Chess puzzle (Crushing)
Opening: Alekhine_Defense, Alekhine_Defense_Steiner_Variation
Moves: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. b3 d5 5. cxd5 Qxd5 6. Nf3 Nc6 7. Nc3 Qd8 8.
Bb5 Bd7 9. a4 a6 10. a5 *
Position (FEN): r2qkb1r/1ppbpppp/pnn5/PB2P3/8/1PN2N2/3P1PPP/R1BQK2R b KQkq - 0 10
Black to move.
Themes:  Opening  
Puzzle rating: 1517
Best move: axb5