Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. Nc3 Bf5 4. Bf4 e6 5. Nf3 Bb4 6. Qa4+ Nc6 7. a3 Bxc3+ 8.
bxc3 O-O 9. e3 Re8 10. cxd5 Nxd5 11. Qb3 Nxf4 12. exf4 Rb8 13. Bb5 Qd5 14. Qxd5
exd5+ 15. Kd2 a6 16. Bxc6 bxc6 17. Ra2 Re4 18. g3 *
Position (FEN): 1r4k1/2p2ppp/p1p5/3p1b2/3PrP2/P1P2NP1/R2K1P1P/7R b - - 0 18
Black to move.
Themes:  Endgame  
Puzzle rating: 1494
Best move: Bg4