PlaySudoku.us
Hard · Puzzle #627
6
9
7
8
6
2
8
4
1
6
5
1
4
4
6
3
1
2
9
5
3
9
8
7
6
1
2
8
4
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.