PlaySudoku.us
Medium · Puzzle #283
6
4
7
3
6
8
3
7
4
8
2
7
9
1
1
8
5
7
1
6
9
4
2
3
5
7
4
8
1
4
3
2
5
7
"Mathematicians do not study objects, but relations between objects." — Henri Poincaré
"Mathematicians do not study objects, but relations between objects." — Henri Poincaré
There are Sudoku variants with extra constraints: Killer Sudoku (cage sums), Diagonal Sudoku, and even 3D Sudoku.
There are Sudoku variants with extra constraints: Killer Sudoku (cage sums), Diagonal Sudoku, and even 3D Sudoku.