Portal:Chess/Did you know/30

...that Boris Spassky won the second game of his world championship match against Bobby Fischer by forfeit when Fischer refused to play after organizers rejected his request to remove all cameras?
...that the number of possible chess games exceeds the number of atoms in the Universe?
...that Tigran Petrosian, who once was awarded a Master of Philosophy diploma for his Chess Logic thesis, is the titular inspiration for two major opening systems, one in the King's Indian Defence and the other in the Caro-Kann Defence?
...that a 2005 endgame tablebase analysis demonsrated that, with perfect play by each player, a player with four knights may deliver checkmate to a player with one queen in 85 moves?