PlaySudoku.us
Medium · Puzzle #438
7
4
5
6
2
7
7
4
2
6
2
3
5
9
4
5
3
1
9
7
6
8
4
1
7
6
1
5
3
8
1
8
1
9
4
"The measure of intelligence is the ability to change." — Albert Einstein
"The measure of intelligence is the ability to change." — Albert Einstein
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.