Career
In December 1941, he played for Slovakia in a match against Croatia on first board with Lajos Asztalos (1: 1) in Zagreb. In 1942, he tied for 9-10th in Munich (Europameisterschaft, 1st European Individual Chess Championship). In 1946, he tied for 13-14th in Prague (Treybal Memorial).
In 1948, he tied for 11-13th in Karlovy Vary (Karlsbad) – Marianske Lazne (Marienbad).
Ivan Vladimir Rohaček vs Josef Rejfiř, Luhačovice 1935, Old Benoni, A43, 1-0
January Foltys vs Ivan Vladimir Rohaček, Munich 1941, Europa Turnier, Tarrasch Defense, Von Hennig Gambit, D32, 0-1
Ivan Vladimir Rohaček vs Klaus Junge, Munich 1942, 1st European Championship, Semi-Slav Defense, Marshall Gambit, D31, 1-0
Ivan Vladimir Rohaček vs Enrico Paoli, Trenčianske Teplice 1949, Four Knights Game, Scotch Variation, Accepted, C47, 1-0.