Maybe you know what you're talking about but I doubt if anyone else will, are you referring to zugzwang or zwischenzug by any slim chance?
https://en.wikipedia.org/wiki/Zugzwang
http://www.netplaces.com/chess-basics/tactical-weapons/zwischenzug.htm
BOARD LOCK ????
Sort:
I think the name starts with a z. and when the board gets locked who evers move it is is going too get it when they move. =????