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08-12-2021 Sergej Yushkevitch:
With white piece 47, instead of 48, the author is S.Perepelkin, website "Shashki v Rossii", see here: http://www.shashki.com/PNphpBB2-viewtopic-t-1122-postdays-0-postorder-dec-start-15.html the post from 21.04.2008