Garry Kasparov was world champion between 1985 and 1993. In 2013 he left Russia and since then he has been denouncing Putin's regime.
He was included by the Kremlin on a list of “terrorists and extremists” The two had a memorable duel in the 1980s with another star of the boards, Anatoly Karpov, who is now a deputy for Putin's party. The two men lived together for 700 hours and faced each other in five matches for the world title.