Test yourself with The Emperors Lock from Professor Puzzle. Whilst taking this puzzle apart may be easy, trying to rebuild it will prove a great feat of patience and dexterity. Locks have been used throughout history to protect valuable belongings and secrets but no protection systems are more infamous than those used in the tomb of Qin Shi Huang, the first emperor of China. To ensure his tomb remained untouched, it was booby-trapped with flying arrows, moats of deadly poison and ornate locking mechanisms designed to trap those who would disturb the emperor. Part of the Grand Masters range. Difficulty Rating: Emperor.