In 1966, he made his best career result with 10.5/18, for 6th place, as Gideon Barcza won.
Varnusz shared 2nd-3rd places in the medium-strength Master event at Salgótarján 1978 with 10/13.
[1] Varnusz is best known as a chess writer, and has published 15 titles, in both German and English (translated).
Here is a list of his book titles (http://www.chessworld.org, the Egon Varnusz entry).
Media related to Egon Varnusz at Wikimedia Commons