PlaySudoku.us
Hard · Puzzle #447
8
4
1
9
3
4
8
9
2
4
7
4
6
8
1
6
8
9
2
3
7
3
4
9
1
1
7
9
8
6
3
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.