Printable Hard Sudoku

Set 1q7od4w. 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 3 2 8 7 1
7 8 5
8 7 4 6
6 3
7 6 3 2
5 9 1
1 5
9 4
3 2 9
Hard #2
8 5
2 9
5 2 8 1
5 9
8 2 4 6
9 8 3 4
1 3 2 4 8
9 4
2 5 6 7
Hard #3
2
1 4 9 5
9 3 2 4
6 5 1
9 4 1 7 8
7 9 8 6
7 1 8 4
8 6 9 5
Hard #4
1 3 5
8 2 1 9 4
4 5 2 8 3
7 8 5 2
1 9 4
9 2 5
5 3
6 7 3 2
Hard #5
1 8 5 6
4 7
3 8 5
3 6 1 9
9 1
9
6 7 2 3
5 2 8 6 7 9
7 9 1
Hard #6
1 3 7 9 8
2 5
8
2 9 3 7
2 3 5 6
5 4 3
3 8
4 9
4 2 9 5 6 1
Hard #7
3 9 2 5
8 6 9 3 4
7 4 6 8 2
8 3
3
8 2 6 5
9 2 8
6
5 3 1 4
Hard #8
7 8 5 3
6 3 2 4
3 9 6 4
4 1 3
9 6
1 7 5
3 6 5
5 3 4 8
1 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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