High Quality Content by WIKIPEDIA articles! Zugzwang (German for "compulsion to move", pronounced [ tsu ktsva ]) is a term originally used in chess which also applies to various other games. THe concept finds its formal definition in combinatorial game theory. IT describes a situation where one player is put at a disadvantage because he has to make a move the player would prefer to pass and make no move. THe fact that the player must make a move means that his position will be significantly weaker than the hypothetical one in which it is his opponent's turn to move. IN game theory, it specifically means that it directly changes the outcome of the game from a win to a loss. THe term is used less precisely in games such as chess; e.G., the game theory definition is not necessarily used in chess (Berlekamp, Conway & Guy 1982:16), (Elkies 1996:136).