Blackmar-Diemer Gambit
White's complete intermediate repertoire in the Blackmar-Diemer Gambit (1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3). Seven drills cover the Teichmann 5...Bg4 mainline, the Ziegler 5...c6 with the Nxe6 sacrifice, the Euwe 5...e6, the Bogoljubow 5...g6, the Gunderam 5...Bf5 with the kingside storm, the declined Lemberger 3...e5, and the declined Vienna 3...Bf5.
The Blackmar-Diemer Gambit (1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3!?) is the most aggressive answer to 1...d5 in chess — a true sacrifice for a roaring open f-file, three minor pieces unleashed in four moves, and a kingside attack that has wrecked thousands of unprepared defenders. This pack drills the seven essential paths: the Teichmann mainline with ...Bg4 and the Bxf3-Qxf3 plan, the slashing Ziegler with the Nxe6!! piece sacrifice, the Euwe with the Re1-Rxe6 exchange sac, the Bogoljubow with the Qh4 attack, the Gunderam with the h-file storm, and the declined Lemberger and Vienna systems where White still gets a clear development lead. Thirty exam positions sharpen the f-file pressure, the Qh4 swing, and the piece sacrifices that make the BDG one of the most dangerous practical weapons against 1...d5 at every level.