Printable Hard Sudoku

Set gz7qco. 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 5 1 7
3 2 4
9 3
1 6 5 9
9 7 5
1 8
3 2 8
2 7 5 6 9 4
6 7
Hard #2
1 6 5
9 2 5 1
6 4 7 2
4 1 8 5
9 2
6 3 8 9
3 2 6 1 8
1 7
8
Hard #3
6 7 5
8 9
4 1
2 6 7 1 4
6 3 5
5 7 4 6 8
9 3
7 4 3 8 6
1 8
Hard #4
7 9 6 4 3
4 1 2
7 8 4
7 9 6 5
5 3 1 7
8 2
9 3
6 8 9
5 3 4
Hard #5
3 6
1 6 4 3 9
2 8 7
8 4 1
7 4 8
1 5 8 7
6
1 9 6 7
9 3 7 1
Hard #6
3 4
3 4 9
5 2 4 3
8 6 7
2 1 8 9 4
7 5
8 2
4 6 5 3 7 8
3 1
Hard #7
7 4
1 6 3
4 1 5 6 7
1
8 2 6 7 9 5
9 4 2
3 7 8 1
5 3 6
2 7
Hard #8
1 6 3 2
9 8
5 6 8 1 3
7 3 1 4 8
8 4
7 5 2
7 6 9 1
4 6
8 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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