Ключевые слова: activity, black, board, brain, casual, challenge, chess, chessboard, classic, competition, concentration, entertainment, focus, fun, game, gaming, gentlemen, hands, hobby, intellectual, interacting, interaction, leisure, lifestyle, match, mental, mind, opponent, opponents, outdoor, outdoors, people, pieces, play, players, recreation, skill, social, sport, strategic, strategy, tactics, thinking, thought, traditional, white,