Wednesday Word of the Day (from dictionary.com/wordoftheday):
noun. in chess, a situation in which a player is limited to moves that cost pieces or have a damaging positional effect.
Oirigin of zugzwang: Zugzwang in German means “compulsion to move,” originally a technical term in chess for a situation in which one if forced to make a disadvantageous move. As a chess term, zugzwang has been in English since the early 20th century.