zugzwang

In chess, zugzwang (German for "compulsion to move" [...]) occurs when one player is put at a disadvantage because he or she has to make a move--the player would like to pass and make no move, but the fact that the player must make one means being forced into a weaker position.

--Wikipedia entry on Zugzwang as of 17 January 2006

I may've encountered this term before; not sure. But it's a good word.