4...f5 not only defends the e4-pawn, but also blocks the b1-h7
diagonal, typically dominated by White's bishop and queen. As a
result, the game is more closed than in other variations, which
probably suits Black, especially if he attempted to play the French
Defence.
The line is a bit similar to the Pöhlmann Defence of the
BDG, which arises after 1.d4 d5 2.e4 dxe4 3.Nc3 f5.
W
|
|
5.f3 (! [Minev];
!? =/~ [ECO])
A) 5...exf3
6.Nxf3 Nf6
- 7.Bf4 Bb4 8.Qa4+ Nc6 9.a3 Bxc3+ 10.bxc3 O-O 11.Rd1 Ne4
12.Qc2 g5 13.Be3 g4 14.Nd2 Qh4+?! 15.g3 Nxg3 16.Bf2 f4 17.Bg2 f3
18.Bf1? (18.hxg3 Qe7 19.Bf1 e5 20.d5 Bf5 21.Ne4) Qh6 19.Rg1 Nxf1
20.Kxf1 (20.Rxg4+ Kh8 21.Nxf1 e5 22.Rh4 Qg7) e5 -/+, 1-0 in 40,
Heikkinen - Sjöberg, 1995.
- 7.Bd3 Nc6
(7...Bb4 8.Qa4+ Nc6 9.a3 Bxc3+ 10.bxc3 Bd7 11.Qc2 O-O 12.O-O Ne7
13.Bg5 h6 14.Bh4 Ng6 15.Bg3 Nh5 16.Be5 Nxe5 17.Nxe5, 0-1 in 32,
Heikkinen - lynx, Zone 1996)
8.Bc2 Bb4 9.O-O Bxc3 10.bxc3 O-O 11.Bf4 Ne7 12.Ne5 c5 13.Qd2 Qa5
14.Qe3 cxd4 15.cxd4 b5 16.Qf3 Ba6 17.Nc6 Nxc6 18.Qxc6 Qb6
19.Qxb6 axb6 draw,
Heikkinen - Haavisto, 1991.
This is very rare game in that it ended in a draw. Elapsed times after
move 8 were White's 3 to Black's 37 (out of 90) minutes, and Black had
got satisfactory play.
- 7.Bg5?! Bb4 8.a3 Bxc3+ 9.bxc3 h6 10.Bh4 g5 11.Bf2 Ne4 12.Ne5
Qf6? 13.Qh5+, 1-0 in 24,
Heikkinen - saladin, Zone 1996.
Alternatives to 6...Nf6 have created lovely miniatures:
- 6...c6 7.Bg5 Be7 8.h4 Bxg5 9.hxg5 Qe7 10.g6 Nf6 11.Ne5 Qb4
12.Nf7 Rf8 13.Rxh7 Qxb2 14.Rc1 Ke7 15.Rxg7 Qxa2?? 16.Nd6+ Kxd6
17.c5# 1-0,
Heikkinen - chn77, Zone 1997.
- 6...Bd7 7.Ne5 Nf6 8.Bg5 Be7? 9.Bxf6 Bxf6 10.Qh5+ Ke7 11.Qf7+ Kd6
12.c5# 1-0, Heikkinen - Ritvanen, 2000.
B) 5...Nf6
W
- 6.Be3 Bb4 (6...Nc6 transposes)
7.Qb3
- 7...Bxc3+ 8.Qxc3 O-O 9.O-O-O Qe7 10.h4 Nbd7 11.h5, 1-0 in 24,
Heikkinen - Pietilä, 1996.
- 7...Nc6 8.O-O-O Bd7? 9.d5 exd5 10.Nxd5 (10.cxd5 Bxc3 11.dxc6
Bxb2+ 12.Qxb2 bxc6 13.Bc5 +/-) a5 11.Nxb4, 1-0 in 25,
Heikkinen - Chessmaster 3000, 1996.
- 6.fxe4 fxe4 is probably =/+, e.g., 7.Bg5 Be7 8.Nge2 c5 9.dxc5
Qa5
[Watson].
- 6.Bf4 c6 7.Qd2 c5 8.d5 exd5 9.cxd5 Bd7 10.O-O-O a6 11.g4 b5
12.gxf5 Bxf5 13.fxe4, 1-0 in 32,
Heikkinen - ricky29, Zone 1996.
C) 5...Bb4 6.Qb3
- 6...Bxc3+ 7.Qxc3 Nf6 8.Be3 O-O 9.O-O-O a5 10.Nh3 a4 11.Be2 Qe7
12.Rhg1 Nc6 13.d5 exd5 14.cxd5 Ne5 15.Bc5, 1-0 in 26, Heikkinen -
Sundsten, 2002.
