PlaySudoku.us
Hard · Puzzle #485
8
3
4
7
9
4
7
8
4
7
2
8
1
9
1
7
5
6
9
1
8
2
6
4
7
1
5
8
6
5
1
"A mathematician, like a painter or poet, is a maker of patterns." — G. H. Hardy
"A mathematician, like a painter or poet, is a maker of patterns." — G. H. Hardy
A Sudoku grid can be solved using only row and column logic, never needing box constraints — but it becomes exponentially harder.
A Sudoku grid can be solved using only row and column logic, never needing box constraints — but it becomes exponentially harder.