Chess puzzle (Advantage)
Opening: Nimzo-Indian_Defense, Nimzo-Indian_Defense_Mikenas_Attack
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qd3 d5 5. Bg5 h6 6. Bh4 Nbd7 7. e3 dxc4 8.
Qxc4 Bxc3+ 9. bxc3 Nb6 10. Qb5+ Bd7 11. Qb3 O-O 12. Bd3 Ba4 13. Qa3 Qd5 14. Nf3
Nc4 *
Position (FEN): r4rk1/ppp2pp1/4pn1p/3q4/b1nP3B/Q1PBPN2/P4PPP/R3K2R w KQ - 11 15
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1289
Best move: Qxa4