Printable Hard Sudoku

Set 1w1w1l3. 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
3 2 5 9
5 8 3 4 6
6 1 7
3 9 1
4 2 5 8
4 7
9 2 6
2 5 4
8 3
Hard #2
2 7
5 4 1 6 2 3
3 5 9
7 1 3
1 3 9 6 4
1 5 7 3
8 3 7 9
2 9
Hard #3
8 9 1
2 1
7 1 8 9 3 4
5 8
4 6
1 5 9
9 4 7 5 3
7 6
1 3 9 6
Hard #4
9 4
5 4
2 6 8 9
3 4 2
9 7 1
2 7 6 5
4 9 5 3
5 2 4 3 9
1 7
Hard #5
5 7 6
8 5 7 4
1 2 4 9
7 2 5 8
6 9
4 5 6 1 7
3 2
1 9
5 2 3
Hard #6
8 6 5
7 4
5 1 8
7 6 1 9
4 6 7
2 9 6
1 4 8
6 3 8 5 9 7
9 3
Hard #7
2 4
5 8 3 9 1
6 1 9 7 2
1 8 7
1 4 8 5
8 9 4 3
9 6 1
7 2 5
Hard #8
6 3 5 9
9 1 4 8
6 5
1 5
4 2 8 3
2 3 6 4
8 5
4 9 3
1 7 2 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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