Friday, July 15, 2011

When the need is high, rescue is at hand.

The Kloss variation in the Bogoljubow defense has often been quoted as one of the reasons why white should avoid the Studier attack.

1.d4 Nf6 2.Nc3 d5 3.e4 dxe4 4.f3 exf3 5.Nf3 g6 6.Bc4 Bg7 7.00 00 8.Qe1 Nc6 9.Qh4 Ng4 !!
Black directly attacks the d4 pawn.

10.Bf4 Bxd4+ 11.Kh1 Bf6 12.Bg5

The only way for black to get an advantage. 13.Ne3 gives no advantage at all.

Scheerer now gives 13.Rad1 Qe8 14.Nd5 as winning for white, but blacks strongest reply 13...Qc8 gives black the upper hand.

Instead 13.Bxf6 seems to give white a complete equal game :

a/ 13...Nxf6 14.Ng5
a1/ 14...h5 15.Rxf5 gxf5 16.Rd1 Qe8 17.Nf3 with complete equality
a2/ 14...Kg7 15.Rad1 =
a3/ 14...Ne5 15.Rad1 Qe8 16.Rde1 +=
a4/ 14...Qd4 15.Rf4 +
a5/ 14...Bxc2 15.Rxf5 ++
a6/ 14...Nd4 15.Rd1 ++
a7/ 14...e6 15.Rd1 +

b/ 13...exf6 14.Rad1
b1/ 14...Qe7 15.Nd5 Qc5 16.h3 =
b2/ 14...Qe8 15.Nd5 +
b3/ 14...Qc8 15.Nd5 =
b4/ 14...Qb8 15.Nd5 +=
b5/ 14...Bd7 15.h3 Nge5 16.Nxe5 Nxe5 17.Qg3 +=

Of course black might have other options apart from 10...Bxd4+, but I guess it is clear that this analysis indicates that black wont get an advantage in the Kloss variation.

1 comment:

  1. Great site ! I just found it and will come here regularly.