private void PlayAgain_Click(object sender, RoutedEventArgs e)
{
Storyboard winnerBannerOut = this.FindResource("WinnerBannerOut") as Storyboard;
winnerBannerOut.Begin();
boardHistories.Clear();
board = Game.NewBoard();
turn = 0;
animationPaused = false;
animationPending = false;
RenderBoard(board);
HandleAIMove();
}