Chess puzzle (Checkmate)
Opening: Polish_Opening, Polish_Opening_Other_variations
Moves: 1. b4 d5 2. Bb2 d4 3. Nf3 Nc6 4. b5 Nb4 5. Bxd4 e5 6. Bxe5 Qd5 7. c3 f6 8. Bxc7
Bf5 9. cxb4 Rc8 10. b6 Bxb4 11. Qa4+ Bd7 12. Qxb4 axb6 13. Bxb6 *
Position (FEN): 2r1k1nr/1p1b2pp/1B3p2/3q4/1Q6/5N2/P2PPPPP/RN2KB1R b KQk - 0 13
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 879
Best move: Rc1#