Chess tactic

Endgame Puzzle (1245)

After the setup move Rb2, it is Black to move. Find the forcing continuation before checking the solution.

Position after Rb2. Black to move.

Puzzle ID

03CGT

Rating

1245

Side to move

Black

Themes

Endgame, Mate, Mate in 3

Material

White is ahead by 2 points

FEN

r5k1/5p2/7p/4Q3/3P1Ppq/4P2P/1R4PK/8 b - - 3 43

What to look for

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

43... g3+ 44. Kg1 44... Ra1+ 45. Rb1 45... Rxb1#

The full forcing line from the source position is:

43. Rb2 43... g3+ 44. Kg1 44... Ra1+ 45. Rb1 45... Rxb1#