Eight queens puzzle

Instructions:

• In this game, the eight queens can move like the standard chess queen's moves, that is, no two queens sharing the same row, column, or diagonal.
• The game involves putting eight chess queens on a chessboard in a way that none of them are able to capture any other.
• To move the queens, click and drag them onto the chessboard. To remove the queens click on them and drop them off the chessboard.
• If you place any queen in such a way as to capture another, the queens in the conflict will show a flicker warning.