PlaySudoku.us
Easy · Puzzle #989
4
1
3
5
9
6
2
4
6
5
3
9
2
1
3
8
4
8
1
6
7
7
1
9
4
2
3
5
9
3
2
7
6
8
4
6
1
8
2
1
2
7
6
5
4
3
6
4
9
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.
A Sudoku puzzle's 'information content' can be measured: a minimal 17-clue puzzle encodes roughly 26 bits of information.
A Sudoku puzzle's 'information content' can be measured: a minimal 17-clue puzzle encodes roughly 26 bits of information.