Printable Hard Sudoku

Set 1t7ebts. 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
5 7
8 1 7 9 5
3 7 5 1 4
5 4 6
7 3 1 2
4 8
1 2 7 3
6 3 5 9
Hard #2
1 8 5
6 5 4
5 7 1 9
6 2
8 7 1 9 2 6
4 7 8
1 2
3 1
9 7 4 3
Hard #3
8 6 1
8 9 4 5
4 2 7
2 4
8 9 3 2
5 1
5 2 4 9
7 5 3 8
4 1 9
Hard #4
9 2 3
7 6 5
2 9 8
2 1 3 4
4 2 6
9 8
9 3 8 5 6 7 4
5
3 4 7
Hard #5
7 4 9 1
9 1 5
3 6
5 7 2
4 6 9 2 5
3 1
4 7 9
9 6 7
1 7 3 8
Hard #6
5 7 9
2 3 4
8 5
7 9
8 4 1
3 2 9 1 6
8 4 7 6 5
1 6 7
6 9 3
Hard #7
8 7 3
4 9 8 7 6
7
3 1 8
4 6 5 2
1 2 8
1 2 6 4 7
5 8 4 9 3
Hard #8
8 7
4 9 5
3 6
7 8 2
4 5 8 6
2 3 1 7 8
7 6 4 1
2 5 9
1 8 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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