A brief investigation over some of my databases is showing that the new move is 12...a6 while your 8.Nc3 was played three times before.
Though, it doesn't lessen your achievement.
Anyway, here are the games I have found after 8.Nc3

Willempie wrote on 03/08/05 at 09:59:09:



This sequence transposes back to a position arising from 3. .. Bf5 that was a main line in the earliest days of the variation.

Short v Seirawan from the Mamila Interzonal in 1990 being one such example.

MaSu wrote on 07/08/13 at 20:05:58:


I think that black has no problems after 7.--Nge7 8.Nbd2 - Nf5 9. Bd4 - Be7 is good enough.  Blacks play is easier. Whites pawn structure is bad.

In the 3.--Bf5 line, White has some lines, where white must play very accurate. 4.Nc3-e6 5.g4-Bg6 6.Nge2 or 4.h4-h5 5.Bg5!? [/quote]

This is, I humbly suggest, a crass oversimplification. There is a lot of theory in these lines. A huge amount. As ever, in a state of flux.

Quote:


I think that black has no problems after 7.--Nge7 8.Nbd2 - Nf5 9. Bd4 - Be7 is good enough.  Blacks play is easier. Whites pawn structure is bad.

In the 3.--Bf5 line, White has some lines, where white must play very accurate. 4.Nc3-e6 5.g4-Bg6 6.Nge2 or 4.h4-h5 5.Bg5!?

MaSu wrote on 07/07/13 at 11:19:30:

I think 3...c5 4.dxc5 Nc6 5.Nf3 Bg4 6.c3 e6 7.Be3 is better for white
(but I have no idea where to look for an advantage after 3...Bf5)

[quote author=063924352325560 link=1054160456/0#0 date=1054142455]In the Advance Caro-Kann with 1.e4 c6 2.d4 d5 3.e5, I sometimes wonder whether 3...c5! deserves to be called the main line (instead of 3...Bf5). After, for example, 4.dxc5 Nc6 5.Bb5 e6 6.Be3 Nge7 7.c3 Bd7 8.Bxc6 Nxc6 9.f4 g5! I'm not convinced that White can prove any advantage (can anyone convince me otherwise?), e.g. 10.fxg5 Nxe5 11.Nf3 Nxf3+ 12.Qxf3 Bg7 13.0-0 0-0 14.Nd2 Bb5 with compensation for the pawn (as given on ChessPub). I think I would prefer Black in this position.

So in the above line, how about 6.Qg4!? (instead of 6.Be3) as a way for White to try and play for an edge? This move is mentioned on ChessPub, but without any follow up. Does anyone have any games or analysis with this move?

I think that 6.Qg4 is more ?! than !? Black plays 6.--h5 and White is in trouble with his queen. 7.Qg3 is lost after 7.--Qa5 8.Nc3-d4 and so White has nothing better than something like 7.Bxc6 - bxc6 8.Qb4-a5 and I like blacks position. Perhaps a bit better is 7.Qb4-Nge7 8.Nf3-Ld7 9. Qa3-Ng6 10.Bxc6-Bxc6 11.0-0-Qc7 but black has no problems and on the long run with the bishops the better prospects.
Perhaps you can show me something better for white.

@ Paul Cumbers
Instead 10...Nxe5, 10...h6 "à la Benkö" (Arkell) may be an improvment ...

About 3... c5, in the latest NIC yearbook the plan with 4. c4/4. Nf3 is discussed and seems the new big threat for Black.  Check out the game Rublevsky-Asrian.