sentences:  Shortly after, bitter cold set in.The next encounter, at Zlatitsa Pass just before Christmas 1443, was fought in the snow and the Hungarians were defeated.As they in turn retreated they ambushed and defeated a pursuing force at the Battle of Kunovica, where Mahmud Bey, brother-in-law of the Sultan and brother of the Grand Vizier Çandarlı Halil Pasha, was taken prisoner.