Chess puzzle (Checkmate)
Opening: Pirc_Defense, Pirc_Defense_Byrne_Variation
Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 Bg7 5. Qd2 O-O 6. O-O-O c6 7. f4 b5 8. e5
dxe5 9. fxe5 Nd5 10. Nxd5 Qxd5 11. Nf3 Be6 12. Bxe7 Qxa2 13. c3 Qa1+ 14. Kc2
Bb3+ 15. Kxb3 *
Position (FEN): rn3rk1/p3Bpbp/2p3p1/1p2P3/3P4/1KP2N2/1P1Q2PP/q2R1B1R b - - 0 15
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1241
Best move: Qa4#