Ключевые слова: background, black, blackboard, board, chalk, challenge, circle, contrasts, creative, cross, crosses, day, directly above, drawn, entertainment, fun, game, horizontal, in a row, leisure games, line, mark, naughts, no people, nobody, noughts, o, order, play, set, simple, stone, strategy, tac, tic, tic tac toe, toy, x, xo, xoxo, zen,