Printable Hard Sudoku

Set wlz5r5. 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 7 8
9 3 8
8 5 9 1
4 3 7 2 6
1 6 4
2 6 8
2 5 4
4 5
1 9 3
Hard #2
2 6 7 9
7 9 4 6
3 1 8
2 9
5 4 6 7
6 8
6 5 1 3
1 2 3 6
4 9
Hard #3
9 5 2
5
7 9 6
4 6 3
9 2 1 7
1 8 3
3 6 2
9 1 4 8
4 1 2 7 5
Hard #4
6 8 2 9 3
8 3 4
7 5 4 2
9 6 7
6 1 8
4 3
8 1
3 5 2 4 9
9 5
Hard #5
6 7 2
9 6 1
5 7 2 4
5 3 1
9 3 8 2
4 8
7 6 5 1
3 9 2
8 6 3
Hard #6
1 7
4 1 7
7 9 3
4 5 3
3 4 6 5
9 3 8 2
3 2 1 5 9
8 1
8 6 9
Hard #7
2 3 5 1 4
9 1 5
6 4 2
6 7
4 7 9 8
5 9 6 2
2 9 5
5 7 9
2 6
Hard #8
8 6 4
3 8
1 7
4 7 3 5
6 8 9 2
5 3
7 2 9
9 2 6 5 1 4
3 4 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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