Changes

[https://en.wikipedia.org/wiki/Paul_Frielinghaus Paul Erich Frielinghaus], a German actor, developed a Kalah program (he called the game Serata) as High School student in 1978 and participated in the German youth science competition [https://en.wikipedia.org/wiki/Jugend_forscht Jugend forscht] <ref>[httphttps://www.jugend-forscht.de/stiftung-jugend-forscht-e-v/historie/erfolgreiche-ehemalige/dr-lessing-loest-jeden-fall.html Jugend forscht | Dr. Lessing löst jeden Fall - Paul Erich Frielinghaus - 5. Preis Mathematik/Informatik 1978] (German)</ref>.