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
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)
ŝakmato tia, ke la reĝo ne eblas fuĝi al najbaraj ĉeloj pro kialoj po unu ekzakte por ĉiu ĉelo (eo)