Printable Hard Sudoku

Set 1iy0muf. 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 9
4 7 3
8 9 4 1
6 4 8 2
9 5 7 2 8
4 3 6 1
1 6
1 8
6 9 2
Hard #2
4 2
7 9 5 2 3 4
4 8
3 4 1
8 4
9 3 1 7
4 7 5 6
5 6 1 9
1 3
Hard #3
2 7 8 5
5 1
2 9 8
6 3
2
4 6 1 5
3 6 4 1
9 5 4 3 7
2 9 7 3
Hard #4
4 7
6 1 7
7 5 6 1 9 3
2 4
5 8 3 1
6 1 7 8 2
9
9 2 5
8 4 9
Hard #5
6 8 2 1
8 2 3
1 6 9 8
3
6 5
4 5 3 7
1 8 5
1 5 7 9 6
5 9 1
Hard #6
8 6
2 9 4 5
9
7 2 8
8 1 5 3 9
1 7 9 3
6 1 4 3
7 3 4
8 7 6
Hard #7
7 6 8
5 7 2 6
6 2 8
3 5 2 9
9 2 1 4
8
8 5 1 6 2
1
2 1 4 7
Hard #8
1 2 3
9 5 7 6
1 3 5 9 8
5 2 8 1
2 4
2 6 8
1 8 9 3
8 3 4 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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