Public puzzle
SE grade 8.5 Sudoku
8.5SE grade · 17 clues
By The Hardest Sudoku Team · Last updated
8
3
6
7
1
8
5
1
4
6
3
1
2
4
6
2
5
Givens only — solution not shown.
About this puzzle
An SE grade 8.5 Sudoku with 17 clues — diabolical, broken open only by forcing chains.
The SE grade is the canonical difficulty number from Sudoku Explainer — read how it works on the SE grade page.