I don't know where the 10s and 9s come from. Its a good series, but a weak point is that it has hardly any connection with the real international chessworld at that time. OK, Spassky and Penrose are mentioned, but a Borsov simply doesn't excist. And where is Bobby Fischer, the upcoming talent in those days? Furthermore there are some other silly things. In tournament play kings aren't tipped over; shaking hands is sufficient to give up. And why are they playing so fast? They had at least 90 minutes for a game. It makes it all a bit unlikely, but maybe those things are inevitable when you want to make a movie like this.