20x20
#012
- : Checked (Click or Mouse over while pressing A key.)
- : Unchecked (Click or Mouse over while pressing S key.)
- x : X mark (Click while pressing D key or Mouse over while pressing D key.)
- Using Hint ! : Fill randomly selected one row and one column.
- Using Help ! : There are any mistake in rows and columns, and then check.
- * Be careful, if you are wrong file or more times, the game is over.