I add one last thing. Shaws line vs b6 system seems to be a bluff. He only covers 11 .. Nf6 and according to computer this is a mistake that gives white an edge! Nf6 is not even a top 5 computer move!

MNb wrote on 02/27/18 at 14:44:50:

That article inspired me to pick up that line in practice. I scored a very easy win with it this season. Some fascinating analysis of it can be found at
http://schaken-brabo.blogspot.com/2017/11/records.html
and
http://chess-brabo.blogspot.com/2017/11/the-butterfly-effect.html
Before I played the "old" mainline which isn't completely dead either. There are still some ideas which are worth to try see http://chess-brabo.blogspot.com/2015/10/the-sequence-part-2.html

Then play is similar to Kleijn-Van Delft.
Sorry that I didn't make it clear at once. This piece sac must decide which move is the better one, 7.Bf4 or 7.Be3. So anyone wanting to play 5.Nc3 as White will have to systematically compare all possible lines to find out which square is best for the queen's bishop. The subtle differences may be deeply hidden.

About  Philippe,C (2422) - Koch,J (2476) [C42]
TCh-FRA Top 12 2011 Mulhouse FRA (3.5), 28.05.2011

Shaw does not even mention Bxa2. From my memory convential theory suggested that Bxa2 is only possible if the Bishop is at f4 and unplayble if the Bishop is at e3. However I need to computer check  the variation.

I actually own the book, I forgot what it went vs Petroff. My plan was to read the book when the after the  reading the very delayed sicilian part who has no been reased yet nad no one knows when it comes out. While I only played Petroff as black is corr games I can only comment  on the lines I played in these games where I played the casle short and early b6 line.  The b6 model game is Dominquez Perez -So 2014 at move 11 Shaw correctly writes that whites position is more easy to handle in practical play but it is unclear if white has any objective advantage and since there is no direct contact black has many moves to choose from.  He only looks at Nf6 as played in the game where the basic Petroff move I used  quates the game and instead suggests 11 .. Nc5 12 Bf5 Re8 as some sort of improvment. I have no engine at the moment so I have no idea who is right.

I dont know any good model games. Theory is developing very fast in 5 Nc3 line. First black often delayed castling or castled long but in cutting edge theory blacks castles short very early and plays and early b6 instead of the old Be6 system. Best source might by Chesspub subscription.

Cochrane Gambit might work in blitz or if the opponet does not know concrete theory but I have met in 2 times in corr and I won both games very easy, I simply followed a very basic Petroff books  (Move by Move) recomendation that I bought for use in corr chess and not for over the board games and white never got enough for the piece.

Thank you, any particularly good model games you could point to?
Best,