Printable Hard Sudoku

Set 1syq3c6. 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 4
1 5 7 3 2
9 8 7 1
7 6 1 5
8 3 9
3 5 1
3 2
6 8 2 9
6 8
Hard #2
2 3
3 5 7 9 6
2 8 5
8 1 2
5 9
4 1 9 3 5
4 8 5
9 6 7 1
8 3
Hard #3
4 2
7 9 6 2 8
5 7 8 9 6
8 2 9 4
2 3 6
7 8 1 3
2 4 1
8 5 3
Hard #4
3 2
4 7 8 6
5 4 9 3
3 9 5 1 2
6 5
2 5 9 4 3
8 6
9 6 4
4 1
Hard #5
9 6 5
7 4 6
7 4 9 5 1
8 5 7
1 4
5 2
6 9 1 8
1 2 3
2 9 3 4
Hard #6
8 4 2
3 4 8
3 2
5 2 1 4
1 6 4 7
1 7 9
6
3 7 2
2 3 1 7 9 8
Hard #7
8 6 9 2 7
6 3
3 9 7
5 3 2
3 1 5
8 4 9 7
2 9 4 8
1
5 3 4 6
Hard #8
4 8 5
1 9 2 3
6 9
5 4 6 9
3 9 5
1 3
6
4 6 8 5 7 9
5 1 3 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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