From: perlman@qso.Colorado.EDU (Eric S. Perlman)
Subject: Re: Query on particular Anglo-Benoni
Organization: University of Colorado, Boulder
Date: Mon, 23 Nov 1992 20:14:13 GMT

In article <92328.094855U13054@uicvm.uic.edu> Howard Wachtel <U13054@uicvm.uic.edu> writes:
>In article <18NOV92.01955751.0044@music.mus.polymtl.ca>,
>HS99@music.mus.polymtl.ca (S. Guimont) says:
>>
>>Hi,
>>   I try to find some documentations and games about that particular
>>anglo-benoni openning :
>>
>> 1.  c4   c5
>> 2.  d4  Nf6
>> 3. Nf3  cd4
>> 4. Nd4   e6
>> 5.  g3  Qb6
>>         ===
>
>   The move 5...Qb6 is given as a side line in Paul Janicki's book on
>the Two Knights Anglo-Benoni.  Strangely enough, all variants seem to
>favor Black!  Janicki's main game is Sosonko-Suba (Informant 39 game
>#67) which continued 6 Bg2 Bc5 7 e3 Nc6 8 Nb3 Bb4+ 9 Bd2 Ne5 10 Qc2 d5
>11 cd5 Qa6! 12 Bxb4! (a game with 12 Bf1 is also given--see Informant
>37 game #42) Nd3+ 13 Kd2 Nxb4 14 Qc3 Nbxd5 15 Qd3 Qxd3+ 16 Kxd3 b6 and
>Black has the initiative.  I'd be interested to know if White has any
>improvements.  It's surprising that this line is not seen more often.

Aside from the fact that the 2nd and 3rd moves are usually reversed,
this line is a very interesting one.  I don't have Janicke's book, but I
do have Watson's revised (1988) book on the Symmetrical English.  Watson
also gives it as a side line.

Watson spends about 1.1 columns - over half a page - on it, and I
am taking the liberty of reproducing salient parts of it.  Watson gives
6.Bg2 Bc5 7.e3 Nc6, and now instead of 8.Nb3, which he also agrees is ok
for Black (he marks it as =/unclear with roughly the same analysis as
Janicke), he believes that the critical lines are the gambits 8.O-O!?
and 8.Nc3 (which he gives an exclam to).  The two mainly transpose, but
8.Nc3 has the virtue of avoiding the move-order 8...Bxd4 9.ed Qxd4
because of 10.Nb5!.  Using the 8.O-O move order, Watson's analysis
continues (p.185):

8...Nxd4! (8...O-O? 9.Nc3+/-; 8...Bxd4 9.ed Qxd4 10.Qxd4 Nxd4 11.Nc3
Ke7!? - 11...d5!? Nogueiras - 12.Rd1 Nc6 13.b3! a5 14.Bf4! Ne8 15.Rd2 f6
16.Rad1 Ne5? 17.Bxe5 1-0 Nogueiras-Am. Rodriguez, Havana 1986. 8.Nc3
avoids this) 9.ed Bxd4 10.Nc3 (with the idea Na4)  (diagram)

10...e5 (10...Bxc3?! 11.bc and Ba3; 10...Be5 11.Re1 Bb8 12.Nb5+/- Nogueiras) 
11.Nb5 O-O! (11...Bc5 12.Bg5 O-O 13.Qd2 h6 14.Bxf6 Qxf6 15.b4 Be7 
16.Nc7 Rb8 17.Nd5 Qg5? - 17...Qe6 18.f4! - 18.f4 ef 19.Qxf4 1-0 
Rogers-Suba, Szirak IZ 1986) 12.Nxd4 (12.a4 Bc5! 13.a5 Qd8 14.Nd6 Bc7 Psakhis) 
ed, Nogueiras-Psakhis, Szirak IZ 1986.  Now 13.Qd3 d5! 14.cd Rd8! (14...Bg4
15.h3 Bh5 16.f4!; 14...Qc5 15.Bg5!, e.g. 15..Nxd5 16.Rac1 Qa5 17.Qxd4
Nb6 18.Bf6! gf 19.Rc5) seems to hold, e.g. 15.Re1 h6! etc.  The game
went 13.b3 d5 14.Bb2 (14.cd Bf5! 15.Bb2 d3; 14.Ba3 Re8 15.c5 Qa5 16.Bb2
Qxc5 17.Bxd4=) 14...dc 15.Qxd4 cb 16.Qxb6 ab 17.ab Be6 18.Bxb7=.

I should also mention that Adorjan-Zysk, Dortmund 1984 had a similar
variation, but with 3.Nc3 Nc6 and only then 6.g3 interspersed, as did
the 26th match game of the first K-K encounter.  That's another can of
worms.  Anyway, the operative informant code here is A32.

This sounds like one that our resident IM, Mark Ginsburg, could comment
on:  ideas!?
-- 
"How sad to see/A model of decorum and tranquillity/become like any other sport
A battleground for rival ideologies to slug it out with glee." -Tim Rice,"Chess"
     Eric S. Perlman 				 <perlman@qso.colorado.edu> 
  Center for Astrophysics and Space Astronomy, University of Colorado, Boulder