⭐ Medium · 32 given numbers · ID medium-21
Medium Sudoku No. 21
A medium puzzle with exactly one solution. Techniques needed: naked single, hidden single.
The sheet below is exactly what prints on one A4 or Letter page. Choose “Save as PDF” in the print dialog if you prefer a file.
Keyboard: arrow keys to move, 1–9 to fill, Backspace to erase, N to switch notes.
Solution (hidden until you want it)
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About this puzzle
Medium puzzles need at least one step beyond naked singles: hidden singles, pointing pairs, box/line reduction or naked pairs. Looking for a different challenge? Easy, Hard or Expert puzzles are on the printable Sudoku page.
Need a break from the numbers?
Try a medium riddle
Sudoku and riddles train the same muscle: spotting what must be true. Here are a few medium riddles with answers.