困難 Sudoku 2012 to print (free PDF)
Download every 困難 Sudoku from 2012 — 366 puzzles — as a free printable PDF.
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4
6
3
2
8
2
8
5
4
1
3
9
9
5
7
8
8
3
6
5
9
8
3
6
4
9
1
2
3
7
9
6
8
8
4
6
8
6
4
1
2
7
9
3
5
7
4
1
1
4
9
9
6
3
5
2
2
4
6
3
4
7
5
8
8
7
1
3
9
8
7
7
5
2
8
5
9
3
4
9
1
9
5
6
2
3
1
5
7
3
6
4
9
7
8
1
5
1
4
5
1
6
4
9
7
3
2
8
6
2
3
4
5
1
9
6
4
3
5
8
9
1
7
7
3
6
6
3
5
2
7
2
8
8
6
4
1
4
1
6
7
5
4
3
4
8
9
2
5
9
8
2
3
4
7
6
1
8
5
9
3
8
6
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