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)
...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.
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