Printable Hard Sudoku

Set 1t859gq. 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
4 9 7 3
9
5 1
1 6 7 2
3 7 2 5
5 4 7
1 3 2 4
3 9
7 8 4 9 6
Hard #2
3 7 5 8
5 4 2 9
1 8 7
1 2
4 7
8 5 3 6
3 9 6 7
2 3
5 4 3 8
Hard #3
3 4 1
6 9 8
5 6 4
2 4 1 3
7 5 8 9
8 9 3 2
5 7 8 6
9 1 7
3
Hard #4
6 1 8
7 2 1
1 6 3
8 6
7 1 4 9 8
9 7 5
9 1 2 7 4
5 3 4
8 1
Hard #5
5 9 6
4 6 9 7
9 7
1 6 4 5 7
4 8 2
6 2 9 4
7 3 2
7 5
8 2 3
Hard #6
6 9 1 7
6 2
2 8 6
4 8 5
1 3 7
6 9 8
2 7 6 3 8
9 8 6 4
4 7
Hard #7
3 9 8 4
3 7 5
7 2
4 2 8
3 1 5
4 9 1
2 1 7 9
1 5
8 6 9 4 5
Hard #8
4 8 7
9 8
3 6 4 1 5
9 2
2 7 3 1
3 6 7 8 5
3 2 1
3 2 7
2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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