Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Alapin_Variation
Moves: 1. e4 c5 2. c3 g6 3. d4 cxd4 4. cxd4 Bg7 5. Nc3 Nc6 6. Nf3 d6 7. Be3 Bg4 8. Be2
Nf6 9. e5 dxe5 10. dxe5 Qxd1+ 11. Rxd1 Bxf3 *
Position (FEN): r3k2r/pp2ppbp/2n2np1/4P3/8/2N1Bb2/PP2BPPP/3RK2R w Kkq - 0 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1789
Best move: exf6