Can you believe your eyes ?

Wanted to share something with you that seems too great.

After 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4 6.h3 Bh5 7.g4 Bg6 8.Ne5 e6 9.Qf3 c6 10.g5, black must take an important decision that determines the nature of the game. The most obvious choice is 10...Nd5, after which white continues the fierce attack with 11.Bd3 (diagram).

White once again threatens complete destruction, so black has to act accordingly. Let's look at the black options :

a/ 11...Qc7 12.Bxg6

...a1/ 12...hxg6 13.00 (++)
...a2/ 12...fxg6 13.Qg4
......a2a/ 13...Qc8 14.00 (++)
......a2b/ 13...Qd6 14.Ne4 (++)
......a2c/ 13...Qe7 14.00 (++)
......a2d/ 13...Nxc3 14.bxc3 (+)

b/ 11...Qe7 12.Bxg6
...b1/ 12...hxg6 13.00 (++)
...b2/ 12...fxg6 13.Rf1 (++)


c/ 11...f6 12.Nxg6 hxg6 13.Bxg6+ (++)


d/ 11...f5 12.gxf6
...d1/ 12...Qxf6 13.Bxg6+ hxg6 14.00 Qxf3 15.Rxf3 (+=)
...d2/ 12...gxf6 13.Nxg6 hxg6 14.Bxg6 (+)

e/ 11...Nxc3 12.Bxg6
...e1/ 12...Qxd4 13.Qxf7+ Kd8 14.Bf4 (++)
...e1/ 12...Qd5 13.Bxf7+ (++)

f/ 11...Nd7 12.Nxg6

...f1/ 12...hxg6 13.Nxd5
......f1a/ 13...cxd5 14.00 Qe7 15.Bd2 (+)
......f1b/ 13...exd5 14.00 Qe7 15.Bd2 (++)
...f2/ 12...fxg6 13.00 (+)


So it seems black is busted in all lines. But let's have a further look at one particular line, # f1a (diagram).

I had analysed this position in my book "Attack with the Blackmar Diemer" before and concluded it was roughly equal after 15...f5 16.gxf6 gxf6 17.Bxg6+ Kd8 18.Rf2. But now I see that the odd looking 18.Kh1 (diagram) is given as a win by my silicon friend. What a strange move ! But check out the lines yourself, it does win.

So after some very deep analysis, we have to conclude that 10...Nd5 11.Bd3 wins by force ! Can you really believe this ?