Teichmann defense - continued.

Last week we learned that black can achieve a better position in the Teichmann Defense after the moves 1.d4 d5 2.e4 dxe4 3.Nc4 Nf6 4.f3 exf3 5.Nxf3 Bg4 6.h3 Bh5 7.g4 Bg6 8.Ne5 e6 9.Qf3 c6 10.g5 Nh5 as 11.Bd3 Qxd4 12.Nxg6 fxg6 13.Qg4 gives the defender a small advantage.

In my quest to find an theoretical equalizing line, I conclude the old 9.Bg2 c6 10.h4 (diagram) is the only candidate.

Black is forced to seek a place for his bishop, which can be done indirectly only through 10...Bb4. My silicon friend now gives 11.Bg5 as best, and completely equal after 11...h6 12.Nxg6 fxg6 13.Bxf6 (=), but I will discuss 11.00 today (diagram). White risks all to trap an enemy piece.

a/ 11...Bxc2 12.Qd2 (diagram)

...a1/ 12...00 13.Rf4
......a1a/ 13...Ba4 14.Qe3 Bxc3 15.bxc3 (=)
......a1b/ 13...Bg6 14.h5 Nxh5 15.gxh5 Bxh5 16.Qe3 (=)
......a1c/ 13...Bxc3 14.Qxc3 (=)
......a1d/ 13...Nxg4 14.Qxc2 (+=)
...a2/ 12...h6 13.Rf2 Bg6 14.Nxg6 fxg6 15.g5 hxg5 16.hxg5 Nd5 17.Qe2 (+=)
...a3/ 12...Bg6 13.h5 (+=)
...a4/ 12...Be4 13.Nxf7!! Kxf7 14.Bxe4 (+=)

b/ 11...00 12.Rf2!! (diagram)

...b1/ 12...Bxc3 13.bxc3 Ne4 14.Rf3 (=)
...b2/ 12...h5 13.g5 (=)
...b3/ 12...h6 13.g5 hxg5 14.hxg5 (+=)
...b4/ 12...Nbd7 13.Nxd7 Qxd7 14.h5 Bxc3 15.bxc3 Be4 16.g5 Bxg2 17.gxf6 (+=)

c/ 11...Nbd7 12.Qe2 (diagram)

...c1/ 12...Nxe5 13.dxe5 (=)

...c2/ 12...00 13.h5 (=)

...c3/ 12...Qb6 13.Be3 (=)

...c4/ 12...Qc7 13.h5 (+=)

...c5/ 12...Qa5 13.Nxd7 (+)

So, if white wants a (theoretically) safer alternative than 9.Qf3 c6 10.g5 Nh5 11.Bd3, it is obvious 9.Bg2 is a serious option - as none of black's options seem to give ab advantage to the defender.

Disaster - I was wrong !!!!

Following an embarassing defeat in a blitx game, I decided to look up again the lines occuring in the Teichmann 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 Nh5 (diagram)

I had shown before that 11.Bd3 is best and gave the line 11.Bd3 Qxd4 12.Nxg6 hxg6 13.Rf1.

But now, oh horror, I see there is a small problem with this as I forgot about 11.Bd3 Qxd4 12.Nxg6 fxg6. It now seems black is equal, maybe even better, as the move I suggested in my book 13.Qg4 (diagram) is not winning.

a/ 13...Bc5 14.Bd2 

...a1/ 14...Qf2+ 15.Kd1 16.Nd7 (=+)

...a2/ 14...00 15.Qxe6+ Kh8 16.000  (=)

...a3/ 14...Qe5+ 15.Ne4 (=)

...a4/ 14...Nd7 15.Qxe6+ Kd8 16.000 (=)

b/ 13...Qe5+ 14.Kd1 (=)

c/ 13...Qb4 14.Be3 (+=)

d/ 13...Qd6 14.Ne4 (=)

So the line 11.Bd3 Qxd4 12.Nxg6 fxg6 13.Qg4 seems to be better for black after 13...Bc5 14.Bd2. The problem is that white does not have much alternatives after having played 11.Bd3. 

Back to the drawing table !!!

Plusses all the way.

My last post "So complicated" focused on the lines occuring after 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4 Qxd4 5.Bd4 f5 6.Nf3 when black replies something different from 6...Qb6. We learned that black cannot get any advantage and that white is better in most lines.

Today we focus at black's strongest move 6...Qb6. White retreats the night back 7.Nc3 (diagram). This may seem a waste of time, but white now attacks both the pawn on e5 and the important square d5.

