Printable Hard Sudoku

Set 1t6hkvt. 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
2 3 1 4 5
1 7
5 6 1 7
3 1 4
7 1 3 8
3 9 7
6 8 3
1 4
8 6 2
Hard #2
3 1 2
1 7 5 8
9 4 3
2 3 1
4 8
9 6 7
7 1 8 9 2
6 9 5
3 2 4
Hard #3
6 8
3 8 2 4
5 4 3
2 4
9 8 5 1
8 1 9
1 6 2 5
7 2 1
5 4 6 1
Hard #4
1 7 8
7 9 4
5 6 4 3
2 8 1
3 6
8 5
4 6 2 3 1
1 3
1 8 7 5 9
Hard #5
3 5 2
4 6 8 2
4
8 9 2 1
2 6 8 5
3 6
7 2 3
4 1 9 7 2
1 7 8
Hard #6
7 5 2
7 8
1 2 9 5
9 2 1 4
8 7 9
5 7 6 3
3 1 9 7 4
5 3 8
3
Hard #7
7 4 5 3
9 3 1 6
1 9 8
5 6 1
8 4 9 2
7 8
1 3 2
8 4 7
9 6 4
Hard #8
9 6 4 1
2 4 8 5
5 3 8
5 2 1
6 3 9 1
3 6
1 3 5
5 6 1
1 8 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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