Career
Born in Łomża (then Russian Empire), he moved to the United States of America, staying from 1911 to 1924. After returning to Poland, he lived in Warsaw. In 1926, he tied for 1st with Paulin Frydman in Warsaw.
In 1926, he tied for 8-9th with Mieczysław Chwojnik at the 1st Polish Chess Championship in Warsaw.
In 1927, he took 8th at the 2nd POL-ch in Łódź. Blass played for Poland on the reserve board (+4 –3 =5) in the 2nd Chess Olympiad at The Hague 1928.
The next year, he took 2nd in the Tel Aviv City-ch and tied for 2nd-3rd, behind Moshe Czerniak, in Tel Aviv (Palestine-ch).