In case that roles of evil strangers and heroes were clearly casted among children, there was a cardinal rule 'evil strangers are always defeated by heroes at the end - encouraging the good and punishing the evil,' following the convention of historical dramas, therefore there were often competitions for heroes.
鉄則は、時代劇の文法を守って「最後に悪人は正義の味方に倒される（勧善懲悪）」というものであり（ただし明確に悪人役が決められて遊ぶ場合に限る）、このため役を決めて遊ぶ場合には、正義の味方役が奪いあいになることがよくあった。