PlaySudoku.us
Expert · Puzzle #822
2
3
6
9
6
8
9
7
4
8
7
2
5
3
1
1
8
2
4
1
8
3
4
6
"The mind is not a vessel to be filled, but a fire to be kindled." — Plutarch
"The mind is not a vessel to be filled, but a fire to be kindled." — Plutarch
Some Sudoku apps use neural networks to grade puzzle difficulty — training on millions of human solve attempts.
Some Sudoku apps use neural networks to grade puzzle difficulty — training on millions of human solve attempts.