20:06HARDtalkGarry Kasparov - Opposition Activist and Former World Chess ChampionBBC World Service Duration: 23 minutes Fri 13th Sep 2013, 20:06 on BBC World Service OnlineAvailable for over a yearDownloadIs there any serious challenge to the supremacy of Putinism in Russia? Show more GenresNewsFormatsMagazines & ReviewsBrandHARDtalk Source: BBC Online