Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Accelerated_Dragon
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 d6 7. Qd2 Bd7 8.
O-O-O a6 9. f4 b5 10. Nf3 Na5 11. b3 Nc6 12. Nd5 Nf6 13. Nb6 *
Position (FEN): r2qk2r/3bppbp/pNnp1np1/1p6/4PP2/1P2BN2/P1PQ2PP/2KR1B1R b kq - 4 13
Black to move.
Themes:  Opening  
Puzzle rating: 1254
Best move: Nxe4