Chess puzzle (Advantage)
Opening: English_Opening, English_Opening_Anglo-Scandinavian_Defense
Moves: 1. c4 d5 2. cxd5 e6 3. dxe6 Bxe6 4. Nc3 Nc6 5. a3 *
Position (FEN): r2qkbnr/ppp2ppp/2n1b3/8/8/P1N5/1P1PPPPP/R1BQKBNR b KQkq - 0 5
Black to move.
Themes:  Opening  
Puzzle rating: 1272
Best move: Nd4