The Ryder Gambit is a chess opening variation of the Blackmar-Diemer Gambit that is characterized by the following moves, 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3.
The Blackmar-Diemer Gambit is an aggressive gambit already, the ryder gambit makes the line even more aggressive by sacrificing another pawn in exchange for rapid development.
Emil Joseph Diemer vs Hermann Halosar – 1934
This example is from a game that took place in 1934 between Emil Joseph Dimer and Hermann Halosar.