Chess puzzle (Advantage)
Opening: Russian_Game, Russian_Game_Nimzowitsch_Attack
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 d5 6. d4 Bg4 7. h3 Bh5 8. Be2
Nc6 9. O-O Be7 10. Be3 O-O 11. Nd2 Bxe2 12. Nxe2 Bd6 13. Nxe4 dxe4 14. c4 Nb4
15. f4 f5 16. d5 Nd3 17. Qc2 c6 18. Nc1 Nb4 19. Qb3 cxd5 *
Position (FEN): r2q1rk1/pp4pp/3b4/3p1p2/1nP1pP2/1Q2B2P/PP4P1/R1N2RK1 w - - 0 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1634
Best move: c5