Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 e6 3. e3 Nf6 4. a3 b6 5. Nf3 Ba6 6. Nbd2 Nbd7 7. Bd3 c5 8. b4
dxc4 9. Nxc4 Bb7 10. bxc5 bxc5 11. a4 Rc8 12. Ba3 Be7 13. O-O O-O 14. Qb3 Bd5
15. Rfe1 Rb8 16. Qc2 cxd4 17. Nxd4 e5 18. Nf5 Bxa3 19. Rxa3 Rc8 20. Nfd6 Rc6
21. e4 Be6 22. Rc3 Nb6 23. Rb1 Nxc4 24. Nxc4 Qc7 25. Rb5 Rc8 26. Rxe5 Bxc4 27.
Bxc4 Rxc4 28. Rxc4 Qxc4 29. Qb2 Qc1+ 30. Qxc1 *
Position (FEN): 2r3k1/p4ppp/5n2/4R3/P3P3/8/5PPP/2Q3K1 b - - 0 30
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 600
Best move: Rxc1#