RIP : the "normal" Teichmann Defense

In my book "Attack With the Blackmar Diemer", I had given an "equal" assessment of the "normal" variation in the 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

I showed in an earlier column that 10...Nh5 is much stronger than 10...Nd5, however the latter is more natural and will me played more often by a Teichmann defender.

In my book, I gave the line 11.Bd3 Nd7 12.Nxg6 hxg6 13.00 Qe7 14.Nxd5 cxd5 ( diagram ) as the best option for black, and gave it equality after 15.Bd2

However, it seems that the quiet 15.Rf2 gives white a distinct advantage, eg :

a/ 15...f5 16.gxf6 gxf6 17.Bxg6+ Kd8 18.c4 (+=)

b/ 15...000 16.Qxf7
...b1/ 16...Rxh3 17.Qxg6 (+=)
...b2/ 16...Rh4 17.Kg2 (+=)
...b3/ 16...Qxf7 17.Rxf7 (+-)
...b4/ 16...Rh5 17.Qxg6 (+-)
...b5/ 16...e5 17.Qxg6 (+=)
...b6/ 16...Qd6 17.Kg2 (+-)

c/ 15...Rh5 16.Qg4
...c1/ 16...000 17.Bf4 (+=)
...c2/ 16...Rc8 17.Bd2 (+=)
...c3/ 16...e5 17.Bd2 (+-)
...c4/ 16...Kd8 17.Bd2 (+=)

d/ 15...Rh4 16.Be3
...d1/ 16...e5 17.Qxd5 (+=)
...d2/ 16...000 17.Qg3 (+=)
...d2/ 16...Rh5 17.Kh2 (+=)

e/ 15...a6 16.Bd2 (+=)

f/ 15...Nb6 16.Bf4 (+=)

Interesting to see is that Scheerer gives 15.c4 as the recommended move, as in a Leisebein correspondence game, but Houdini believes 15...Nb6 (=) is better than the suggested 15...dxc4.

So, 15.Rf2 clearly puts the "normal" Teichmann line 14...Nd5 to rest. May it rest in peace.