Chess puzzle (Advantage)
Opening: Slav_Defense, Slav_Defense_Chameleon_Variation
Moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 5. cxd5 cxd5 6. Bf4 Bf5 7. e3 e6 8. Bd3
Bxd3 9. Qxd3 Nc6 10. O-O Bd6 11. Bg5 O-O 12. Rac1 Nb4 13. Qe2 Nxa2 *
Position (FEN): r2q1rk1/1p3ppp/p2bpn2/3p2B1/3P4/2N1PN2/nP2QPPP/2R2RK1 w - - 0 14
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1313
Best move: Nxa2