Printable Hard Sudoku

Set 4bkq9y. 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 5 9
1 3 7 4
2 5 8
2 3 4
3 6 2 9
4 7
1 9
5 4 7 3
8 4 6
Hard #2
7 6
8 9 5
1 3 2
1 3 9 6 4
2 7 5 8 3
5 2
3 8 9
6 4
2 7 5 3
Hard #3
9 2 6 4
7 6 2
2
3 4 1 2 5
2 5 3
8 1 5 2 9
5 1 7 6
5 8 4
4
Hard #4
2 1 4 7
6 9
4 1 8
6 2 5 8
3 9 6 4
9 3 7 2
5
9 8 7 1
2 1 6
Hard #5
2 4
2 9 7 8
7 5 6
7 8 6
5 6 4 2 1
9 6 3 7 8
2 4 1 9
3 5 2
Hard #6
5 3 9 6
8 2 7 5 3
5 1
9 6 2
7 2 9 3 1
5
6 8 9 7
4 9 8 5
6
Hard #7
8 7 1 3 9
9 8 2 1
3 4 2
2 9
8 9 7 6
1 3
4 3 2 7
1 5
9 8 1
Hard #8
1 8 5
3 1 7 8
2 9 1
4 2 9 6
2 6 1 4
4 1 7
8 3 2
2 8
3 5 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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