Chess Opening Theory/1. e4/1...e5/2. f4/2...exf4/3. Nf3/3...g5/4. h4/4...g4/5. Ne5/5...Nf6

tright Kieseritzky Gambit, Berlin Defence rd nd bd qd kd bd rd pd pd pd pd pd pd nd nl pl pd pd pl pl pl pl pl pl rl nl bl ql kl bl rl Common moves: 6. d4 - Main Line 6. Bc4 - Morphy Attack 6. Nxg4 - Anderssen VariationThere's a pawn on g4 if White wants to capture it, but it isn't a free gift: Black is counter-attacking e4. 6. d4 is the main line. White is attacking a pawn and Black is attacking a pawn, that's 1 pawn each, so rather than resolve either of those situations, White makes to 2 to 1 in her favour! This move also ensures that once Black kicks the knight away from e5 by playing ...d6, it will be able to retreat to d3 without blocking the d-pawn. Playing 6.d3 wouldn't have that advantage, and would also shut in the f1-bishop. 6. Bc4 was the move favoured by the world champion of the pre-World Championship era, Paul Morphy. White capitalises on the e5-knight's attack on f7. Black will have to close the diagonal with 6...d5 7.exd5, after which material will be level but White's bishop will be blockaded by its own pawn. 6. Nxg4 is also possible, but White is in danger of remaining a pawn down after 6...Nxe4 and will have to enter some complications involving a sacrifice of the rook on h1. King's Gambit