Chess puzzle (Advantage)
Moves: 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. Bb5+ c6 5. Be2 Bg4 6. O-O Nf6 7. h3 Bh5 8.
d3 Nbd7 9. Bg5 Bd6 10. Nbd2 O-O 11. b3 Qc7 12. Rb1 Rfe8 13. c4 dxc4 14. dxc4
Rad8 15. Qc2 Bg6 16. Bd3 Bxd3 17. Qxd3 h6 18. Bh4 Bf4 19. Ne4 Ne5 20. Nxf6+
gxf6 21. Qc3 *
Position (FEN): 3rr1k1/ppq2p2/2p2p1p/4n3/2P2b1B/1PQ2N1P/P4PP1/1R3RK1 b - - 1 21
Black to move.
Themes:  Middlegame  
Puzzle rating: 1422
Best move: Rd3