List window: Click Endgame tab.
Theme keys are only available optionally. Searching for similar endgames or similar structures is more precise and delivers much more exact results.
The endgame key is like any theme key, in which each entry is defined by the search mask. The contents of the endgame key are generally devoted to the different material configurations and the different tactical and strategic motifs found in the endgame.
If you load a game from an endgame key the program will jump to the position that led to the match (if that is possible).