I play this 90% of the time, with the odd English or P-K4 thrown in.

Offering the Blackmar Diemer Gambit, which I have done in on-line games on occasion over the last ten years. The opening is an evil temptress, balanced on the knife edge between dubiousness and respectability.

Accepting the gambit

Emil Diemer's improvement over Blackmar's 3.f3 which is apparently busted by 3...e5.

With this white confirms the pawn offer and hopes for a gain in development and open attacking lines on the king side in return.

The Teichmann Defence which has been played against me most times out of ten recently...

Best I reckon. Bh4 followed by g4 leads to an easy attacking game for white.

This is known as the Seidel Hall attack, after Arthur Hall, an English player who played the Gambit over the board and in correspondence games in the 1960's and 70s

Black grabs a second pawn.

Develops with Tempo and prepares Queen side castling.