It was used by the West German Chess Federation from 1948 until 1992 when it was replaced by an Elo - based system , Deutsche Wertungszahl .
The Ingo system was designed by Anton Hoesslinger and published in 1948 .
system was used by the West German Chess Federation from 1948 until 1992 when system was replaced by an Elo - based system , Deutsche Wertungszahl .
The Ingo system was designed by Anton Hoesslinger and published in 1948 .