// player 2 take shot
        private void button4_Click(object sender, EventArgs e)
        {
            // click on your own board to take shot at opponent
            int rowindex    = Board2.SelectedCells[0].RowIndex;
            int columnindex = Board2.SelectedCells[0].ColumnIndex;

            var is_shot_hit = player1.takeshot(rowindex, columnindex);

            if (!is_shot_hit)
            { // give  chance to the other player as it is a miss
                button3.Enabled = true;
                button4.Enabled = false;
            }
            else   // if hit check if all ships sunked
            {
                if (player1.checksunkShips())
                {
                    button4.Enabled = false;
                    gameResult.Text = "All ships of Player 1 sanked and Player 2 has won";
                }
            }



            setGrid(player1, Board1);
        }