Can you figure out the check mate pattern

It is one of the happy moments when one of our student moves what has to be moved and showcases the learning happened  in the class.  
I was demonstrating the Anastasia's check mate pattern few days ago to one of my online batch students.It was surprising that in one of the practice games, the position was similar to that was discussed. One of my student utilised the opportunity and finished the game.  can you figure out the winning pattern ? 
Black has to move. Result 0-1