Chess puzzle (Advantage)
Opening: Kings_Indian_Defense, Kings_Indian_Defense_Orthodox_Variation
Moves: 1. d4 Nf6 2. c4 d6 3. Nc3 g6 4. e4 Bg7 5. Nf3 O-O 6. Be2 Nc6 7. O-O e5 8. d5
Ne7 9. b4 a5 10. Ba3 b6 11. bxa5 Rxa5 12. Bb4 Ra8 13. a4 Nh5 14. g3 f5 15. a5
bxa5 16. Bxa5 fxe4 17. Nxe4 Nf5 18. Qb3 Nd4 *
Position (FEN): r1bq1rk1/2p3bp/3p2p1/B2Pp2n/2PnN3/1Q3NP1/4BP1P/R4RK1 w - - 3 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1404
Best move: Nxd4