Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Smith-Morra_Gambit
Moves: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 a6 5. Bc4 e6 6. Nf3 b5 7. Bb3 Bb7 8. Qe2
d6 9. O-O Nc6 10. a4 b4 11. Nd5 exd5 12. exd5+ Nce7 *
Position (FEN): r2qkbnr/1b2nppp/p2p4/3P4/Pp6/1B3N2/1P2QPPP/R1B2RK1 w kq - 1 13
White to move.
Themes: Defensive Move Opening  
Puzzle rating: 2031
Best move: a5