Sudoku — Random Puzzle
Click “New Puzzle” to get a fresh board. Type 1–9 to play. We’ll flag conflicts. (Single‑file, no servers.)
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Difficulty
Easy
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Hard
New Puzzle
Check
Hint
Solve
Clear
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Filled: 0 / 81
Shortcuts: type 1–9, Backspace to clear. We highlight row/column/box conflicts. “Hint” fills one correct cell.
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Puzzles are generated on the fly by shuffling a valid base solution and removing clues while preserving a unique solution (backtracking check).