Printable Hard Sudoku

Set bg29sd. 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
2
1 7 8
9 4 5 1 3 7
2 9 8 5
5 6 9 3 4
8 6 9
5 3 2
1 7 9
1
Hard #2
8 7 9 3
9
3 7
4 8 2 5
9 1
9 6 4
8 3 5 7 1 9
2 4 7 8
1 8 4
Hard #3
2 7
1 5 8 2
3
9 8 1
1 7 6 9 4
5 4
6
1 8 3 2 7 9
8 9 6 1 2
Hard #4
9 2 6
1 9 4 2
7 1 8 5 9
9 6
5 6 1
4 5 7 3
5 3 9
2 1 9
4 6
Hard #5
1 5 8
6 8 3 7
2 9
9 1 3 7
2 6 4 3
1 4
3 4 9 6 8
1 2 4
9 7
Hard #6
4 8 2 5
7 2 8 4
9 7 1 6
9 5 1 3
3 7
2 9 3 4
9 5
1 5 2
4 9
Hard #7
6 2 4
8 2 1 5
5 6 2
9 1 8 6
3 9 4
5 4 6 3
7 5 3 4
8 4 9
7
Hard #8
6
3 5 6
1 4 5 3 7
8 2
1
5 6 7 1 4
6 7 5
8 2 3 9
2 6 8 5 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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