Printable Hard Sudoku

Set 1t8iq82. 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 9 7 3
3 6 1
7 9 2
4 5 3 7 2
9 2 3
3 8
6 5
4 3 9 6
1 7 4
Hard #2
4 8 3 5
9 4
7 5 3 2 6
1 5
5 7 9 8
8 2 6 3
2 9 8 1
1 7
6 9
Hard #3
4 8 6
9 7
6 2 3 5
5 2
2 6 8 9 3
3 8 6
3 4
9 1 5 2 3
6 7 8
Hard #4
4 3
3 9
7 5 9 6 4
1
2 1 4 6 8
3 8 2
3 9 6
4 2 7 9
9 7 8 5
Hard #5
6 8
9 7
7 2 3 9
7 1
1 4 9 6 3
8 9 2 3
7 4
3 5 6 2
3 1 7 6
Hard #6
1 9 6
5 6 4
6 9 4 1
3 6 2 8 9
6 2 7
8 6 5 3
2 1 7
9 7 2
4
Hard #7
9 1 2
3
4 5 2 9
9 6 5 2
1 8 2 5
9 8
2 1
1 4 3 6 9
8 6 5 7
Hard #8
7 3
5 8 4 7 1 9
2 8 5
4 5 7 1
9 3 1 4 2
1 6 3
8 7 4
8 9 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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