Printable Hard Sudoku

Set 1g0wj1g. 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 7 6 3
7 1 5 4
3 1 8 7
4 2 7
6 9 5
9 7
7 4 6
1 6
6 9 3 8
Hard #2
5 9 1
7 5
2 9 8
7 6 5
8 7 2 9 4
4 3
5 6 4
1 2 9
6 3 2 7 1
Hard #3
1 8 2 6 7 9
4 7 2
5 1
9 7 5
1 6 8 4
7 3 8 2
2 4 5
9 2 7 1
Hard #4
7 2 5
1 4 2 5 6
6
9 3
3 1 2 4 5 6
6 8
3 1
1 8
2 5 8 4 1 9
Hard #5
7 9 6 5
5 3 7
3 8
2 4 1
6 7 1 3
7 3 2 9
4 6 7 5
8
5 6 3 4
Hard #6
6 8
7 1 4 5
6 2 1
5 8 3
8 7 9 2
4 1 5
9 4 5
2 9 3
5 3 2 7
Hard #7
5 6
5 1 7 9
1 9 5
5 2 4 7
9 7 8 4
4 2 9
8 3
3 6 7 1
1 5 2
Hard #8
4 7 6
5 3 8
8 5 4
6 9 2 3
1 5
4 6 9
9 6 3 2
4 5 1 3
7 6 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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