Printable Hard Sudoku

Set 1x5pvye. 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 8 4
4 7 9 8
7 6 5
5 2
2 5 4 6
8 7
9 6 3
4 5 6 9
2 4 8 5
Hard #2
3 5 8 6
9 7
5 3
8 9
3 9 6 4
4 3 9 2
7 4 6
9 6 8
4 1 8 9 2
Hard #3
7
6 9 4 7 5
9 6
8 5 2
2 7 6
8 1 9
7 2 5 1
9 5 4 2
2 7 6 4
Hard #4
9 6 8 3
7 4 3
8 7 4
4
3 2
3 5 7 6
6 5 9 7 2
3 6 5
7 8 1 9
Hard #5
9 6
9 3 5
3 5 4 6 1
8 9 1 6 7
5 7 8
7 4 8 3 9
9
1 8 5 7 2
Hard #6
3 5 4
8 9
7 9
3 6 4
6 2 8 7
5 1
1 2 9 7
2 4 6 5 7 8
1 8 2
Hard #7
2 5 8 6 9
2
1 4 8
3 5 8 2
7 5 2 4 3
5 9
8 3 4 1
5 7 3
9 7
Hard #8
8 4
5 1 6
5 2 7 9
1 9
3 2
5 9 7 1 6 8
1 8 3
5 3
4 9 8 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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