What kind of transposition is this?

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Avatar of MetalFactor

Avatar of Fear_ItseIf

kings gambit declined it looks like, though im not amiliar with the positions.

It later transposes to a line in the bishop opening (which at times is similar to the kings gambit)

Avatar of pfren

It is some sort of King's gambit declined indeed, although after move four the choices of both players are at least questionable.