From info!dregis Thu Aug 15 14:52:58 BST 1996 Article: 2780 of rec.games.chess.analysis Newsgroups: rec.games.chess.analysis Path: info!dregis From: dregis@exeter.ac.uk (D.Regis) Subject: Re: OEU2200 Book Analysis of Blackmar-Diemer Gambit Message-ID: Organization: University of Exeter, UK. References: <320830ba.13466786@news.crown.net> <320c1d80.3169885@news.crown.net> Date: Thu, 15 Aug 1996 11:58:48 GMT >BLACKMAR-DIEMER GAMBIT The material below is Ryan's (RR), edited by me (DR) and with comments based on Gary Lane's book (GL). [To find out what I've added either run Unix diff or grep for GL/DR or just print them both out single-sided and hold them up to the light!] The GL book I found maddening - see separate post. All unattributed text is Ryan's/MCO/BCO 1(?) It would be helpful if Ryan or someone else with these books could mark up the lines. 1.d4 d5 2.e4!? (I give the move e4 !? because this opening is under a persistent cloud.) (0) Attempts at avoiding the Gambit after 1.d4 d5 2.e4!? (In practical play Black often tries to avoid the Gambit with 2...e6, the French Defence, or 2...c6, The Caro-Kann. The French may be met by 3. Be3, the Alapin Gambit. DR) 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 (0A Popiel's Lember Counter Gambit 3...e5 is met by Be3 exd4 5.Bxd4! Nc6 6.Bb5 Bd7 7. Nge2 Nxd4 (7...Qh4 = GL) 8.Qxd4 c6 9.Bc4 Nf6 10.0-0-0 Be7 11.Rhe1 0-0 12.Ng3 with an advantage for white.) (0B 3...Nc6 leads to a well-known line of the Nimzovitch Defence) (0C 3...e6 offers transposition to the Rubinstein French 4. f3) (0D 3...c6 offers transposition to the main lines of the Caro-Kann: 4. Bc4 Nf6 5. f3 keeps the Gambit offer going. ) 4.f3 (1) The Gambit Declined (2) The Gambit Accepted (1) The Gambit Declined A 4...Bf5 {Vienna Defence} (also known are: B. 4...e3 C. 4...Nf6 D. 4...Nc6) 5.fxe4! (5.g4 Bg6 6.h4 (6. g5 GL) 6...h6 with an unclear position) 5...Nxe4 (5...Bxe4 GL) 6.Qf3 Nd6 (6...Nxc3 7. bxc3 Qc8 GL) 7.Bf4 e6 (Unzicker) 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 (Strobel) 9...Bg6 10.Qe3 Be7 11.Nf3 Nd7 12.d5 cxd5 13.Nxd5 exd5 14.Bxd6 Rc8 (14...Be6 GL) 15.Rxd5 Bxc2 16.Kd1 with slightly better chances for white.) (2) The Gambit Accepted 4...exf3 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 (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. Leisebein-Petzold (Corr 1989) went only as far as 15...Nd6 16. Qe2 1-0 GL) 12.c3 Bxc3(? GL) (12...g5 (! GL) 13.Qe3) 13.bxc3 Qxc3+ 14.Kd1 with an advantage for white) 8.Qf3 c6 (8...Nbd7 GL) 9.g5 Ng8 (Taimanov) (9...Nd5) 10.Bd3 Qxd4 11.Nxg6 hxg6 12.Bf4 c5 (typo? 12...Bc5 is given by GL) 13.Rf1 e5 14.Qe2 Ne7 15.Bxe5 Qe3 16.Qxe3?! (16.Ne4 += GL) 16...Bxe3 with an unclear position) A2. 5.Nxf3 Bg4 5.Nxf3 Bg4 (Other defenses are: 5...e6 6.Bg5 h6 (or...c5) 7.Bxf6 Qxf6 (GL gives 8. Qd2 and 8. Bb5+ as better) 8.Bc4 Bd6 9.0-0 Qd8 10.Qe2 advantage for white. 5...g6 6.Bc4 (not e4! DR) 6...Bg7 7.Ne5 (GL gives 7. Bg5 and 7. 0-0 0-0 8. Qe1) 7...0-0 8.Bg5 Nd7 (8...Nc6 9.Nxc6 bxc6 10/11. Qd2/0-0-0 advantage for white - RR, = GL as in a Diemer-Studier game) 9.0-0 c6 10.Kh1 (?! GL) (10. Bb3 GL) 10...Nb6 11.Nb3 a5 =) 6.h3 Bxf3 7.Qxf3 c6 8.Be3 e6 9. Bd3 and now: 9...Be7 10.g4 Nd5 11.Rf1 0-0 12.Ne4 Nd7 = 9...Nbd7 10.0-0 Be7 11.Rf2 Qa5 12.g4 0-0 = B. 5.Qxf3 5.Qxf3 g6 (5...Qxd4 is double-edged and not fully explored 6.Be3 (6.Nb5 Qe5+ 7.Be2 Na6 with the advantage to white) 6...Qb4 (? GL) (6...Qg4! e.g. 7. Qf2 e5 8. a3 Nc6 9. Nf3 Bd6 10. 0-0-0 a6 GL) 7.a3 (7. 0-0-0 e.g. 7...Bg4? 8. Nb5!! GL) 7...Qb6 8.Bc4 Bg4 9.Qg3 Nxc6 with an unclear position.) 6.Be3 (6...Bg7 7. 0-0 GL) 6...c6 7.Bc4 Bg7 8.Nge2 Nbd7 9.0-0-0 Nb6 10.Bb3 a5 11.a3 Bg4 with advantage to black) ==================================================================== Bibliography: BCO Batsford Chess Openings, first edition, Kasparov/Keene (Batsford) MCO Modern Chess Openings, 11th edition, Korn (). GL The Blackmar-Diemer Gambit, Gary Lane (Batsford). -- 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