Isaak Mazel
Isaak Yakovlevich Mazel was a Belarusian–Russian chess master.
He tied for 8-9th at Moscow 1931, tied for 15-16th at Leningrad 1934.
He shared 2nd, behind Nikolai Riumin, in Moscow City Chess Championship in 1933/34,
tied for 9-12th at Moscow 1936, and won ahead of Vladimirs Petrovs in Moscow City-ch in 1941/42.
