He participated in Mannheim 1914 chess tournament. After the declaration of war against Russia, eleven "Russian" players (Alexander Alekhine, Bogoljubov, Bogatyrchuk, Flamberg, Koppelman, Maliutin, Rabinovich, Romanovsky, Saburov, Selezniev, Weinstein) were interned in Rastatt, Germany. On September 14, 17, and 29, 1914, four of them (Alekhine, Bogatyrchuk, Saburov, and Koppelman) were freed and allowed to return home via Switzerland.
- "Manheim 1914 The Legend".
- http://www.anders.thulin.name/SUBJECTS/CHESS/CTCIndex.pdf Name Index to Jeremy Gaige's Chess Tournament Crosstables, An Electronic Edition, Anders Thulin, Malmö, 2004-09-01
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