pure mate
checkmating position such that the mated king is attacked exactly once and prevented from moving to any of the adjacent squares in its field for exactly one reason per square
en-GB/ˈpjɔː meɪt/
en-US/ˈpjʊɹ ˈmɑteɪ/
checkmating position such that the mated king is attacked exactly once and prevented from moving to any of the adjacent squares in its field for exactly one reason per square