Blackmar-Diemer Gambit

From info!dregis Thu Aug 15 14:51:18 BST 1996
Article: 10222 of rec.games.chess.misc
Xref: info rec.games.chess.misc:10222 rec.games.chess.analysis:2779
Newsgroups: rec.games.chess.misc,rec.games.chess.analysis
From: dregis@exeter.ac.uk (D.Regis)
Subject: Re: OEU2200 Book Analysis of Blackmar-Diemer Gambit
Followup-To: rec.games.chess.analysis
Organization: University of Exeter, UK.
Date: Thu, 15 Aug 1996 11:56:55 GMT

Before I get stuck in, this thread surely belongs in
rec.games.chess.analysis.  Please follow-up there and not
rec.games.chess.misc. 

I have three follow-ups

1. editing only
2. editing with alternatives given in Gary Lane's book
3. review of GL book

>BLACKMAR-DIEMER GAMBIT

Firstly:

a. can we lay this out more like a tree in a book?  I've had a go!
b. names and references would also be helpful when quoting from other
   sources
c. the size of advantage is important: I suggest the ASCII scale
   =   equal  
   += slight plus
   +/- clear plus
   +-  large plus, probably winning
   &   unclear
   &/= with compensation
d. for consistency, should it be O-O (letters) or 0-0 (zeroes)?

So: all the material below is Ryan's, edited by me
All unattributed text is Ryan's/MCO/BCO 1(?)

1.d4 d5 2.e4!? (I give the move e4 !? because this opening is under a persistent cloud.) 2...dxe4 3.Nc3
(3.f3 is refuted by 3...e5! 4.dxe5 Qxd1+ 5.Kxd1 Nc6 6.Bf4 Nge7 with an advantage for black.)

3...Nf6

(Popiel's Lember Counter Gambit 3...e5 is met by Be3 exd4 5.Bxd4! Nc6 6.Bb5 Bd7 7. Nge2 Nxd4 8.Qxd4 c6 9.Bc4 Nf6 10.0-0-0 Be7 11.Rhe1 0-0 12.Ng3 with an advantage for white.)

4.f3
tSl+jL-t
XxX-XxXx
-+-+-S-+
+-+-+-+-
-+-Px+-+
+-N-+p+-
pPp+-+pP
r-BqKbNr

(1) The Gambit Declined

(2) The Gambit Accepted

(1) The Gambit Declined

A 4...Bf5 5.fxe4!
t+-+j+-t
XxX-XxXx
-+-+-S-+
+-+-+l+-
-+-Pp+-+
+-N-+-+-
pPp+-+pP
r-BqKbNr

(5.g4 Bg6 6.h4 h6 with an unclear position)

5...Nxe4 6.Qf3 Nd6 7.Bf4 e6 8.0-0-0 c6 and now:

9.d5? cxd5 10.Nxd5 Be4
(10...exd5 11.Bxd6 with a better position for white)
11.Qe3 exd5 12.Rxd5 f5 13.Bb5+ Nc6 14.Nf3 Be7 15.Rxd6 Bxd6 16.Rd1 0-0 with an unclear position.

9.g4 Bg6 10.Qe3 Be7 11.Nf3 Nd7 12.d5 cxd5 13.Nxd5 exd5 14.Bxd6 Rc8 15.Rxd5 Bxc2 16.Kd1 with slightly better chances for white.)

(2) The Gambit Accepted

4...exf3
tSl+jL-t
XxX-XxXx
-+-+-S-+
+-+-+-+-
-+-P-+-+
+-N-+x+-
pPp+-+pP
r-BqKbNr

Here are many forks in the road. You can either continue Nxf3, or Qxf3. Both continuations lead to interesting positions which allow for further research and improvements.

