I think it's to reroute the knight on g6, because I saw Capablanca and his oponents do it.
Why/How is this move the most accurate one?
Nf8 overprotects pawn h7 in view of a possible Bxf6 eliminating Nf6. Nf8 also opens the diagonal for Bc8.
Hmmmm. Protecting h7 in case of Bxf6, maneuvering it to g6 are some ideas. This is very common when fischer has played the ruy lopez with white and in many games he has played Nf1.
A N on g6 is usually not so great in the Exchange Variation unless there are prospects to play Nh4 to trade the Nf3 and start some kingside initiative. The most common plan in this line is to exchange White's good bishop on d3 with the typical manoeuver Nf8, g6, Ne6, Ng7 and Bf5.
Some other points behind Nf8 are :
* it opens the c8/h3 diagonal for the bishop, so for instance 11. Ne5 can be met with 11... Ng4 trying to trade pieces to relieve the pressure.
* it protects h7, which is necessary if Black wants to play the typical Queen's Gambit move Ne4 at some point, for instance the immediate 10... Ne4 loses a pawn after 11. Bxe4 because h7 hangs.
I was confused for a second, but it defends the pawn after Bishop takes Knight, and it can block any future battery diagonal stuff my moving to G6.
you can use the saying, “if there’s a knight on f8 there is no mate” and also you are trying to reroute the knight to the kingside/push some pawns
Think like that: Black wants to play ...Ne4, which right now loses a pawn.
So, he has to take care of the h7 pawn first, and now Nf8 looks more logical.
All that said, the other moves which prepare this plan (10...h6, 10...g6) are equally "accurate".
There is no such thing as "the most accurate move" here. There's a massive difference between the most played or the most respected and the most accurate. The most accurate would mean that it achieves effectively the same thing as another move but better for a concrete reason, for example by cutting some good options out for the opponent. You more often of the most accurate move order. It's a mistake to call this the "most accurate move".
Sorry for appearing to stalk you pfren it's just so bizarre to see a IM posting in this cesspool on the daily.
In the book I was studying, there was no other line. Just Nf8.
I was just studying the QGD Exchange Variation and just found out that in this position, Nf8 is the most accurate move.
Why? I don't see a future for the knight on e6 because of the e3 pawn.