Printable Hard Sudoku

Set 4ijhg2. 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
5 3 8
4 9 7
3 4 6
8 7 1
6 5 9
5 7
2 7 9 1 3
8 6 4
9 4 3 1
Hard #2
3 5 7
2 6 8 3
4 9 3
7 2 9 3
1 6 8
1 7 4 6 5
9 7
8 5 1
4 7
Hard #3
9 6 8 1 2
4 9
3 7
8 2 1
5 9 8 6 7
4 5 9 6
9 3 2
1 4
2 7 4
Hard #4
1 8 4
2 4 1 5 8
4
3
8 4 5 3 2
4 6 7 5
9 1 3 6
2 6 9 4
5 9
Hard #5
7 1
2 6
5 6 3 9 8 2
8 3 6 2
1 9 5 8
9 2
4 8 6 9
2 6
6 7 3
Hard #6
2 9
8 6 7 9 3
3 5 2 7
3
5 1 4 2
9 2 7
6 4 8 1 3 5
6
3 8 6
Hard #7
3 7 4 9 1
5 7 3
4 6 5
6 2 3 1
4 1
8 1 4 7
9 6 3 4
5 9 6
3
Hard #8
7 3 6 4 8
3 4 5 7
7 5
3 5 4 8
6 8 1
7 2 5 9
8 9 7 5
2
6 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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