Chess puzzle (Advantage)
Opening: Kings_Indian_Defense, Kings_Indian_Defense_Normal_Variation
Moves: 1. Nf3 Nf6 2. c4 g6 3. d4 Bg7 4. Nc3 d6 5. e4 O-O 6. Bd3 a5 7. a3 Bd7 8. e5 Na6
*
Position (FEN): r2q1rk1/1ppbppbp/n2p1np1/p3P3/2PP4/P1NB1N2/1P3PPP/R1BQK2R w KQ - 1 9
White to move.
Themes:  Opening  
Puzzle rating: 1133
Best move: exf6