Winning with the Blackmar-Diemer SEMTEX Attack!
Of all the "unsound" and "refuted" openings we regularly shun, none is as maligned as the Blackmar-Diemer Gambit. Typically, my OTB opponent will roll his eyes when I play it, as though I was venturing the Grob; which in my view, really is unsound. But the SEMTEX Attack offers a more stable BDG that is easy to master and will put the most experienced chessplayer into zoned-out stress.
Here's the opening:
2.e4 offering the gambit pawn. If Black accepts the gambit, the following is the usual continuation...
3. N-c3 N-f6
4. a4 a6 (the Shadow Government Defense)
5. R-b1 c6
6. N-h3 K-d7...we arrive at a Mexican standoff and a very drawish position.
But in my view, the SEMTEX Attack provides White with a solid pawn foundation, more than adequate King safety and a comfortable endgame:
Black's position is hopeless already! If he responds
5...f6 and crawls through the slums of Baltic Avenue
to support the weak dark square e5, White will simply play
6. B-g5! in a gorgeous bishop sacrifice, weakening the dark square to a fatal degree! Otherwise, if Black declines the gambit bishop with
5...e5?! attempting a hasty and ill-conceived plan of overprotection...
White will play the nasty Rotterdam Response with
6. c4!!! and a won game.
The rest is simply a matter of technique.