Chess puzzle (Checkmate)
Opening: Kings_Indian_Defense, Kings_Indian_Defense_Four_Pawns_Attack
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. Be3 cxd4 8. Bxd4
Nc6 9. Be3 Ng4 10. Bd2 Qb6 11. Qe2 Nd4 12. Nxd4 Bxd4 13. O-O-O Nf2 14. Nd5 *
Position (FEN): r1b2rk1/pp2pp1p/1q1p2p1/3N4/2PbPP2/8/PP1BQnPP/2KR1B1R b - - 3 14
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 1076
Best move: Qxb2#