Chess puzzle (Advantage)
Moves: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3
Bb7 9. O-O a6 10. e4 c5 11. d5 b4 12. dxe6 fxe6 13. Ne2 Be7 14. Nf4 Qb6 15. Ng5
Ne5 16. Nfxe6 Rg8 17. Bf4 Nxd3 18. Qxd3 Bxe4 19. Nc7+ Qxc7 20. Qxe4 *
Position (FEN): r3k1r1/2q1b1pp/p4n2/2p3N1/1p2QB2/8/PP3PPP/R4RK1 b q - 0 20
Black to move.
Themes:  Middlegame  
Puzzle rating: 777
Best move: Nxe4