Sunday, March 31, 2013

An alternative, but incorrect move order

Playing with the black pieces, my friend faced an unusual Blackmar Diemer opening last friday in our teammatch. The move order was as follows : 1.d4 Nf6 2.f3 d5 and now the surprising 3.Nc3!! (diagram)

Play continued 3...Bf5 and a Vienna game appeared after 4.e4 dxe4 5.fxe4 Nxe4 6.Qf3.

Personally, I have never seen this move order, with 3.Nc3 preceding 3.e4 in the Paleface. But can black take advantage of this rather strange move order ? Immediately after the game, I suggested 3...c5 (diagram) and my silicon friend agrees.

The f3 pawn now looks rather silly, unless of course white pulls off 4.e4 anyway. But this seems to give black the advantage after 4.e4 cxd4 5.Qxd4 Nc6 6.Bb5 Bd7 and black is doing great.

So the suggested move order 1.d4 Nf6 2.f3 d5 3.Nc3 is refuted by an immediate c5 as the white f3 pawn is useless.

Monday, March 18, 2013

The Sneiders Attack - refuted.

Black does not have to be cooperative when defending against the Blackmar Diemer gambit - a timely e5 can destroy white's ambitions 1.d4 d5 2.e4 dxe4 3.Nc3 e5! White has three options now : 4.Nxe4, 4.Nge2 and 4.Qh5 (diagram). We will analyse the Schneiders Attack today.

Can black take a second pawn an survive ?? If so, we should not consider the Schneider Attack anymore since it is well known that 4...Nc6 is also quite strong,

Let's look at 4...exd4 ( realising that black can take the pawn with the queen also, maybe even stronger than the text move ). I guess the only serious white option is 5.Bc4 (diagram), since both 5.Nxe4 and 5.Qe5 are countered by 5...Qe7.

Play continues 6.Bg5 Nf6 7.Bxf6 Qxf6 8.Nxe4 Qe7.
Black might have other options here, such as 8...Bb4+ 9.c3 Qf5 resulting in equal play.

And now the killer move 9.000 (diagram)

Black is a pawn ahead, so he doesnt have to take the piece that is offered to him, eg 9...g6 10.Qe2 Bh6+ 11.Kb1 Nc6 with equality.

But what happens if black does take the baite ? 9...Qxe4 10.Qxf7+ Kd8 11.Nf3.

Scheerer suggests 11...c5 only, indicating that 11...Bd6 was suggested by Kaissiber.

11...Bd6 12.Qxg7 and now a nice improvement 12....Rf8 (diagram)

Kaissiber suggested only 12...Re8, but the text move is better.

a/ 13.Ng5 Qf4+ 14.Kb1 Qf6 15.Nf7+ Rxf7 16.Qxf7 Qxf7 17.Bxf7 c5 (=)

b/ 13.Nxd4 Qe7 (=+)

c/ 13.Rxd4 Qe7 (=+)

d/ 13.Rhe1 Qf4+ 14.Kb1 Qf6 (=+)

e/ 13.Qxf8+ Bxf8 14.Rxd4+ Qxd4 15.Nxd4 (=+)

See we see that there is no advantage for the attacker in the Sneiders Attack.

Thursday, March 7, 2013

A man with a mission

In column "A subtle difference" we looked at the subtle difference between the Teichmann and Gunderam lines. A small difference indeed, but with important consequences. We learned that, in the Gunderam, white should refrain from the normal "Teichmann" continuation 12.00 and choose 12.Rf1 (diagram) instead in the position occuring after 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bf5 6.Ne5 e6 7.g4 Bg6 8.Qf3 c6 9.g5 Nd5 10.Bd3 Qc7 11.Bxg6 hxg6.

It seems to me that black's only reply is 12...Bb4 13.Bd2 00 14.Nxd5 Bxd2 15.Kxd2 cxd5 16.Nxg6 (diagram)

All of these moves seem to be forced for black, so let's look at the above position :

a/ 16...Nc6 17.Nxf8 Nxd4 18.Qd3
...a1/ 18...Qxh2+ 19.Kd1 (=)
...a2/ 18...Nf5 19.Nxe6 (+=)

b/ 16...Rc8 17.Ne5
...b1/ 17...Qxc2+ 18.Ke3 Qf5 19.Qxf5 exf5 20.Rxf5 (=)
...b2/ 17...Nc6 18.Qxf7+ Qxf7 19.Nxf7 Nxd4 20.c3 (=)

c/ 16...Re8 17.Ne5 Nc6 18.Qxf7+ Qxf7 19.Nxf7
...c1/ 19...Re7 20.g6 Nxd5 21.Rae1 (+=)
...c2/ 19...Rf8 20.g6 Nxd5 21.Rae1 (+=)
...c3/ 19...Nxd5 20.Rae1 (+=)

Seems like interesting positions for players with a mission !