What does illegalmate daughter mean?

The term "illegal mate" often refers to a situation in Chess where a player's move results in an illegal position, such as placing their king in check or making a move that violates the game's rules. However, the phrase "illegalmate daughter" does not appear to have a widely recognized or specific meaning in chess or other contexts. It may be a typographical error or a mix of terms; clarification might be needed to provide an accurate interpretation.