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03-02-2018 Evgraf Zubov:
This problem I dedicate in memory Anatoly Uvarov (Sevastopol) (17.03.1947-20.08.2016) Forum "???? ???????? ?????????? ??????" http://www.shashki.com/PNphpBB2-viewtopic-t-2631.html  Changed on 11-02-2018.