Ключевые слова: aged, aging intellect, bishop, board game, checkered board, checkmate, chess, chess game, chess pieces, chessboard, competition, concentration, contemplation, elder, elderly, elderly activity, elderly leisure, elderly pastime, elderly strategy, game, intellect, intelligent, king, knight, leisure, man, mental exercise, move, nature, nature play, opponent, outdoor chess, outdoor recreation, outdoors, park, pawn, playing, queen, recreation, retirement, retirement pastime, rook, senior, senior citizen, senior engagement, strategic, strategy, thoughtful, wooden pieces,