Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Smith-Morra_Gambit
Moves: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Be3 d6 6. Rc1 a6 *
Position (FEN): r1bqkbnr/1p2pppp/p1np4/8/4P3/2N1B3/PP3PPP/2RQKBNR w Kkq - 0 7
White to move.
Themes:  Opening  
Puzzle rating: 1500
Best move: Nd5