MNb wrote on 07/26/06 at 01:17:19:
The Vienna move order only has the advantage of avoiding the Latvian.
1.e4 e5 2.Nf3 Nc6 3.Nc3 = 2.Nc3 Nc6 3.Nf3.
1.e4 e5 2.Nf3 Nf6 3.Nc3 = 2.Nc3 Nf6 3.Nf3.
1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Nc3 = 2.Nc3 Nf6 3.Nf3 d6 4.d4.
The Vienna gives Black the additional 1.e4 e5 2.Nc3 Bc5.
Only when White plays the Glek-Variation (4.g3) he might benefit from the Vienna move order, as sometimes Nge2 is more attractive.
So Ping Pong is right.
Actually the Vienna move-order also avoids the Elephant gambit (2.Nf3 d5). My clubmates who liked to play the Scotch used to be so scared of me playing either 2.Nf3 f5 or 2...d5 that they would play the move-order 2.d4 exd4 3.Nf3.
I can see another argument (quite predicatable coming from me, I know

) in favour of the Vienna move-order. After 2.Nc3 d6 White might want to go for 3.f4! Whereas if Black plays the Philidor 2.Nf3 d6 White has blocked his f-pawn. Of course one can argue the opposite: 2.Nf3 d6 allows White 3.d4 whereas 2.Nc3 d6 3.d4 is probably not good.
It is obvious that Black cannot play 2.Nf3 Bc5 but 2.Nc3 Bc5 can again be met by 3.f4!
I think the main argument should be one of statistics. How are you more likely to end up where want to go? And are there any variations along the road that you don't like (say 2.Nc3 Bc5 3.f4). Of course this depends on the level of your opponents, so statistics from TWIC are probably of little use here.
2.Nc3 allows Black to deviate with 2...Bc5, 2...Bb4, 2...d6 or even 2...c6.
After 2.Nf3 Black can avoid the Four knights with 2...d6, 2...f5 or 2...d5.
Perhaps my final argument should be this: Are there any variations (whether Black avoids the four knights or complies) where you do not want the knight on c3 or it is a liability? what about Nf3?
If you are looking for a good book on the Scotch Four knights. I can recommend the German language (with figurines) book "4.d4 im Vierspringerspiel" by Lev Gutman from 1993. It is dated but still a good introduction to the opening. I don't know if it was translated into english.
On a different note Weaver W. Adams had the same move-order problem getting into the KG declined (2.f4 Bc5 version).
2.f4 allows 2...exf4.
2.Bc4 can be met by 2...Nf6 3.d3 c6 and ...d5.
After 2.Nc3 he was flummoxed by 2...Nf6 3.Bc4 Nxe4 or 3.f4 d5.
Yesterday I saw IM Jens Kristiansen get into the KG declined with 2.Bc4 Bc5 3.Nc3 d6 4.d3 c6 5.f4 against Nigel Short at the Copenhagen open. Quite surprisingly Short was outplayed and mated in 36. (
www.politikencup.dk)