PlaySudoku.us
Medium · Puzzle #670
2
9
6
4
8
6
9
3
5
4
7
1
2
1
8
5
4
3
1
9
5
8
9
2
4
5
8
7
8
6
5
3
2
1
4
1
6
The number of essentially different Sudoku grids (accounting for symmetry) is 5,472,730,538 — about 5.5 billion.
The number of essentially different Sudoku grids (accounting for symmetry) is 5,472,730,538 — about 5.5 billion.
The number of essentially different Sudoku grids (accounting for symmetry) is 5,472,730,538 — about 5.5 billion.
The number of essentially different Sudoku grids (accounting for symmetry) is 5,472,730,538 — about 5.5 billion.