PlaySudoku.us
Evil · Puzzle #245
1
9
5
7
5
3
4
6
3
1
3
2
4
4
9
6
9
5
1
2
2
9
8
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.
Before using pencil marks, see how far you can get with pure logic and mental candidate tracking.
Before using pencil marks, see how far you can get with pure logic and mental candidate tracking.