Chess puzzle (Advantage)
Opening: Russian_Game, Russian_Game_Three_Knights_Game
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nc3 d6 4. h3 Be7 5. Bc4 O-O 6. a3 b6 7. d3 Bb7 8. O-O a6
9. Bg5 Nbd7 10. Nh2 h6 11. Bh4 Nh7 12. f4 *
Position (FEN): r2q1rk1/1bpnbppn/pp1p3p/4p3/2B1PP1B/P1NP3P/1PP3PN/R2Q1RK1 b - - 0 12
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 926
Best move: Bxh4