Black has several replies, but only the immediate 7...e4 offers equalising chances. Let's look at the other lines.

a/ 7...Nf6 8.Nxe5
...a1/ 8...Nbd7 9.Nf3 (+=)
...a2/ 8...Nc6 9.Nxc6 bxc6 10.00 (+)
...a3/ 8...Be7 9.00 (+)

b/ 7...Bd6 8.Qe2
...b1/ 8...e4 9.Bc4 (+=)
...b2/ 8...Nd7 9.Bxf5 (+=)
...b3/ 8...Nc6 9.Bb5 (+=)
...b4/ 8...Ne7 9.Nxe5 (+=)

c/ 7...Nd7 8.Bxf5 (+=)

d/ 7...Nc6 8.Bc4 Nf6 9.00
...d1/ 9...Qc5 10.b3 (+=)
...d2/ 9...Bd7 10.Ng5 (+=)

...d3/ 9...Bd6 10.a3 (+=)

...d4/ 9...Bc5 10.Nd5 (++)

...d5/ 9...Be7 10.Nd5 (+)

...d6/ 9...e4 10.Nd5 Nxd5 11.Qxd5 Nd8 12.Qe5+ (+=)

So we have to conlcude that black's only chance for equalizing is the advance of the e-pawn, putting him even further behind in development. White now castles 7...e4 8.00 (diagram), offering black a piece.

e/ 7...e4 8.00 exf3 9.Re1+ Ne7 10.Nd5 (+)

f/ 7...e4 8.00 exd3 9.Re1+ Ne7 10.Nd5 (+=)

g/ 7...e4 8.00 Nf6 9.Bc4 (diagram)

...g1/ 9...Nc6 10.Nd5 Nxd5 11.Qxd5 Nd8 12.Qe5+ (+=)
...g2/ 9...Nbd7 10.Qe2 (+=)

...g3/ 9...Be6 10.Na4 (+=)

...g4/ 9...Be7 10.Ng5 (+=)

...g5/ 9...Bd6 10.Ng5 (+=)

...g6/ 9...Bc5 10.Nd5 (+=)

...g7/ 9...Qc5 10.Bb3 (+=)

h/ 7...e4 8.00 Ne7 9.Re1 (+=)

i/ 7...e4 8.00 Nd7 9.Nd5 Qc5 10.c4 (diagram) 

...i1/ 10...exf3 11.b4 (+=)

...i2/ 10...exd3 11.Re1+ Be7 12.Qxd3 (+)

The line  1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4 Qxd4 5.Bd4 f5 6.Nf3 Qb6 was often considered to be better for black. However, my analysis proves the opposite. There is no equal sign to be seen in the above analysis. Does this mean white will always win ? No, it just means the Blackmar Diemer is a sound opening that cannot be refuted in any way.

So complicated

Following up on my last post, what if Black does not retreat the queen to his home location after 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4 Qxd4 5.Bd3 f5 6.Nf3 (diagram). Today we will list all possibilities other than 6...Qb6 ( which we will cover next blog ).

Let's start at 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4 Qxd4 5.Bd3 f5 6.Nf3 (diagram)

a/ 6...Qb6 7.Nc3( coverer next time ).

b/ 6...Qd7 7.Neg5 (diagram)

...b1/ 7...Nc6 8.Qe2 (=)
...b2/ 7...e4 8.Ne5 (+=)

...b3/ 7...Qd6 8.Qe2 (=)

...b4/ 7...Bd6 8.Bc4 (+=)

...b5/ 7...Qe7 8.00 (+)

c/ 6...Qb4+ 7.Bd2 (diagram)

...c1/ 7...Qxb2 8.Rb1 

......c1a/ 8...Qxa2 9.Nxe5 (+)

......c1b/ 8...Qa3 9.Nxe5 fxe4 10.Bb5+ (+=)

...c2/ 7...Qe7 8.Nc3 (=)
...c3/ 7...Qb6 8.Nc3 (+=)

d/ 6...Qd8 7.Neg5 The Latvian-Blackmar-Diemer

...d1/ 7...e4 8. Ne5 (+=) 

...d2/ 7...Nc6 8.Qe2 (=)

...d3/ 7...Bd6 8.Bc4 Nh6 9.Ne6 Bxe6 10.Bxe6 (+=)

...d4/ 7...Qd6 8.Qe2 (+=)

...d5/ 7...Qf6 8.00 (+=)

...d6/ 7...Qe7 8.00 (+)

e/ 6...Bb4+ 7.c3 (+=)

f/ 6...Qd5 7.Nc3  (+=)

g/ 6...Qa4 7.Nc3 (+=)

So complicated !!