Printable Hard Sudoku

Set 150z7ma. 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
5 6
9 4 3
1 6 7 2
2 9 8 7 4
3
4 2 9 8 6
8
6 4 2 3 7
7 9 8
Hard #2
2 7 6 8 9
8 5 7
3 4
2 6
8 9 3 6
4 2 8
3 4
1 6 9 7
6 7 5 1
Hard #3
1 7
9 8
4 5 1
9 4 6 8
8 3 2
3 6 9
7 1
2 6 1 4 9 5
8 7 5 6
Hard #4
7
9 8 5 1 2
6 3 9
4 9 5
1 6 9 2 8 5 7
7 2 1
7
5 4 3 6
2 5
Hard #5
6 2 8 7
8 7 9
2 4
8 5 1
7 9 8 3
1 6
7 8 5
7 6 4
5 9 2 3 7
Hard #6
8 2
1 4
7 3 2 9 8
3 6 8 4
5 8 9 1
4 7
2 3
9 3 7 2 8
4 1 5
Hard #7
8 7
1 7 6
2 1 3 5
3 6
2 6 8
4 2 7 3 1
1 4 6 9
4 8
5 7 4 3
Hard #8
2 6 4
4 9 3
5 7 1 3
1 3
9 8 1 3
7 5 1 4 8
6 1 5
1 9 2
2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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