Chess puzzle (Advantage)
Opening: Russian_Game, Russian_Game_Nimzowitsch_Attack
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. bxc3 Be7 7. Bc4 Bg4
8. h3 Bh5 9. g4 Bg6 10. O-O Nc6 11. Re1 O-O 12. Ba3 Bf6 13. Nh4 *
Position (FEN): r2q1rk1/ppp2ppp/2np1bb1/8/2B3PN/B1P4P/P1PP1P2/R2QR1K1 b - - 8 13
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1280
Best move: Bxh4