Chess puzzle (Advantage)
Opening: Catalan_Opening, Catalan_Opening_Open_Defense
Moves: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 dxc4 6. O-O Nbd7 7. Nc3 O-O 8.
Qa4 Nb6 9. Qc2 c6 10. Bg5 Nbd5 11. a3 Rb8 12. Rad1 b5 13. e4 Nxc3 14. bxc3 Bb7
15. e5 Nd5 16. h4 h6 17. Bc1 Qa5 18. Bb2 Bxa3 *
Position (FEN): 1r3rk1/pb3pp1/2p1p2p/qp1nP3/2pP3P/b1P2NP1/1BQ2PB1/3R1RK1 w - - 0 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1531
Best move: Ra1