No country for old men

Some time ago, I looked at the "normal" Teichmann Defense occuring after 1.d4 d5 2.e4 dxe4 4.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4 6.h3 Bh5 7.g4 Bg6 8.Ne5 e6 9.Qf3 c6 10.g5 Nd5 11.Bd3 Nd7 12.Nxg6 hxg6 13.00 Qe7 14.Nxd5 cxd5.

I suggested that 15.Rf2 is the best move, effectively putting this line to rest. I also indicated that 10...Nh5 is a better black defense.

Now there is also the akward 10...Ng8, deliberately giving white the initiative ( and attacking the pawns at d4 and c2 ).

Scheerer describes 11.Bd3 rather extensively. However, when creating my book more than a year ago, it seemed to me that white is worse after the simple continuation 11.Bd3 Qxd4 12.Nxg6 hxg6 13.Rf1 Qh4+

But today, I have been looking deeper in this hugely complex gambitline and I believe it provides white with at least an equal game.

Let's start our analysis by noting that black has no alternative to 11...Qxd4, as 11...Nd7 is effectively met by 12.Nxg6 hxg6 13.Rf1 Qe7 14.Bf4 (+=), for example 14...000 15.Qxc6+ bxc6 16.Ba6#.

Also 11...f5 is met by 12.gxf6 Qxf6 13.Qf3 (+-)

That brings us to 11...Qxd4 12.Nxg6 hxg6 13.Rf1, the starting point of my analysis

a/ 13...f5 14.gxf6 Qh4+ 15.Rf2 Nxf6 16.Bxg6 Kd8 17.Bf4 (+=)

b/ 13...Qe5+ 14.Be3 (+-)

c/ 13...Qd7 14.Bxg6 (++)

d/ 13...Qh4+ ( the main move ) 14.Rf2 Bc5 ( the only move to obtain a potential advantage ) 15.Qxf7+ Kd8 16.Ne4 Bxf2+ 17.Nxf2

...d1/ 17...Ne7 18.Bd2 Nd7 ( only move that does not loose ) 19.000
......d1a/ 19...Rf8 20.Qxe6
........d1a1/ 20...Rxf2 21.Bxg6 Nd5 22.Qe8+ Kc7 23.Qxa8 (=)
........d1a2/ 20...Qxf2 21.Bxa5+ (+=)
........d1a3/ 20...Nd5 21.Ne4 (+)
......d1b/ 19...Nd5 20.Ne4 (+=)
......d1b/ 19...Re8 20.Bxg6 (+)
...d2/ 17...Nd7 18.Bd2
......d2a/ 18...Ne7 transposing above
......d2b/ 18...Kc7 19.Bf4+ (+=)
......d2c/ 18...Qa4 19.Qxg7 (++)
...d3/ 17...Qb4+ 18.Bd2
......d3a/ 18...Qe7 19.Qxg6 (+=)
......d2b/ 18...Qxb2 19.Qf8+ (++)

So black can only obtain a draw in this hugely complex line if he is able to find the correct moves again and again... The Blackmar Diemer is indeed no country for old men, as the movie goes.