Printable Hard Sudoku

Set 1w7dxyz. 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 4 5
3 2 8
5
6 7 1 3
8 4 9 6 1
1 6 2
6 2
4 5 7
7 2 1 3 8
Hard #2
3 7 4
5 4 1
9 8 3
4 7 3 2 9
5 1 6
3 8
1
1 9 8 2
4 1 7 9 6
Hard #3
9 8
1 2 3 7
6 9
7 3 6 8 1 2
2 3 7
9 5 8
5 1 6 4
5 7
2 7 6
Hard #4
4 1 6 2
9 7
1 5 4 8 9
6 5 7 4
9 5 4
2
1 9 5 7
7 2 3 9
8 1
Hard #5
6 7
8 5 1
2 1 3 5
4
4 1 8 9
3 7 4 2 1
6 9 7
7 5 8 9
2 3 4
Hard #6
9 4 7 8
7 2 4
6 5 7 2
9 1 6
2 7 3
5
5 2 4
7 8 1 5 2 3
3 8
Hard #7
9 3 7 6 8
3 7 1 5
8 5
7 2 5
3 5 9
9 8 7
6 1
4 7 9
2 4 9 1
Hard #8
8 5 3
5 9 6
3 1 2 8
7 9
6 4 8
8 9 7 1 3
3 8 4
2 6
4 8 6 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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