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The Janisch Gambit is an exceptionally effective surprise weapon for black against the Ruy Lopez. Also known as the Schliemann Defense, black kicks off the game by immediately offering a pawn sacrifice on move 3 with 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5!? – resembling a reversed Vienna Gambit or King’s Gambit in that black is rapidly introducing extra firepower with the f-pawn to attack white’s center.