using System;

using System.Collections.Generic;

​

public class Board{

​

    private bool chess ;

    private bool wall ;

    public Board(){

        chess = false;

        wall = false;

    }

    public bool Changechess{

        set{

            chess = value;

        }

    }

    public void wallorchess(){

        if (wall==true)

            Console.Write("|");

        if (chess==true)

            Console.Write("*");

        if ((chess!=true)&&(wall!=true)){

            Console.Write("O");

        }

    }

}

​

public class Gameboard{

    public Board[,] board;

    public int size;

    public Gameboard(int size){

        this.size = size;

        board = new Board[2*size-1,2*size-1];

    }

    public void initial(){

        for (int i=0;i<size*2-1;i++){

            for (int j=0;j<size*2-1;j++){

                if ((j==8)&&((i==0)||(i==16))){

                    board[j,i] = new Board();

                    board[j,i].Changechess = true;

                }

                else    

                    board[j,i] = new Board();

            }

        }

    }

    public void printidealboard(){

        for (int i=0;i<size*2-1;i++){

            for (int j=0;j<size*2-1;j++){

                if ((i%2==0)&&(j%2==0))

                    Console.Write("1");         // 1  indicate the possible position of chess

                else{

                    if ((i+j)%2 ==0)

                        Console.Write("0");     // 0  indicate nothing

                    else

                        Console.Write("W");         // W  indicate the possible position of wall                

                }

            }

            Console.WriteLine();

        }

    }

    public void printboard(){

        for (int i=0;i<size*2-1;i++){

            for (int j=0;j<size*2-1;j++){

                if ((i%2==0)&&(j%2==0))

                    board[j,i].wallorchess();           //   indicate the possible position of chess

                else{

                    if ((i+j)%2 ==0)

                        Console.Write(" ");     //   indicate nothing

                    else

                        Console.Write(" ");         //   indicate the possible position of wall             

                }

            }

            Console.WriteLine();

        }

    }

}

​

public class Program

{

    public static void Main()

    {

        Gameboard gameboard = new Gameboard(9);

        gameboard.initial();

        gameboard.printidealboard();

        gameboard.printboard();

    }

}