Chess puzzle (Checkmate)
Opening: Scandinavian_Defense, Scandinavian_Defense_Panov_Transfer
Moves: 1. e4 d5 2. exd5 Nf6 3. c4 c6 4. dxc6 Nxc6 5. b3 e5 6. Bb2 Bc5 7. Nc3 Bf5 8. d3
Nb4 9. Qd2 Bxd3 10. O-O-O Ne4 11. Nxe4 *
Position (FEN): r2qk2r/pp3ppp/8/2b1p3/1nP1N3/1P1b4/PB1Q1PPP/2KR1BNR b kq - 0 11
Black to move.
Themes: Queenside Attack Opening Mate in 1 
Puzzle rating: 770
Best move: Nxa2#