PlaySudoku.us
Easy · Puzzle #424
3
9
1
5
8
7
4
2
5
3
7
6
1
8
9
2
5
4
1
6
7
5
9
8
7
9
1
8
5
3
3
2
9
1
7
2
1
3
8
4
7
6
5
9
1
4
7
2
9
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.
"Chess is the art of analysis." — Mikhail Botvinnik
"Chess is the art of analysis." — Mikhail Botvinnik