Chess puzzle (Advantage)
Opening: London_System, London_System_Other_variations
Moves: 1. d4 Nf6 2. Nf3 g6 3. Bf4 d6 4. e3 Bg7 5. c4 O-O 6. Bd3 Bg4 7. h3 Re8 *
Position (FEN): rn1qr1k1/ppp1ppbp/3p1np1/8/2PP1Bb1/3BPN1P/PP3PP1/RN1QK2R w KQ - 1 8
White to move.
Themes:  Opening  
Puzzle rating: 1740
Best move: hxg4