The Arabian mate dates back to at least the 1400s and probably much earlier; the three pieces involved in it have moved the same way since well before that time. The mate, pictured here in skeletal fashion, works equally well if White’s rook is on g8 rather than h7. Either way the rook takes care of the squares on the long diagonal while the knight covers the king’s flight squares of the opposite color. The signature of the pattern is a diagonal relationship between your knight and your opponent’s king, with or without an empty square between them. Then a heavy piece is added to one of the squares your knight covers.