In 1910, he tied for 1st–2nd with Ladislav Prokeš in Prague. After World War I he played in several tournaments in Prague. In 1921, he tied for 1st–2nd with Hromádka.
In 1929, he took 2nd, behind Salo Flohr.
He was an elder brother of Karel Treybal.
In 1907 he won the 2nd Czechoslovakian Chess Championship in Brno. In 1907 he also won in Berlin, and tied for 5–6th in Prague (Oldřich Duras won). In 1908, he took 20th in Prague (Duras and Carl Schlechter won). In 1909, he took 4th in Prague (Duras won). 1913, he won in Berlin and took 2nd, behind Karel Hromádka, in the 5th Czechoslovakian Championship in Jungbunzlau (Mladá Boleslav). In 1924, he tied for 4–5th (January Schulz won). In 1927, he tied for 5–8th (Hromádka won).
