Printable Hard Sudoku

Set wz3ipj. 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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