A chess problem in which one player (usually White, moving first) must force the other to deliver checkmate, typically within a specified number of moves; a checkmate forced in this way; = "selfmate". Compare "sui", sui-mate .
sui-mate/ˈsuːɪˌmeɪt/ /ˈsjuːɪˌmeɪt/ /ˈsuːʌɪmeɪt/
Mid 19th century. From classical Latin suī of oneself + mate, perhaps after suicide.