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Rat Defense: Fuller Gambit is a chess opening that arises after 1.e4 d6 2.f4 d5 3.exd5 Nf6. It is classified B00 in the ECO system, and the position after these moves has white to move.
This line is a variation within the Rat Defense family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.e4 d6 2.f4 d5 3.exd5 Nf6.