Printable Hard Sudoku

Set 1xygx73. 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 8 4 7
2 9 6
4 1
7 1
9 7 6 2 1
4 7 3 2
1 7
3 2 4 8
4 1 5
Hard #2
7 3
7 4 6 5 1 9
8 4 6 5
1
8 7 9 5 3
8 3 5 4 2
4 9 1 6
2
6
Hard #3
9 6
8 7
2 3 8 6
9 3 7 1
1 2
6 4 5 8
3 4 9
4 9 2 6 8 5
6 2
Hard #4
6 9 3
3 6 7
6 9 8 5
7 3
2 1 9 7
5 2 1
6 3 4 7
8 3 1 4
9 2
Hard #5
6 8 9 7
2 7 5 1 4
5 2
1 4 6 3
7 8
3 9 1 2
5 3 2
9 8
2 1 8
Hard #6
1 4 8
9 8 6
6 5 3
2
3 7 5
6 1
3 9 8
3 4 1 5 2 7
7 9 4 2 3
Hard #7
5 6 1
7 9 3 4
3 9
2 7
5 1 6
1 8 7
4 9 7 3 8
2 3 9
6 1 9 5
Hard #8
9 8 1
1 2
4 9 6 3
3 4 9
2 5 1
9 7 6 8 3
9 8
8 4 7 1
5 8 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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