Movsas Feigins was born in Dvinsk (then Russian Empire, now Daugavpils, Latvia).
In 1937, he tied for 15th–16th in the Kemeri 1937 chess tournament (Salo Flohr, Petrovs and Samuel Reshevsky won); took 2nd in Brussels (Quadrangular, Alberic O'Kelly de Galway won); took 3rd, behind Petrovs and Fricis Apšenieks, in Riga (7th LAT-ch, Triangular), and took 2nd in Riga (Quadrangular, Paul List won).
[3] In September 1939, when World War II broke out, Feigins, along with many other participants of the 8th Chess Olympiad decided to stay permanently in Argentina.
[4] In March 1941, Feigins tied for 6th–8th in the Mar del Plata 1941 chess tournament (Gideon Ståhlberg won).
He was 4th in Asunción 1944 and remained in Paraguay until 1946[5][6] when took 3rd at Buenos Aires (Círculo "La Regence").