Casimir (Kasimir, Kazimierz) de Weydlich (4 August 1859 – 17 September 1913) was a Polish chess master.
Born into an aristocratic family in Skotyniany, near Kamenets Podolskiy, he began his chess career in the early 1880s.
He tied for 5-6th at the 2nd Warsaw City Championship in 1883/84,[1] but won an individual game against Józef Żabiński, the winner of the event.
His best achievement was the second prize at Le Monde Illustré correspondence tournament in 1897.
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