Nb5 - it must be right !

last post discussed the line 5...Bg4 6.h3 Bxg4 7.Qxf3 c6 8.g4 Qxd4 9.Be3 Qd6.
It seemed that white can equalise rather easily with 10.g4, but getting an advantage seemed unlikely for either player.

Black can also play more ambituously 9...Qb4 10.000

White's pieces are all ready for the kill, but the black prey keeps on struggling...

a/ 10...Nbd7 11.g5 Ne5 12.Qg3 Nfd7 13.Bd4

...a1/ 13...Qd6 14.Ne4 (+=)
...a2/ 13...Qa5 14.Nb5 (My loverboy - see my previous post) (+=)
...a3/ 13...f6 14.h4 (+=)
...a4/ 13...Nc4 14.Bxc4 Qxc4 15.Qc7 (++)
...a5/ 13...Ng6 14.Qc7 (+)

b/ 10...h6 11.Nb5 (Ahhhh, finally... ) Na6 12.Nxa7

...b1/ 12...Qe4 13.Qxe4 Nxe4 14.Bg2 (+=)
...b2/ 12...Nb8 13.Nb5 (once again) Na6 14.Bd4 (+=)
...b3/ 12...Nc7 13.Nxc6 Qe4 14.Qxe4 Nxe4 15.Na7 (+=)
...b4/ 12...e6 13.Bxa6 Bc5 14.Bxc5 Qxc5 15.Bxb7 (+=)
...b5/ 12...Qa4 13.Bb5 (wow...what a move...black's queen is kicked around all sides) (+)

c/ 10...Qa5 11.g5 Nfd7 12.Nb5 (yep - another appearance)

...c1/ 12...e6 13.Bd4 (+=)
...c2/ 12...cxb5 13.Qxb7 (++)
...c3/ 12...Ne5 13.Qf5 (++)

d/ 10...a6 (preventing Nb5) 11.g5 Nfd7 12.Be2

...d1/ 12...e6 13.Rhf1 (+)
...d2/ 12...Ne5 13.Qg3 (+=)

e/ 10...e6 (black's only good move ) 11.g5 ( diagram )
In my book "Attack with the Blackmar Diemer", I also recommended 11.Nb5, but this leads only to equality after 11...Qa5.

...e1/ 11...Nd5 12.Bd4 (=)
...e2/ 11...Nfd7 12.Bd4 (+=)

So we learn that black, despite his two pan advantage, can only obtain equality in only single line after his reckless pawn grab 5...Bg4 6.h3 Bxg4 7.Qxf3 c6 8.g4 Qxd4 9.Be3 Qb4 10.000. I never came across this move on a serious over-the-board game, but it occurs rather frequent in blitz.