Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Other_variations
Moves: 1. d4 h6 2. Nf3 a6 3. e3 e6 4. Bd3 g6 5. O-O b6 6. Nbd2 Bb7 7. b3 Bg7 8. Bb2 g5
9. h3 h5 10. c4 Qe7 11. Qc2 Nf6 12. e4 g4 13. hxg4 *
Position (FEN): rn2k2r/1bppqpb1/pp2pn2/7p/2PPP1P1/1P1B1N2/PBQN1PP1/R4RK1 b kq - 0 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1422
Best move: hxg4