Compelled Move

Sometimes in a game of chess, you are in a position that you will be in loss as soon as you will make a move. This situation is called Zugzwang. It is a German word, meaning compelled to move. For e.g. in diagram, White's first move still leaves Black secure. But note carefully, any Black move will cost it a material loss. Hence, it is restricted to pawn moves only. So in this situation, once Black has made all the pawn moves, it will have to lose material.
Usually a move considered as a blessing in the chess game, but this one is a curse..!!