1 e4 e5 2 Nf3 Nc6 3 c3 Nf6 4 d4 Nxe4 5 d5 Ne7 6 Nxe5 Ng6 7 Nxg6 hxg6 8 Nd2! GM Tony Kosten analyzed this move in his June 2007 Chesspub. update. The move might not look like anything special at first but once you see the variations you'll hopefully appreciate the subtleties of this move and agree with me that it's actually a great move that gives White a slight advantage. Black's position is passive and has to worry about the safety of his king. Even if it's not better for White, White has the easier position to play and it's actaully very tricky for Black to meet correctly if he's unprepared.
In the thread "Beating the Open Games 2nd Edition" (
http://www.chesspub.com/cgi-bin/yabb2/YaBB.pl?num=1214079417/15) (which is locked and is why I can't post this there) GM Jacob Aagaard said it was just a random move in response to why Mihail Marin didn't adress this in the 2nd edition of "Beating the Open Games". He tried to give improvements to Tony's analysis to support his claim but Tony said "I don't think it is as easy for Black as Jacob seems to think" and I don't think his analysis is very strong.
I'm not a subsriber to Chesspub. anymore so I don't have Tony's analysis but most of the following is my attempt to refute Aagaard's analysis and I think most of the moves he gave are moves that Tony didn't mention so it doesn't matter that I don't have Tony's analysis.
a)
8...Nxd2 9 Bxd2 now:
a1)
9...Bc5 10 Bd3 (Tony said "Maybe 10 Qf3 is even more accurate")
10...d6 11 Qf3 Qh4 12 0-0-0 Bg4 13 Qe4+ Kf8 14 f3 Bd7 Aagaard assesses this position = but I think White is slightly better, for example,
15 Qxh4 Rxh4 16 Rde1 Rh5 17 c4 c6 18 b4 Bf2 19 Re2 Bg3 20 dxc6 Bxc6 21 h3 d5 22 c5 d4 23 Kb2 Re8 24 Rxe8+ Kex8 25 Kb3 += a2)
9...Bd6 10 Qg4! += a3)
9...b6 10 Qf3! Bd6 (10...Qf6 11 Qxf6 gxf6 12 Bf4 +=)
11 0-0-0 Bb7 (Black's last 2 moves can be reversed)
12 h4! Qf6 (12...Rxh4 Bb5!)
13 Qxf6 (13 Qe4+ Qe7 14 Qa4 Bxd5 is an interesting gambit that is unclear but at least = for White. 15 Re1 Be6 16 Bd3)
13...gxf6 14 Be3 += b)
8...Nc5 9 Nf3 += c)
8...Nf6 9 Nc4 Qe7+ (9...d6 10 Be2 Be7 11 0-0 0-0 12 Re1 Re8 Aagaard says this position "is not giving White anything to speak about. Fritz is wrong here, for once. But yes, it does look a bit passive." However, Rybka 3 also likes White and I think Black's passivity is exactly what White a small advantage)
10 Be2 b5 11 Ne3 Bb7 (11...Qe5 12 g3! Bb7 13 0-0 Bc5 14 Bf3 0-0 15 a4 +=)
12 0-0 Qc5 Aagaard says this position "looks very unclear to me, and in no way worse for Black". It's a very interesting position but I think it's slightly better for White after
13 h3! Bd6 14 a4 a6 15 Bf3 0-0 16 Qd3 Be5 17 Re1 +=