Chess puzzle (Advantage)
Opening: Russian_Game, Russian_Game_Italian_Variation
Moves: 1. e4 e5 2. Nf3 Nf6 3. Bc4 d6 4. O-O Be6 5. Be2 Nxe4 6. d3 f5 *
Position (FEN): rn1qkb1r/ppp3pp/3pb3/4pp2/4n3/3P1N2/PPP1BPPP/RNBQ1RK1 w kq - 0 7
White to move.
Themes:  Opening  
Puzzle rating: 1380
Best move: dxe4