One of the greatest games ever played

I remember this game from Kasparov's book analyzing the match. Those were the longest 20 pages ever!
By the way, didn't Karpov win earlier in the match (this may be the preceding "Moscow Marathon" I'm recalling) in a Ruy Lopez game?

yes Karpov won the first match after several draws but kasparov wasn't happy and beat him the next three games