With the increased popularity of the Berlin Defense, many Anti-Berlin lines have become heavily explored, including the Four Knights Game.
The Rubinstein Variation, starting with 4… Nd4 leads to dynamic positions where Black often leaves the e5-pawn hanging and plays for the compensation. The most topical response for White is accepting the challenge, like in the main line with 5. Ba4 Bc5 6. Ne5 O-O, also known as the Marshall Gambit.
[Diagram: Black to Move] White is behind in development, which gives Black the possibility to gain serious advantage, with the help of a petite tactics!
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