Balogh Defense

The Balogh Defense (also known as the Balogh Counter Gambit) is an unusual chess opening beginning with the moves:
It may also arise by transposition from the Staunton Gambit against the Dutch Defense, 1.d4 f5 2.e4!?, if Black declines the gambit with 2...d6.
The defense is named for János Balogh (1892–1980), who was a Hungarian International Master of correspondence chess, and a strong master at over-the-board chess. The opening is rarely seen today because it weakens Black's kingside somewhat and often results in a backward e-pawn and/or a hole on e6 after Black's light-square bishop is exchanged. International Correspondence Chess Master Keith Hayward has recently written a series of articles arguing that the defense, though risky, is playable.