Printable Challenge Sudoku
Brain Training — customize and download as PDF for free.
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Difficulty
Grid Size
Title
Show Title
Answer Key
Include Answer Key Page
Grid Color
Border Weight
0.6
Paper Size
Orientation
Page Margins
10 mm
Paper Color
Puzzle Seed
Challenge Sudoku — 9×9 expert
Printable Challenge Sudoku — Free PDF Download
Challenge sudoku puzzles represent the pinnacle of difficulty with the absolute minimum number of given clues. Only attempt these if you've mastered expert-level puzzles and crave an even greater mental challenge.
All sudoku types support A4, A5, A3, Letter, Legal, and Tabloid sizes in both portrait and landscape orientation. Customize colors and more. No account required — just customize and print.