17 January 1940 - Dawid Przepiórka, Stanisław Kohn, Moishe Lowtzky, Achilles Frydman, Abkin, Młynek, Zahorski and many others were arrested at the Kwieciński Chess Café in Warsaw, and imprisoned at Daniłowiczowska Str. (they had played a prison tournament won by Lowtzky there). Later (February - March 1940) most of them (all Jewish) were killed in a mass execution by the Nazis in Palmiry, General Government.
23 September 1940 - The National Chess Centre in London was destroyed by fire during The Blitz.
The famous French chess magazine La Stratégie ceases publication after 73 years. It had been established in Paris in 1867.