Just found "Gedaechtnis" - a "Memory" like game against computer or another player (hotseat) from 1989 written by me and I got some support from Joachim Braun, too, both known as "SRS" (Sand-Rabbit-Software)

Btw.: Sand-Rabbit is how the people of our village were called by the people from the other villages around here as we have a sand earth here and had a lot of rabbits or hare.