Printable Hard Sudoku

Set 17svp60. 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
9 4 5 6
3 9 2
2 3 7 8
3 5
9 5 4 1
7 8
8 4 3 7
3 1 2
1 8 6
Hard #2
5 9 4 8
1 4
4 8 2 3
1 6 9
8 3 4
9 3 5 4
5 6 7
5 4 8
6 7 1
Hard #3
6
2 7 6
3 6 9 1
4 8 9
9 7 6 5 3
2 5
8 2 1 3 9
9 5 4 2
1 5
Hard #4
8 7 2
7 2 3 1 9
4 9 5
4 8 6 9
3 5 7
3 1
6 9 5
3 2
2 7 1 4
Hard #5
1 7 6
5 7 3
4 6 8 2
6 9 2
8 1
8 1 7 9
9 8 6 5
6 2 4
5 3 8
Hard #6
2 8 4
6
9 1 8
1 2
5 2 1 8 3
4 2 7 9 6 1
1
3 1 7 6
7 8 9 3
Hard #7
2 7 1
7 6 9 2
3 1 2
3 1
8 2
2 4 5 1
7 6 2 8 9
9 2
6 4 8 9
Hard #8
6 4 3 2
3 4 7 5
9 1 4 7
2
6 9 5 1
7 3 6 4 2
7 6 3 8
1
3 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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