Chess puzzle (Checkmate)
Opening: Rat_Defense, Rat_Defense_Antal_Defense
Moves: 1. d4 d6 2. e4 Nd7 3. c4 g6 4. Nc3 e5 5. d5 Bg7 6. Be3 Ngf6 7. Nge2 O-O 8. g3
Ng4 9. Bd2 Nc5 10. f3 *
Position (FEN): r1bq1rk1/ppp2pbp/3p2p1/2nPp3/2P1P1n1/2N2PP1/PP1BN2P/R2QKB1R b KQ - 0 10
Black to move.
Themes:  Opening Mate in 1 
Puzzle rating: 938
Best move: Nd3#