Printable Hard Sudoku

Set 1t596x8. 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 8 2
9 2 7 4 6
5 9 1
4 6 1 7
7 6 3
8 9 4
6 2 7 3
1
5 8 6
Hard #2
7 1
6 4 3
2 1 3 9 8
2 5 8 3
2 6
4 7
8 1 6 5 7
4 3 2 8 6
2
Hard #3
4 6 8
4 1 2
6 5 7
2 7 1 3 5
1 4 7 2
8 5
8 9 6
3 6 5
4 1 8
Hard #4
1
4 5 8
2 3 7 5 4
3 8 9
9 7 5 2
1 8 5
9 8 5 4 2 1
4 7
2 7
Hard #5
8 2 6
1 9 8 2
2 7 3
8
2 4 6
9 6 5
1 4 9 7 3 8
5
9 7 1 8 5
Hard #6
7 6 5
5 4 3
1 3 8 6
6 5 1 7
3 8 9 6
7 1
1
9 4 3 2
8 9 6 5
Hard #7
9 5 3
4 6 3 8 9
1 6
6 7 5 9 4 2
2 1 3 8
4 2
9 8
7
1 4 9 8
Hard #8
5 9
7 1 6
2 7 3 8 5
9 1 8
2 1 6 9
8 9 7
4 9
1 7 2
2 8 5 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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