Chess puzzle (Advantage)
Opening: English_Opening, English_Opening_Agincourt_Defense
Moves: 1. c4 e6 2. g3 c6 3. Bg2 d5 4. b3 Nf6 5. d3 Bb4+ 6. Bd2 a5 7. Bxb4 axb4 8. Qd2
c5 9. Nf3 Nc6 10. O-O d4 11. Qg5 O-O 12. Qxc5 *
Position (FEN): r1bq1rk1/1p3ppp/2n1pn2/2Q5/1pPp4/1P1P1NP1/P3PPBP/RN3RK1 b - - 0 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 1497
Best move: Ra5