Black moved last. What was Black's last move & what was White's?
There are, at least, 3 solutions.
(In reply to
A Fourth Solution? [possible spoiler] by Vernon Lewis)
Ho, Matey! The King is Dead -- Long live the King ... Probably Black played on (very unprofessional) hoping that clueless White would engineer a draw -- hard to think that even beginners could reach such a board.