Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Chigorin_Variation
Moves: 1. Nf3 Nc6 2. d4 d5 3. Bf4 Bf5 4. Nh4 Be4 5. Nc3 e6 6. Nxe4 *
Position (FEN): r2qkbnr/ppp2ppp/2n1p3/3p4/3PNB1N/8/PPP1PPPP/R2QKB1R b KQkq - 0 6
Black to move.
Themes:  Opening  
Puzzle rating: 1933
Best move: dxe4