Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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