Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Advance_Variation
Moves: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. f4 Bd7 6. Nf3 Qb6 7. Be3 *
Position (FEN): r3kbnr/pp1b1ppp/1qn1p3/2ppP3/3P1P2/2P1BN2/PP4PP/RN1QKB1R b KQkq - 4 7
Black to move.
Themes:  Opening  
Puzzle rating: 1654
Best move: Qxb2