Chess tactic

Endgame Puzzle (921)

After the setup move Rxg7, it is Black to move. Find the forcing continuation before checking the solution.

Position after Rxg7. Black to move.

Puzzle ID

0XfzF

Rating

921

Side to move

Black

Themes

Endgame, Mate, Mate in 2

Material

White is ahead by 4 points

FEN

4k3/6RN/2p1p2p/2N1P3/2Pn1p2/3P3P/5rPK/8 b - - 0 31

What to look for

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

31... Nf3+ 32. Kh1 32... Rf1#

The full forcing line from the source position is:

31. Rxg7 31... Nf3+ 32. Kh1 32... Rf1#