PlaySudoku.us
Easy · Puzzle #211
3
6
4
7
4
3
2
6
9
9
6
1
2
5
3
1
4
8
4
2
9
6
3
6
3
9
2
8
1
7
6
1
8
5
2
9
8
5
4
7
3
1
6
2
1
3
6
5
8
7
4
The hardest published Sudoku puzzle — graded by the number of search nodes a computer needs — was named 'Al Escargot' by its creator.
The hardest published Sudoku puzzle — graded by the number of search nodes a computer needs — was named 'Al Escargot' by its creator.
The 16×16 version of Sudoku is called "Super Sudoku" and uses hexadecimal digits or letters.
The 16×16 version of Sudoku is called "Super Sudoku" and uses hexadecimal digits or letters.