PlaySudoku.us
Expert · Puzzle #658
6
8
9
5
7
2
5
8
3
1
6
3
9
7
1
5
3
7
8
4
5
9
1
2
"The more constraints one imposes, the more one frees oneself. And the arbitrariness of the constraint serves only to obtain precision of execution." — Igor Stravinsky
"The more constraints one imposes, the more one frees oneself. And the arbitrariness of the constraint serves only to obtain precision of execution." — Igor Stravinsky
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.