Chess puzzle (Advantage)
Opening: Russian_Game, Russian_Game_Three_Knights_Game
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nc3 Bb4 4. d3 Nc6 5. a3 Ba5 6. b4 Bb6 7. Bg5 h6 8. Bh4
g5 9. Nxg5 hxg5 10. Bxg5 Bd4 11. Nd5 Nxd5 12. Bxd8 Bxa1 *
Position (FEN): r1bBk2r/pppp1p2/2n5/3np3/1P2P3/P2P4/2P2PPP/b2QKB1R w Kkq - 0 13
White to move.
Themes:  Middlegame  
Puzzle rating: 1183
Best move: Qxa1