Your customer asks you to develop the software that allows a blue player to play the SOS game against a red player. Either player can be human or computer. The game board is a grid of n$$n $($n$>2)$ squares. The two players take turns to add either an $"$S$"$ or an $"$O$"$ to an unoccupied square, with no requirement to use the same letter each turn. Each player attempts to create the straight sequence S$-$O$-$S among connected squares $($diagonally$,$ horizontally, or vertically$).$ To keep track of who made which SOSs, a line in the players color $($i$.$e$.,$ blue or red$)$ is drawn for each SOS sequence, as shown in the following figure.