Due to an error in some editions of the Observer last week, the closing date for entries for this puzzle has been extended by a week. As a result, the relevant blog will now appear next Sunday (20/10/13).
Never knowingly undersolved
Due to an error in some editions of the Observer last week, the closing date for entries for this puzzle has been extended by a week. As a result, the relevant blog will now appear next Sunday (20/10/13).