Printable Hard Sudoku

Set za77x2. 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
9 8 6 1
4 1 2
1 4 3 6
5 4 1
7 1 8 3
7
3 1 8
1 9 6 2
3 5 7
Hard #2
2 9 7 8
7 1
3 5 9
3 2 9 6
9 1 7 4 8 3
4 9 5 6 8
2 7
5 1 3
Hard #3
4 1 6
1 6 7
2 3 7 4
9
7 4 5 6
1 7 5
9 3 2 8
8 3 2
4 2 6 5
Hard #4
7 6
5 4 3
8 9 6 2 5
8 4
6 5 8 9 1
1 9 8
2 7 6 3 1 8
8
1 5
Hard #5
4 2
3 4 8 1
1 6 3 7
1 6 5
9 8 1
2 7 6 4
6 2 5
6 4 9
1 3 4
Hard #6
5 3 1
9 1
3 7 8 6 2 4
9 5 8 2
7
6 2 8
6 9 4 5 8 7 3
1
6 5
Hard #7
7 9 6 4
3 7 9
3 5
9 1 5 3
1 8 7
3 2
9 2 1
2 4 1 7
5 4 2 8
Hard #8
8 5 7
4 7
5 2 6
2 4 1 5
1 7 9 4
5 8 2
1 9 5
3 2
6 3 2 1 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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