He was murdered in the Holocaust in Warszawa.
He played several times in the Warsaw championships.
He tied for 5-6th in 1926 (Abram Blass and Paulin Frydman won), tied for 6-7th in 1927 (Stanisław Kohn and Leon Kremer won), took 10th in 1928 (Blass won), tied for 5-6th in 1929 (Kremer won), tied for 10-11th in 1930 (Frydman won).
[1] Feinmesser, along with other members of the Warsaw team (Blass, Frydman, Kohn, Kremer, Karol Piltz, Henryk Pogorieły) won the gold medal in the 1st Polish Team Championship at Królewska Huta 1929.
[2] This biographical article relating to a Polish chess figure is a stub.