Chess puzzle (Advantage)
Opening: English_Opening, English_Opening_Anglo-Lithuanian_Variation
Moves: 1. c4 Nc6 2. Nc3 g6 3. g3 b6 4. Bg2 Bb7 5. e3 Bg7 6. Nge2 e5 7. O-O f5 8. d4 e4
9. Nf4 Nf6 10. d5 Ne5 11. d6 Nxc4 12. dxc7 Qxc7 13. b3 Ne5 *
Position (FEN): r3k2r/pbqp2bp/1p3np1/4np2/4pN2/1PN1P1P1/P4PBP/R1BQ1RK1 w kq - 1 14
White to move.
Themes:  Middlegame  
Puzzle rating: 1664
Best move: Nb5