Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. Nc3 a6 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 e6 7. Nf3 b5 8.
Be2 Bb7 9. e5 h6 10. O-O Be7 11. Rb1 O-O 12. a4 c6 13. axb5 cxb5 14. Ra1 f6 15.
Re1 Qd5 16. Qd3 fxe5 17. dxe5 Qxd3 18. Bxd3 Bxf3 19. gxf3 Rxf3 *
Position (FEN): rn4k1/4b1p1/p3p2p/1p2P3/8/2PB1r2/5P1P/R1B1R1K1 w - - 0 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1394
Best move: Be4