Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Other_variations
Moves: 1. d4 d5 2. h4 Nf6 3. a4 c5 4. a5 Nc6 5. dxc5 e5 6. c4 Bxc5 7. cxd5 Qxd5 8. Qc2
Bb4+ 9. Nc3 Nd4 10. Qa4+ Bd7 11. Qxb4 *
Position (FEN): r3k2r/pp1b1ppp/5n2/P2qp3/1Q1n3P/2N5/1P2PPP1/R1B1KBNR b KQkq - 0 11
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 787
Best move: Nc2#