Chess puzzle (Advantage)
Opening: Modern_Defense, Modern_Defense_Three_Pawns_Attack
Moves: 1. e4 g6 2. d4 Bg7 3. f4 d6 4. Nf3 Bg4 5. h3 Bxf3 6. gxf3 Nc6 7. Be3 Qd7 8. Nc3
O-O-O 9. Bc4 e6 10. Qe2 Nb4 11. a3 d5 *
Position (FEN): 2kr2nr/pppq1pbp/4p1p1/3p4/1nBPPP2/P1N1BP1P/1PP1Q3/R3K2R w KQ - 0 12
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 2002
Best move: axb4