Printable Hard Sudoku

Set 1y6qasw. 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 6 7 1
9
8 1 7 6
2 7 4
9 6
4 8 3
8 1 5 4 9
1 5 3 7
3 8 2
Hard #2
3
6 7 5 2
9 2 6 3
3 4 9 8
5 6 8 1
6 1 4
2 4 1 8
9 5 2
2 9
Hard #3
4 6 1 7
1 3 8
7 9 6 1
8 6 1
3 6 5 7
6
7 1 9
3 4 2 8 7
1 3
Hard #4
5 8 9 2
9 3
2 6 8 4
8 1 4 7 9
2 4 1 5
9 6
6 8 7
4 3
5 1 6
Hard #5
9 3 2 4
1 4 8 5 9
6 1 7
4 7 5
6 3 4
3 2
9 4 7
9 1
8 7 5 2
Hard #6
7 2 6
6 1 9 5
1 5
7 5 6 4
3 1 9 8 2
4 8 1
4 8
6 5 9
5 8 3
Hard #7
2 5 3 9 6
6 2
3 5
1 4 8 2 7
7 3 4
9 8 7 3
4 6 8
5 8 3
4 1
Hard #8
7 5 4 6
9 3 8 1
7
8
3 2 5 4 8
1 9 5 3 7
9 5 8 6
1 8 3
2 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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