Chess puzzle (Advantage)
Moves: 1. e4 d6 2. Nf3 Nf6 3. Nc3 Bg4 4. h3 Bh5 5. Be2 c5 6. Ng1 Bxe2 7. Ngxe2 Nc6 8.
O-O Qc7 9. d3 O-O-O 10. Bg5 e6 11. d4 h6 12. Bh4 g5 13. Bg3 Nh5 14. dxc5 Nxg3
15. fxg3 dxc5 16. Qe1 f5 17. exf5 exf5 18. Rxf5 Nb4 19. a3 Nxc2 20. Qc1 *
Position (FEN): 2kr1b1r/ppq5/7p/2p2Rp1/8/P1N3PP/1Pn1N1P1/R1Q3K1 b - - 1 20
Black to move.
Themes:  Middlegame  
Puzzle rating: 1181
Best move: Nxa1