- 6...c5 7.dxc5 Nc6 8.Be3 e5 9.Rd1 Qe7 10.fxe4 f4, Lund - Heikkinen,
corr. 1999.
D) 5...e5 transposes.
5.Be2
- 5...Bb4 6.Qa4+ Nc6 7.Be3 Bxc3+ 8.bxc3 Nf6 9.f3 O-O 10.Nh3 e5
11.Rd1 Bd7 12.Qc2 exf3 13.Bxf3 e4 14.Be2 Ne7 15.O-O, 1-0 in 48,
Overstreet - Fritz 2, 1995.
- 5...Nf6
- 6.Be3 Bb4 7.g4 O-O 8.g5 Bxc3+ 9.bxc3 Ne8 10.h4? (10.Bf4) f4
11.Bc1 f3 12.Bf1 Nd6 13.Ba3, 1-0 in 31,
Heikkinen - lynx, Zone 1996.
- 6.Bg5 b6 7.Bh5+ g6 8.Be2 Bg7 9.b4 Bb7 10.Rc1 Nbd7 11.Rb1 O-O
12.Bf4 Rc8 13.Qa4 a6 14.a3 Nh5 15.Bxh5 gxh5 16.Rd1 Nf6 17.Qc2
Qe8 18.Nh3 h6 19.O-O, 1-0 in 36, Brause - Nizel, FICS 1996.
In a closed position, White is desperately seeking strategy, or what
else is that rook manoeuvre a1-c1-b1-d1...
5.Bf4 [Schwarz] is a
natural waiting move. Note that the bishop is quite pointless on g5
because h6 cannot be met with Bh4; besides, Nf6 is not a target
because f5 blocks Rf1 out, and prevents Ne4.
- 5...Bb4 6.Qb3 Nc6 7.O-O-O Bxc3 8.Qxc3 g5 9.d5 gxf4 10.Qxh8 Qg5
11.Nh3 Qg6 12.dxc6 bxc6 13.Nxf4 Qg5 14.g3 Ba6 15.h4 1-0, Heikkinen -
Kaiju, 1999.
- 5...Nc6 6.Nge2 Bd7? (6...Nb4 7.Ng3 Qxd4 8.Nb5 -/+, but 6...Bd6 may
be even better) 7.Nb5 Bd6 8.Bxd6 cxd6 9.Nxd6+ +/-, 1-0 in 24, Brause -
starfarmer, FICS 1996.
- 5...Nf6 6.d5 Bd6 7.Nh3 O-O 8.Be2 exd5 9.cxd5 c6 10.dxc6 Bxf4
11.Qb3+ Kh8 12.Rad1 Qe7 13.cxb7 Bxb7 14.Nxf4 Nc6 15.O-O Rab8 16.Ncd5
Nxd5 17.Nxd5 Qe5 18.Qc3, 1-0 in 32,
Maciulewicz - Jirousek, DDGA
1996.
- 5...c5 6.d5 exd5 7.cxd5 would
transpose to the QGD Tarrasch Defence, Marshall Gambit.
- 5.g4 is a typical Anti-Dutch Spike.
5...Nc6! 6.Nge2 g6
(6...Nf6 -/+ [Harding])
7.Be3 Nf6 8.gxf5 exf5 9.Qd2 Be6 10.d5 Ne5 11.Nd4 Bf7 12.O-O-O
and Black has slight advantage
[Schwarz].
- 5.g3 Nf6 6.Bg2 c5 7.d5 exd5 8.cxd5 b6 9.Nge2 Ba6 10.O-O Bxe2
11.Qxe2 Bd6 12.Bh3 g6 13.Bh6 Kf7 14.f3 exf3?? 15.Qe6# 1-0,
Meyers - Blaine, 1974.
This is the only game transposed to the DDG that I could find in
Bill Wall's
500 French Miniatures (1984).
The actual order of White's moves 3-6 was g3, Bg2, c4, Nc3.
- 5.Be3 Nf6 6.Qa4+ Kf7 7.O-O-O b6 8.f3 Bb7 9.Nh3 h6 10.fxe4
Bxe4 11.Nxe4 fxe4 12.Nf2 Qd7 13.Qc2 Nc6 14.a3 Rd8,
Strange - Heikkinen, DDGA
1996.
- 5.Qh5+ g6 6.Qd1 Nf6 7.Bg5 Bg7 8.Nge2 b6 9.Bf4 Nc6 10.Nb5 O-O
11.Nxc7 Bb7 12.Nxe6 1-0, Brause - Templar, FICS 1996.