Expert sudoku — printable sheet 15
Four expert puzzles, one page. Answer key for this sheet.back to the puzzles.
7
8
4
9
2
5
6
3
1
6
9
2
4
1
3
7
5
8
3
5
1
7
6
8
9
2
4
5
2
8
6
7
9
1
4
3
1
7
6
5
3
4
8
9
2
4
3
9
2
8
1
5
7
6
8
4
7
1
5
2
3
6
9
2
1
5
3
9
6
4
8
7
9
6
3
8
4
7
2
1
5
5
1
7
9
2
8
3
4
6
3
2
4
5
6
1
9
7
8
9
8
6
7
3
4
5
1
2
6
5
1
8
7
9
2
3
4
7
9
2
3
4
5
6
8
1
4
3
8
2
1
6
7
5
9
8
7
3
1
9
2
4
6
5
2
4
5
6
8
3
1
9
7
1
6
9
4
5
7
8
2
3
4
1
3
2
6
7
9
8
5
7
9
5
3
8
4
1
2
6
6
8
2
9
1
5
4
3
7
9
2
7
6
3
1
5
4
8
1
4
8
5
7
2
6
9
3
3
5
6
8
4
9
7
1
2
5
7
9
4
2
8
3
6
1
2
3
4
1
5
6
8
7
9
8
6
1
7
9
3
2
5
4
3
8
2
6
4
5
9
1
7
6
7
4
2
9
1
5
8
3
9
5
1
7
8
3
6
2
4
5
1
8
4
3
6
7
9
2
2
6
9
8
1
7
3
4
5
4
3
7
9
5
2
1
6
8
8
9
6
5
7
4
2
3
1
7
2
3
1
6
8
4
5
9
1
4
5
3
2
9
8
7
6
Sheet 15 of 20 · all expert sheets