Chess puzzle (Checkmate)
Opening: Indian_Defense, Indian_Defense_Budapest_Defense
Moves: 1. d4 Nf6 2. c4 e5 3. Nc3 exd4 4. Qxd4 Nc6 5. Qe3+ Be7 6. Nf3 O-O 7. Bd2 d5 8.
cxd5 Nb4 9. O-O-O Bf5 10. Nh4 Nfxd5 11. Nxd5 *
Position (FEN): r2q1rk1/ppp1bppp/8/3N1b2/1n5N/4Q3/PP1BPPPP/2KR1B1R b - - 0 11
Black to move.
Themes: Queenside Attack Opening Mate in 1 
Puzzle rating: 1464
Best move: Nxa2#