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A challenging large-print sudoku for experienced solvers — expect real pencil-work. Verified to have exactly one solution. This sheet is free and printed in large, senior-friendly type — use the Print button above for a paper copy, or choose “Save as PDF” in the print dialog. Prints as the puzzle only — tick the box below if you’d like the answer key included (it prints on its own page).

Sudoku — Hard #21

Instructions: Fill the grid so every row, column, and 3×3 box contains the numbers 1–9.

Level: hard
4
5
7
2
6
1
4
8
8
6
4
9
1
5
8
1
2
5
4
6
2
2
7
9
3
1
7
2

Answer Key

4
1
5
9
7
6
2
8
3
6
2
8
3
5
1
9
7
4
3
9
7
8
2
4
6
1
5
7
8
6
4
3
9
5
2
1
5
4
2
1
6
7
3
9
8
1
3
9
2
8
5
4
6
7
8
7
4
5
9
2
1
3
6
2
6
1
7
4
3
8
5
9
9
5
3
6
1
8
7
4
2

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