PlaySudoku.us
Medium · Puzzle #42
7
1
5
4
2
7
9
1
5
7
1
4
9
6
7
9
5
6
4
2
9
6
7
2
1
9
3
8
7
7
5
6
4
9
3
"Impossible is not a fact. It's an opinion. Impossible is not a declaration. It's a dare." — Muhammad Ali
"Impossible is not a fact. It's an opinion. Impossible is not a declaration. It's a dare." — Muhammad Ali
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.