Mate Puzzle (1208)

After the setup move Nxf1, it is White to move. Find the forcing continuation before checking the solution.

Position after Nxf1. White to move.

Puzzle ID

04GLa

Rating

1208

Side to move

White

Themes

Mate, Mate in 3, Middlegame

Material

Black is ahead by 5 points

FEN

4k1r1/1p2ppbp/pq4p1/2p1N3/4PP2/1P5P/PBP3P1/3Q1nK1 w - - 0 21

What to look for

Calculate a forcing checkmate sequence.

21. Qd7+ 21... Kf8 22. Qc8+ 22... Qd8 23. Qxd8#

The full forcing line from the source position is:

20... Nxf1 21. Qd7+ 21... Kf8 22. Qc8+ 22... Qd8 23. Qxd8#