Like Ali v Frazier, how Magnus Carlsen kept his World Chess title after 50 hours and 12 draws

Like Ali v Frazier, how Magnus Carlsen kept his World Chess title after 50 hours and 12 draws Norway's world number one Magnus Carlsen retains his World Chess Championship after 12 draws and more than 50 hours of play - eventually beating Fabiano Caruana in a tie-breaker.