Expert sudoku — printable sheet 18
Four expert puzzles, one page. Answer key for this sheet.back to the puzzles.
8
1
9
7
6
5
3
2
4
2
5
3
4
9
8
7
1
6
6
4
7
2
3
1
5
9
8
4
3
2
5
7
6
1
8
9
7
9
8
1
2
3
6
4
5
1
6
5
9
8
4
2
7
3
9
7
4
3
5
2
8
6
1
5
2
6
8
1
9
4
3
7
3
8
1
6
4
7
9
5
2
3
5
4
2
9
1
7
6
8
6
8
9
3
7
4
1
2
5
7
2
1
8
5
6
4
9
3
5
1
8
7
6
2
3
4
9
9
4
3
5
1
8
2
7
6
2
6
7
4
3
9
8
5
1
4
3
2
6
8
5
9
1
7
8
9
6
1
2
7
5
3
4
1
7
5
9
4
3
6
8
2
3
4
1
6
9
7
5
8
2
6
9
5
2
3
8
4
7
1
2
7
8
4
1
5
6
9
3
8
5
6
3
7
4
1
2
9
7
1
2
9
8
6
3
4
5
4
3
9
5
2
1
8
6
7
5
8
7
1
4
9
2
3
6
9
6
3
8
5
2
7
1
4
1
2
4
7
6
3
9
5
8
5
8
7
1
3
6
2
9
4
9
2
3
5
4
8
6
1
7
4
1
6
9
2
7
5
8
3
6
3
1
2
9
5
7
4
8
2
9
8
3
7
4
1
6
5
7
4
5
8
6
1
9
3
2
3
5
4
7
1
9
8
2
6
8
6
9
4
5
2
3
7
1
1
7
2
6
8
3
4
5
9
Sheet 18 of 20 · all expert sheets