Printable Hard Sudoku

Set djx2wi. 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
3 6
1 7
6 1 7 9
9 5
2 5 6 8 1
1 2 9 7
1 4 6 7
5 3 4
8 6 5
Hard #2
4
2 9 8
1 5 9 3 6
1
2 5 3 8 1
6 8
1 8 6
6 7 3 5 4
3 5 1 2
Hard #3
8 9 7 3
3 2 5 9 4 6
1 2 3 5
8
3 6 4 8
7
5 6 9 2
9 7
7 8 2
Hard #4
9 2 6
7 9 3
3 6 9
1 3 8 6
2 4 5 7
7 4 1 6 5
5 8
4
7 1 9 3
Hard #5
8 6 7 1 5
3 1 6
5 3 8 2
3 2 4
9 1 3
3 4 9
1 7 6
6
9 4 7 8
Hard #6
9 5 8 7
3 9 1
2 8 5 1 4 3
5 2
4 7
7 1 6 8
9
7 8 4
4 8 6 1
Hard #7
9 5 6
3 1
8 2 7
9 5 8 2
4 8 9 3
3 1 9 4
5 9 8
7 4 1
2 6 7
Hard #8
8 7 1
4 1 9 2 3 6
2 4
1 4 9 8
3 1
9 5 6 4
7 6
3 4
5 2 9 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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