Chess puzzle (Advantage)
Opening: Elephant_Gambit, Elephant_Gambit_Paulsen_Countergambit
Moves: 1. e4 e5 2. Nf3 d5 3. exd5 e4 4. d3 *
Position (FEN): rnbqkbnr/ppp2ppp/8/3P4/4p3/3P1N2/PPP2PPP/RNBQKB1R b KQkq - 0 4
Black to move.
Themes:  Opening  
Puzzle rating: 1415
Best move: exf3