Chess tactic

Endgame Puzzle (2160)

After the setup move f8=Q, it is Black to move. Find the forcing continuation before checking the solution.

Position after f8=Q. Black to move.

Puzzle ID

0lyvf

Rating

2160

Side to move

Black

Themes

Endgame, Exposed King, Mate

Material

White is ahead by 7 points

FEN

5Q1R/1p5R/p1b1k1p1/5p2/P2P4/3nP1K1/4r3/8 b - - 0 39

What to look for

A tactic from a reduced-material position where king activity and promotion threats matter.

39... Rg2+ 40. Kh4 40... Rg4+ 41. Kh3 41... Nf2+ 42. Kh2 42... Rg2#

The full forcing line from the source position is:

39. f8=Q 39... Rg2+ 40. Kh4 40... Rg4+ 41. Kh3 41... Nf2+ 42. Kh2 42... Rg2#