Printable Hard Sudoku

Set 1t7iqvn. 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
9 6 5
9 3 2
6 7 2 4 3
8 5 3 1
1 9
2 8
6 1 4 3
8 7 9 5
9 6
Hard #2
6
9 6 5 1 7
3 2 6 9 5
3 2
6 4 1 7
5 8 6 2
4 6
7 3 5 4 1 9
Hard #3
9 6
2 8
4 1 7
1 2 7 8
7 2 9
9 5 6 1
7 1 3 2
3 6 2 5
8 7 6
Hard #4
4 8 3
1 4 7
6 9 1
4 9
6 2 9
3 2 1 7
8 3 9
2 9 3
7 1 5 6 8
Hard #5
7 9 1
9 5 4 8
2 3 9 6
6 9 7
5 6
1 7 5
5 7 6 4
6 2 3
7 9 8
Hard #6
7 6 1
4 8
4 3 7 9 2
7 6 1 2 9
4 5
8 4 3
3
6 5 2 1 7
2 5 8
Hard #7
9 6 8
7 3 4 5
8 5 1 6 9
1
9 8 5 6
2 7
1 4 7
2 9 4
6 8 1 9
Hard #8
2 4
7 9 1 6
1 6 2 7
8 6 5 9
2 9
6 4 2
8 4 3
5 3 9 8 6 1
4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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