Checkmate in Seven

In each of the two positions below, Black has a forced checkmate in seven moves. The first position is from Schulten -- Morphy, New York 1857. Morphy played the correct sequence and the game ended when it was checkmate in three. The second arose in Hawkins -- Pert, British Championship 2015, Chess Informant 127/5. Nicholas Pert missed the checkmate in seven, but nonetheless drove the White king to the queenside and prevailed in the game. Despite losing this game, Jonathan Hawkins went on to win the event, becoming the British Champion.

Black to move

Black to move