Printable Hard Sudoku

Set g0bm60. 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
3 6 9 2 5
4 8 6
9 5 8 3
1 9
4 8 5 7 2 1
7
1 7
2 4 6
5 7 4
Hard #2
9 5 7 3
6 2
5 1
6 1
3 5 2 4 1
3 5 8 6
6 7
7 8 9
5 6 1 3 8
Hard #3
6 2 4
1 5 8 6
2 6
6 1 5
9 5
5 8 4 2 7 3
2 3
1 9 3
7 4 5 2
Hard #4
7 5 4
1 8
9 6
8 4 1 9
2 7
1 6 5 2 7
7
5 2 9 8 6
7 1 5 9 3
Hard #5
7 5
1
2 8 1
8 7 2 3 6 9
4 6
5 7 4 8
5 7 4
3 1 6 8
9 7 1 6
Hard #6
9 2 5 8
6 9
7 2
5 9 2
4 1 6
1 2 3
3 1 4
3 6 5 7
7 2 8 3 5
Hard #7
2
5 4 6 3
2 9 1 5
7 2 1 4 8
5 6
1 6 3
7 6 4 5 2
3 9 6 8
5
Hard #8
8 9 4
2 8 6 9 5
7 5
1 3 5
8 7 4 1 9
9 2 5
4 9 2 8
1
5 8 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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