- In 1931, at first reserve board in 4th Chess Olympiad in Prague (+7−3=1);
- In 1933, at fourth board in 5th Chess Olympiad in Folkestone (+5−6=3);
- In 1935, at fourth board in 6th Chess Olympiad in Warsaw (+4−4=4);
- In 1936, at fifth board in 3rd unofficial Chess Olympiad in Munich (+7−7=3).
Hasenfuss won individual bronze medal in 1931.
He took 6th at Riga 1932 (Vladimirs Petrovs won), took 4th at Riga 1934 (LAT-ch, Fricis Apšenieks and Petrovs won), tied for 17th–18th at Kemeri 1937 (Samuel Reshevsky, Petrovs and Salo Flohr won), and took 10th at Kemeri / Riga 1939 (Flohr won).
- Alfrēds Krūmiņš, "No atmiņu cikla" ("From memory cycle"), magazine "Ilustrētais Vārds" 01.02.1947.
- Wolfgang Hasenfuss player profile at chessgames.com
- Wolfgang Hasenfuss player profile at 365chess.com
- Wolfgang Hasenfuss player profile at olimpbase.org
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