Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Hyperaccelerated_Pterodactyl
Moves: 1. d4 g6 2. e4 Bg7 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Qb6 6. Nf3 Nc6 7. Rb1 *
Position (FEN): r1b1k1nr/pp1pppbp/1qn3p1/8/4P3/2N2N2/PPP2PPP/1RBQKB1R b Kkq - 4 7
Black to move.
Themes:  Opening  
Puzzle rating: 1088
Best move: Bxc3+