Chess puzzle (Advantage)
Opening: Modern_Defense, Modern_Defense_Other_variations
Moves: 1. d4 g6 2. Bf4 Bg7 3. e4 c6 4. Nc3 Qb6 5. Qc1 d6 6. Be2 e5 7. d5 *
Position (FEN): rnb1k1nr/pp3pbp/1qpp2p1/3Pp3/4PB2/2N5/PPP1BPPP/R1Q1K1NR b KQkq - 0 7
Black to move.
Themes:  Opening  
Puzzle rating: 1156
Best move: exf4