Levente Lengyel vs Istvan Bilek
Budapest Budapest HUN round 1 1965.02.??
Benko Gambit Accepted: Central Storming Variation 1/2-1/2

Bogdan Sliwa vs Istvan Bilek
Gotha Gotha GDR round 14 1957.09.??
King’s Indian Defense: Sämisch Variation 0-1

Istvan Bilek vs Tigran Vartanovich Petrosian
EUR-chT (Men) 2nd Oberhausen FRG round 4 1961.06.24
Sicilian Defense: Sozin Attack, Main Line 0-1

Luben S Popov vs Istvan Bilek
Ch Europe (team) (1/2 final) Sinaia ROU round 5 1964.08.??
Blumenfeld Countergambit 0-1

Vladimir Kovacevic vs Istvan Bilek
Vinkovci Vinkovci 1982.04.??
Australian Defense 1-0