Career
Belsitzmann lived in Warsaw, where he played several times in tournaments with top Polish chess masters. In 1913, he drew a match against Salomon Langleben (+1 –1 =2). He tied for 4-5th in 1916/17, and 3rd-4th in 1917, both with Alexander Flamberg, and both behind Akiba Rubinstein and Moishe Lowtzky.
He died a short time later during the Polish-Soviet War.