Printable Hard Sudoku

Set 43hv63. 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 5
8 7 9 3
5 2 8 6
3 1 4
1 5 3 2
8 1
8 3 7
9 8 2 6
2 7 3
Hard #2
5 6 8
9 2 4
3 8 4 2
8 7 6 1
3 7 2
4 5
3 7 8
1 9 6
8 6 9 3
Hard #3
8 2 1 3
6 3 2 7
9 7 6 5
8 5 2 7 4 6
7
3 1
2 1
7 9 6
6 5 1
Hard #4
2 1 7 6
7 9 8
1 4 2 3
5 2 1
8 9 7
1 3 2 5
7
6 4 5 8
5 6 3
Hard #5
5 1
1 4 8
2 9 5
1 8 7 2 6
5 1
9 4
9 7 6 8 1 2 4
2 9
8 3 5
Hard #6
9 1 5
8 6 5 4
7 6
5 1 8 3
6 7 1 4
8 9 7
3 5 8
6 9 5
4 7 9
Hard #7
5 2 4 1 6 7
2 8
5 9
6 7 3 1
8
1 4 2 6
3 9 6 8
4 7 5 9
8 1
Hard #8
3 1 2
4 3 2 8
2 5
1 8 6 7
4
6 9 3 5
2 5 9 8
1 7 8 3
3 4 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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