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1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 · ECO A00
Van't Kruijs Opening: Keoni-Hiva Gambit, Alua Variation is a chess opening that arises after 1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3. It is classified A00 in the ECO system, and the position after these moves has black to move.
This line is a variation within the Van't Kruijs Opening family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3.