entries are not uploaded or saved. Reloading starts a new Easy puzzle; reopening the page offline is not currently supported.