Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. Nc3 a6 4. d4 exd4 5. Nxd4 c5 6. Nf3 Nf6 7. Bg5 Be7 8. Bc4
O-O 9. Qd2 d5 10. exd5 Ng4 11. Bxe7 Qxe7+ 12. Qe2 Qxe2+ 13. Nxe2 *
Position (FEN): rnb2rk1/1p3ppp/p7/2pP4/2B3n1/5N2/PPP1NPPP/R3K2R b KQ - 0 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1774
Best move: b5