Printable Hard Sudoku

Set 1xj23wn. 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
7 6 4
3 8 7 5
1 4 7 9
6 9 5 2
1 8 7 3
8 4 7
1 7 2
5 2 6
Hard #2
2 1 7
2 9
5 2 8
3 2 4 1 6
9 2 4
9 7 5
5 3
3 6 9
4 8 1 2 6
Hard #3
9 4 6
3 4 6 7 8
9
8 5
9 7 6
3 7 8
1 9 5
2 5 9
8 6 5 1 2 4
Hard #4
4 5
1 9 2 7 6 4
8
4 1 9 7
9 5 3 4 2
2 6
7
2 3 5
4 9 2 8 1
Hard #5
3 7 6
6 1 2 9 3
8 9 2 6
9 4
5 3 7
1 5 6
3 9
4 6 2
9 2 8 4
Hard #6
1 8 3 4 5
2 8 7
8
7 5 2 8
9 7
5 3 6 4
5 2 4 1 9
2 4 7
1 6
Hard #7
3 2
8 5 2 7 9
6 8 9 5
2 4
5 6 4 8
7 6
1 6 4
3 4
2 7 3 5 9
Hard #8
7 6 5
8 9
3 8 4 9 2
9 7 6
1 3 4 2
5 2 7
2 4
5 8 4 6
7 5 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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