Rabar participated at the 1st Balkaniad in Belgrade in 1946. Yugoslavia won, ahead of Romania, Bulgaria, and Albania. He won silver medal at 8th board. Rabar played in three Chess Olympiads. In August/September 1950, he won two gold medals: individual at fourth board (+8 –0 =2), and team, along with Gligorić, Pirc, Petar Trifunović, Milan Vidmar jr, and Stojan Puc, at the 9th Chess Olympiad in Dubrovnik. In August 1952, he played at second board at the 10th Chess Olympiad in Helsinki (+5 –1 =6). Rabar won two bronze medals (individual and team). In September 1954, he played at fourth board at the 11th Chess Olympiad in Amsterdam (+1 –3 =4). Yugoslavia won bronze medal. In the three Olympiads, Rabar won five medals, and in 30 games scored (+14 -4 =12), for 66.7 per cent.