Checkmate Question - Help!


Hi all,

My friend and I were playing a friendly game on the computer, and after what appeared to both of us to be a checkmate the game actually never declared a winner.

Could someone please take a look at the last move and enlighten us on whether or not it is a checkmate? If it's not checkmate, could you please explain why?





cant the white queen block the black checking queen if only for one move?