Printable Hard Sudoku

Set 1gijq94. 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 4
6 8
5 6 3 4
4 7 9 2 5
2 5 8
8 6 9
7 6 1 9 2 3
5 4 6
9
Hard #2
6 5 9
4 1 2 5
1 7
7
6 2 7 1
1 3 8 5 4
7 2 6 3
5 9
6 5 2 7
Hard #3
6 1
3 2
1 5 2 4 3
2 3 1 7
6 4 3 5 1
9 6 2
9
4 6 8 7
9 2 4
Hard #4
7 8 9 6
1 6 8 5 7
4 6
1 4 8 2
8 3 4
4 9 7
2 3 1
5 1
2 7 9
Hard #5
3 4 8 5
2 5
6 8 2
5 9 8 4 3
7 5 1 9
8 4 6
5 9 6
8 3 1
2 6
Hard #6
3 7 5
7 1 9 3 2
9
1 5
9 3 4 6
1 6 2
6 5 8
2 4 8 5 6
8 2 6
Hard #7
9 1 8 5
5 2 3
8 9
3 9 5 1 7
5 7 3 6
6 8 9
9 6 5
7 3
1 4 2
Hard #8
3 7
8 3 7 9
1 6 2 4
6
7 2
9 8 7 6 3
9 5 8 7 1
2 4 6
6 8 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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