I think this game is one of the most overrated in history. It looks to have simply been lost in the end game after an interesting opening. (take a look at whites 33rd)

However let's look at the star move 10...e4 though. What about 11 Bxb5 Nxb 12 Qa4 and the white has got his queen active.

Interestingly enuf the very same motiff (a B for 3 pawns) could have been played on move 9. And why should that be a suprise to us since this possibility was brought to us gift wrapped by black who by playing 5...b5 was already offering a B for three pawns (i.e. the q-side pawns will be disconnected) at the very outset.

That white refuses this offer and retreats the B to f1 means that white is content to give up a tempo and see what black will do. Maybe that is ok for white but you have to wonder if white doesnt value the break of the pawns as 3 how does he value them? Something less? It's funny that we are all taught from the beginning that you have to avoid doubled pawns and ISO pawns, but often even GM are afraid to take this lesson literally.

The telling pt is this: that white had a chance to swap a B for 3 pawns on move 6 and didn't take it, then he has a similar chance on move 9 then he has a similar chance on move 10. You have to ask yourself as a player: how many times can I keep avoiding a line that appears to be balanced, even though it looks tricky?

Hmm, a B for three pawns, "well I don't know about that..." is how most players probably think about it. Which is okay for one move I suppose, but when that same motiff keep reoccuring in the game you have to ask yourself if you are not fooling yourself into a bad line by avoiding the toughest line.

A better example. this young master was asking Petrosians advice, the young master only needing one more draw to achieve some rating or something. Pet. told him something I forget exactly what. So he went out and played his game as conservatively as possible and loss to some brilliant tactics.

He asked Pet. what went wrong and P. said "didn't I tell you have to play ever game as if on the edge of a precipice?"

Anyhow I was hoping white could trade rooks and still be in position to grab blacks h pawn and get back and cover the queening situation. If black is left w/ a RP then maybe he can draw.

But it looks worse than that w/ black maybe keeping both a and b pawns.

Going backs to whites 31/32nd moves, it looks like he's lost time since the rook remains where it was on f1 and black has both side K and R. Perhaps a better move could be played there. Not sure what.

Anyway, what do you see in 9 Bxb5+ Nxb5 10 Qa4 Qxe4+ ?

It may be worthwhile to sacrifice a bishop for three pawns in the endgame, but usually not in the early middlegame on a board full of pieces and tactics.

Estrin might have tried Qb3, as everyone who studies this line knows.