# Blackmar-Diemer Gambit, Teichmann Defence Declined

BLACKMAR-DIEMER GAMBIT, TEICHMANN DEFENCE DECLINED

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 (exf3 5.Nxf3 Bg4)

 INDEX 1. Introduction 2. Game with analysis 3. Complete text of the analysis of the game 4. Conclusion 5. Other blogs of mine on this opening

1. Introduction

The Teichmann Defence is a very common defence to the Blackmar-Diemer Gambit (BDG). After 6.h3 black has to decide if he wants to keep his LSB (declining variation) or trade it for the white Knight on f3 (accepted variation). In this game black declines it and moves his LSB to h5. After that white will continue to expand on the kingside with 7.g4, trying to bring the Queen to f3 where it will put pressure on the b7-square and create tactical threats against the f7-square.

2. Game with analysis

3. Complete text of the analysis of the game

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3

The Blackmar-Diemer Gambit (BDG).

4...exf3 5.Nxf3

An alternative: 5.Qxf3, the BDG-Ryder Gambit. In this variation white puts his d-pawn for sale. It can be a lot of fun, because of the many traps in this opening, but I prefer 5.Nxf3.

5...Bg4

The BDG-Teichman Defence. At this point there are many possibillities for black, for example: 5...Bf5 (BDG-Gunderam Defence), 5...c6 (BDG-Ziegler Defence) or 5...e6 (BDG-Euwe Defence); other continuations are possible too.

6.h3

Immediately forces black to make a decision if he wants to hold on to his LSB or not.

6...Bh5

The BDG-Teichman Defence, Declined. A retreat on the diagonal c8-h2 doesn't seem logical as it loses a tempo.

7.g4 Bg6

I don't think the alternative 7.Nxg4 will bring anything. 8.hxg4 Bxg4 9.Be3 e6 10.Qe2 Nd7 11.Bh3 Bxh3 12.Rxh3 and white is better.

8.Ne5

8...Nbd7

Black prepares to exchange the dominant Knight to dimminish the white's attack. One alternative is 8...e6 9.Bg2 (or perhaps 9.Qf3) c6 10.Bg5 Nbd7 11.Qe2 Bb4 12.0-0 Qb6. Another alternative is 8...c6 9.h4 e6 10.h5 Be4 11.Nxe4 Nxe4 12.Qf3 Nf6 13.Be3 Qa5+ 14.c3.

9.Qf3 c6

If 9...Nxe5 10.fxe5 Nd7 11.Qxb7 (interesting is 11.e6 to frustrate black's development further.) Rb8 12.Qxa7 e6 13.Bb5 white is better.} 10.Nxg6 hxg6 11.g5 Nh5 {An alternative is 11...Nh7.

12.Bc4

Now the black Knight is gone from f6, white puts pressure on the f7-square.

12...e6 13.Rf1

Just keep putting pressure on the f7-square.

13...Qe7 14.Bd2

After a series of forceful moves, white has managed to push black in defence-mode where black's pieces are awkwardly placed.

14...Nb6

An alternative is perhaps 14...f5 15.0-0-0 e5 16.Rfe1 0-0-0 17.dxe5 Nxe5 18.Qf2 Qc7 19.Bb3 and white slightly better.

15.Bb3

Personally I like my LSB on the diagonal a2-g8, putting pressure on the f7-square; but the alternative was perhaps 15.Bd3.

15...f5

An alternative is 15...Nd5 16.0-0-0 Nxc3 17.Qxc3 0-0-0 18.Rf3 Kb8 19.Rdf1 f5 20.Re1 Rd6 21.Qe3 Qd8 22.c3 and white is better.

16.0-0-0 0-0-0 17.Rfe1 Rd6

An alternative is 17...Nd5 18.Nxd5 cxd5 19.Kb1 Qd7 20.c4 and white is better.

18.Ne2

Not good. The idea was to get the Knight to the f4-square and attack e6 and g6. Furthermore white threatens to play 19.Bb4; if black trades the Knight with his Knight on h5, my Bishop would get a more active square on the board. But that plan is doomed to fail after 18...Nd5 19.Nf4 Ndxf4 20.Bxf4 Nxf4 21.Qxf4 Rxh3 and black is better. And the threat to play to Bishop to b4 fails to Qxg5. Better is 18.Qe3 Kb8 19.Bxe6 Qc7 20.a4 a5 21.Qe5 and white is better.

18...Qd7

Not good! Better is 18...Nd5 19.c4 Nc7 20.c5 Rd8 21.Nf4 Nxf4 22.Bxf4 Nd5 23.Re5 and it's equal.

19.Nf4

Perhaps better is 19.c4 Na8 20.c5 Rd5 21.Bxd5 Qxd5 22.Qxd5 exd5 23.Ng1 and white is clearly better.

19...Nd5

Not good and too late! Better is 19...Nxf4 20.Bxf4 Nd5 21.Bxd6 Bxd6. 22.Kb1 and white is better. Now black loses immediately.

20.Nxg6

Black resigned. Black can't defend his Bishop on f8, his Rook on h8 and his Knight on h5 all at onces.

1-0

4. Conclusion

A good game on both sides (when we don't count move 18 and 19). From the start white dominates the game. The BDG gives a pawn for the initiative, and gets an attack and the game.

5. Other blogs of mine on this opening

Click on the link to go to my blog.