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1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Bb4+ · ECO C21
Danish Gambit Accepted: Copenhagen Defense is a chess opening that arises after 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Bb4+. It is classified C21 in the ECO system, and the position after these moves has white to move.
This line is a variation within the Danish Gambit Accepted family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Bb4+.