Printable Hard Sudoku

Set 1jwuv0f. 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
2 8 4
4 9 2 6
9 3 7
2 4 5
8 7 4
5 3 1 2 8
9 4
5 9
9 7 2 3
Hard #2
1 8
4 7 6 3
6 3 8
2 7 5 6
9
5 8 7
4 3 1 7 9
2 9 3
3 1 2 4
Hard #3
4 2
7 5 6
9 1 7 3 5
2 1 9
8 6 1
6 7 3 9 4
7 9 5
8 3 9
8 9
Hard #4
6 3
9 7 3 5 4
3 6 8 2
4 9
5 2 7
7 9 8
5 9 7
1 2 9
6 2 7 1
Hard #5
2 5 8
7 5
1 6 8 7
8 3 2
7 4 8 2
5 2 8 6 9
2 9 6
9 7 4
3 1
Hard #6
8 9 6
3 9 8
6 7 1 3
6 4
1 3 2
4 2 7 5
7 9 2 5
7 1 2 9
2 9
Hard #7
1 2
4 8 6
7 9 8 5 2
1 2 5
2 3 9 6
5 1 7
3 8
7 4 9
1 9 3 7
Hard #8
1 6 7 8
5 2 1 4
8 4 2 9
9 8 5
9 4 7
2 8 6
3 4 6 1
7 9 3
3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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