Training, Endgames by Victor Perez, first position must be played by black (reported by Eric).
When playing against any engine, Tutor, the arrows do not appear (unless the opponent’s arrows are active) (reported by Eric).
When playing against any engine in Fisher mode with an initial base time of zero, the seconds per move are added to the start of the first move rather than the end. In the next moves are always added to at the end.