private void openFreeGameButton_Click(object sender, RoutedEventArgs e)
        {
            SingleGameWindow game = new SingleGameWindow(Player.Blue);

            game.Owner = this;
            game.Show();
        }
        private void playWithNetworkButton_Click(object sender, RoutedEventArgs e)
        {
            Button           button = sender as Button;
            NeuralNetwork    nn     = (NeuralNetwork)button.Tag;
            SingleGameWindow game   = new SingleGameWindow(Player.Blue, nn, OtherPlayer);

            game.Owner = this;
            game.Show();
            OtherPlayer = null;
        }