Chess puzzle (Advantage)
Opening: English_Opening, English_Opening_Kings_English_Variation
Moves: 1. c4 e5 2. e3 Nc6 3. Nf3 Nf6 4. Nc3 Bc5 5. Bd3 O-O 6. O-O Re8 7. Qc2 *
Position (FEN): r1bqr1k1/pppp1ppp/2n2n2/2b1p3/2P5/2NBPN2/PPQP1PPP/R1B2RK1 b - - 10 7
Black to move.
Themes:  Opening  
Puzzle rating: 1822
Best move: Nb4