Chess puzzle (Equality)
Moves: 1. d4 Nf6 2. Nc3 d5 3. Bf4 c6 4. e3 h6 5. h3 e6 6. Bd3 Qb6 7. Rb1 Bb4 8. Ne2
Nbd7 9. a3 Be7 10. O-O g5 11. Bh2 O-O 12. f4 g4 13. hxg4 *
Position (FEN): r1b2rk1/pp1nbp2/1qp1pn1p/3p4/3P1PP1/P1NBP3/1PP1N1PB/1R1Q1RK1 b - - 0 13
Black to move.
Themes:  Opening  
Puzzle rating: 1612
Best move: Nxg4