Belsitzmann lived in Warsaw, where he played several times in tournaments with top Polish chess masters.
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.
His best achievement was in 1919/20 when he won, followed by Flamberg, Rubinstein, Dawid Przepiórka, etc.
[1][2] He died a short time later during the Polish-Soviet War.
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