Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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