Printable Hard Sudoku

Set 13i4ejf. 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
6 4 9 3 5 1
6 4 9 3
8 5
1 3 2
7 4 6
2 5
9 7 1 2
1 9 7
6 5
Hard #2
6 4 7
9 7 4 2 6 5
5 2 4
2 6
4 8 3 7 1
1 5 3
7 2
5 3 9
8 5
Hard #3
1 3 6 4 2
4 1
5 7
8 2 6 4 5
4 1 8 9 3
4 7 3 9
9 4 6 1
7 4
Hard #4
3 1
9 4 2
3 6 5
2 8 6 7
9 4 7 8
1 3 5
7 1
1 9 3 2
6 7 1 4
Hard #5
6 7 2
1
4 2 8 7
4 2 3
7 2 1 6
3 5 7 9
8 6
4 5 8 3
1 4 3 9
Hard #6
2 4 9
3 5 4
1 2 5
8 5 6
6 8 9 1
7 2 6
9 4 7 3
7 4
7 1 5 4
Hard #7
3 2 9 4
8
6 5
6 7 8
3 8 7 9
7 1 5 2
1 9 8 5
5 1 3 6
4 3 7
Hard #8
8 2 6
3 5 8 2
7 1
9 1 5
6 8
4 1 7 8 3
9 6 5
4 5 7
7 2 3 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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