The World Chess Championship 1963 was a match played between the challenger Boris Spassky and Tigran Petrosian who was the defending world chess champion.
Petrosian could hold on to the title by winning the match very narrowly 12.5 : 11.5, being just one point ahead. (4 wins, 3 losses, 17 draws).
Grandmaster Ben Finegold looks at Tigran Petrosian's first world championship defense against Boris Spassky, specifically the tenth game. Ben describes the grueling path to the match for Spassky.