My chess game

I am playing a game against Streetking my next move is check mate but it will not accept the move although perfectly legal,Game 9554543

When I make the move the square goes pink and will not accept a legal move Help

Originally posted by Captain Jack
When I make the move the square goes pink and will not accept a legal move Help

You are in check yourself so the only "legal" move is to get out of check

Thanks venda If I had a brain I would be dangerous