1A. 5. Nxf3
A1 5. Nxf3 Bf5
A2 5. Nxf3 Bg4
A3 5. Nxf3 e6
A4 5. Nxf3 g6
1B. 5. Qxf3

A. 5. Nxf3
A1. 5.Nxf3 Bf5

5.Nxf3 Bf5 6.Ne5 e6 7.g4 Bg6
tS-+jL-t
XxX-+xXx
-+-+xSl+
+-+-N-+-
-+-P-+p+
+-N-+-+-
pPp+-+-P
r-BqKb+r

(7...Be4 8.Nxe4
(8.Rg1 Bb4 9.d3 Nc6 10.Be3 Nxe5 11.dxe5 Bxd3=)

8...Nxe4 9.Qf3 Qxd4! 10.Qxf7+ Kd8 11.Qf4 Bb4+
(11...g5? 12.c3 Qd5 13.Nf7+ Ke8 14.Qf3 Rg8 15.Bg2 with an advantage for white)

12.c3 Bxc3
(12...g5 13.Qe3)

13.bxc3 Qxc3+ 14.Kd1 with an advantage for white)

8.Qf3 c6 9.g5 Ng8 10.Bd3 Qxd4 11.Nxg6 hxg6 12.Bf4 c5 13.Rf1 e5 14.Qe2 Ne7 15.Bxe5 Qe3 16.Qxe3?! (16.Ne4) 16...Bxe3 with an unclear position)

A2. 5.Nxf3 Bg4

5.Nxf3 Bg4
tS-+jL-t
XxX-XxXx
-+-+-S-+
+-+-+-+-
-+-P-+l+
+-N-+n+-
pPp+-+pP
r-BqKb+r

(Other defenses are:

  • 5...e6 6.Bg5 h6 (or...c5) 7.Bxf6 Qxf6 8.Bc4 Bd6 9.0-0 Qd8 10.Qe2 advantage for white.
  • 5...g6 6.Be4 Bg7 7.Ne5 0-0 8.Bg5 Nd7
    (8...Nc6 9.Nxc6 bxc6 10.0-0-0 advantage for white)

    9.0-0 c6 10.Kh1 Nb6 11.Nb3 a5 =)

    6.h3 Bxf3 7.Qxf3 c6 8.Be3 e6 and now:
    tS-+jL-t
    Xx+-+xXx
    -+x+xS-+
    +-+-+-+-
    -+-P-+-+
    +-N-Bq+p
    pPp+-+p+
    r-+-Kb+r

  • 9.Bd3 Be7 10.g4 Nd5 11.Rf1 0-0 12.Ne4 Nd7 =
  • 9.Bd3 Nbd7 10.0-0 Be7 11.Rf2 Qa5 12.g4 0-0 =

    B. 5.Qxf3

    5.Qxf3 g6
    tSl+jL-t
    XxX-Xx+x
    -+-+-Sx+
    +-+-+-+-
    -+-P-+-+
    +-N-+q+-
    pPp+-+pP
    r-B-KbNr

    (5...Qxd4 is double-edged and not fully explored 6.Be3
    (6.Nb5 Qe5+ 7.Be2 Na6 with the advantage to white)
    6...Qb4 7.a3 Qb6 8.Bc4 Bg4 9.Qg3 Nxc6 with an unclear position.)

    6.Be3 c6 7.Bc4 Bg7 8.Nge2 Nbd7 9.0-0-0 Nb6 10.Bb3 a5 11.a3 Bg4 with advantage to black)
    t+-+j+-t
    +x+-XxLx
    -Sx+-Sx+
    X-+-+-+-
    -+-P-+l+
    PbN-Bq+-
    -Pp+n+pP
    +-Kr+-+r

    More Blackmar-Diemer Opening

    And More

    And Yet some More

    -- 
    May your pieces harmonise with your Pawn structure and
    your sacrifices be sound in all variations
    
    D  _       
     / "()/~   Dave Regis  &8^D*  WWW: http://www.ex.ac.uk/~dregis/DR/chess.html
    || \_/|    = DrDave on BICS 
    ~\   /                        "...what else exists in the world but chess?"
     _|||__SHEU: ~/sheu.html                                          -- NABOKOV
    
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