PlaySudoku.us
Hard · Puzzle #908
4
6
5
4
9
3
6
8
9
7
6
1
9
3
2
8
6
3
9
6
2
3
1
8
5
6
4
3
7
5
Group theory classifies Sudoku symmetries: the automorphism group of the 9×9 Sudoku grid has order 1,218,998,108,160.
Group theory classifies Sudoku symmetries: the automorphism group of the 9×9 Sudoku grid has order 1,218,998,108,160.
"Even the laziest king flees wildly in the face of a double check!" — Aaron Nimzowitsch
"Even the laziest king flees wildly in the face of a double check!" — Aaron Nimzowitsch