Printable Hard Sudoku

Set 1j7pqsg. 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 5 2 1 6
8 6 3
1 9 2
1
4 8 2 9
1 9 2 5
9 3 4
3
6 1 7 9 8
Hard #2
2 9
9 4 6
5 9 1 7
3 4 2
9 4 7 3 1
6 8 9
9 1 3
4 7 5 2 9
8
Hard #3
7 8 6 5
9 2 8
6 5 7 4 3
9 8
7 5 9 2
3 8 9 7
1 4 6
7 2
4 5
Hard #4
5 4 9
7 3
9 3 1 2
9 1 6
6 2
7 2 8 4
8 5 3 4 1 6
9
1 6 5 3
Hard #5
1
1 7 2 3 4
3 8 2
1 4 7
2 8 6 9
6 2
5 6 3
7 9 1 5
3 9 6 7
Hard #6
3 2
7 5 1
1 9 2 4
3 8
6 7 5 2
8 1 9 6
1 5 2
4 3 9
9 7 1 4
Hard #7
4 6
1 3 5 2
7 4 6 2 3
7 9 4
2 9 3 7
4 7 8 5
6 8 7
6
8 1 9
Hard #8
7 9
6 1 8 9 3 4
1
3 8 6 5 1
9 2 5 7 3
1 5 8
3 6 8
5 8 6 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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