Chess puzzle (Equality)
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 exd4 5. Nxd4 Nxd4 6. Qxd4 Be7 7. e5 c5 8.
Qc4 d5 9. Qb5+ Nd7 10. Nxd5 a6 11. Qa4 b5 12. Qg4 O-O 13. Nxe7+ *
Position (FEN): r1bq1rk1/3nNppp/p7/1pp1P3/6Q1/8/PPP2PPP/R1B1KB1R b KQ - 0 13
Black to move.
Themes:  Opening  
Puzzle rating: 691
Best move: Qxe7