Chess puzzle (Advantage)
Opening: English_Opening, English_Opening_Kings_English_Variation
Moves: 1. c4 e5 2. Nc3 Bb4 3. g3 Bxc3 4. bxc3 c6 5. Bg2 f5 6. e3 Nf6 7. Ne2 d6 8. d4
e4 9. O-O Nbd7 10. d5 c5 11. Nf4 Nb6 12. Rb1 Nxc4 *
Position (FEN): r1bqk2r/pp4pp/3p1n2/2pP1p2/2n1pN2/2P1P1P1/P4PBP/1RBQ1RK1 w kq - 0 13
White to move.
Themes:  Middlegame  
Puzzle rating: 1177
Best move: Qa4+