PlaySudoku.us
Medium · Puzzle #365
4
1
5
8
9
4
6
5
3
5
1
2
4
6
2
7
5
1
9
4
7
5
4
2
1
3
5
9
6
9
6
2
7
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.
Sudoku became a global phenomenon in 2004 after The Times of London started publishing it daily.
Sudoku became a global phenomenon in 2004 after The Times of London started publishing it daily.