Chess puzzle (Checkmate)
Moves: 1. d4 c6 2. c4 d5 3. Nf3 Nf6 4. b3 Bf5 5. e3 e6 6. Bd3 Bxd3 7. Qxd3 Be7 8. O-O
Nbd7 9. Nbd2 O-O 10. Bb2 c5 11. e4 dxe4 12. Nxe4 Nxe4 13. Qxe4 Nf6 14. Qxb7
cxd4 15. Nxd4 Bc5 16. Nf3 Qd6 17. Rad1 Qf4 18. Rfe1 Rab8 19. Qa6 Ng4 20. Rf1
Rfd8 21. h3 Rxd1 22. Rxd1 Nxf2 23. Bd4 Nxd1 24. Bxc5 Nc3 25. Bd6 Qe3+ 26. Kh2
Rd8 27. Qa5 Rxd6 28. Qb4 Ra6 *
Position (FEN): 6k1/p4ppp/r3p3/8/1QP5/1Pn1qN1P/P5PK/8 w - - 2 29
White to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 552
Best move: Qb8#