PlaySudoku.us
Medium · Puzzle #688
8
5
6
8
7
5
6
2
4
3
8
1
8
5
6
3
9
8
5
1
4
6
9
1
7
7
4
6
5
9
9
4
Sudoku can be expressed as an integer linear program — a branch of optimization mathematics used in logistics and finance.
Sudoku can be expressed as an integer linear program — a branch of optimization mathematics used in logistics and finance.
Set theory provides the formal foundation for Sudoku's rules: each digit must appear exactly once per set.
Set theory provides the formal foundation for Sudoku's rules: each digit must appear exactly once per set.