Chess puzzle (Checkmate)
Opening: French_Defense, French_Defense_Steiner_Variation
Moves: 1. e4 e6 2. c4 d5 3. exd5 exd5 4. b3 Qf6 5. Nc3 d4 6. Na4 d3 7. Bb2 Qg6 8. f3
Nc6 9. Qb1 Nb4 10. Kd1 Nc2 11. Bxd3 Qxd3 12. Qxc2 *
Position (FEN): r1b1kbnr/ppp2ppp/8/8/N1P5/1P1q1P2/PBQP2PP/R2K2NR b kq - 0 12
Black to move.
Themes:  Opening Mate in 1 
Puzzle rating: 1013
Best move: Qf1#