00769naa#a2200181#i#450# EN\\bibl\121259 20260502053018.6 1994-4683 20230803b2023####ek#y0engy0150####ca RU PSYCHOLOGICAL AND PEDAGOGICAL CONDITIONS NECESSARY FOR THE INITIAL PREPARATION OF CHESS PLAYERS FOR COMPETITIONS USING INDIVIDUAL TASKS Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2023 4 с. Journal article local Философские и научно-теоретические основы физической культуры и спорта. 796.011 uchzapiski.lesgaft.spb.ru