Heinrich Cordes (10-10-1852 - 24-04-1917) German composer
Heinrich Cordes was a writer, chess solver and composer.
The endgame that made him famous was the following reciprocal zugzwang:
Cordes, Heinrich
Rigaer Tageblatt, 1895
2
nd Prize

Show Solution1. Bc7 ! Qe1+
{1... Qxf2 2. Kh2 g4 3. Bd8+ wins}
2. Kh2 Qxf2 3. Bd6 !
{Tempo. The Bishop must keep an eye on the d8-h4 diagonal: 3.Bb8? g4!}
3...Qf4+ 4. g3+ Qxg3+ 5. Bxg3#