PlaySudoku.us
Hard · Puzzle #280
7
4
5
5
1
3
9
4
8
7
3
6
3
2
9
8
2
1
5
4
7
4
9
3
8
9
2
1
8
6
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