PlaySudoku.us
Hard · Puzzle #87
3
2
9
4
8
1
2
6
7
6
9
3
9
4
3
2
6
8
3
6
2
9
6
5
4
1
8
6
9
7
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.