Chess tactic
Endgame Puzzle (800)
After the setup move d5, it is Black to move. Find the forcing continuation before checking the solution.
What to look for
A tactic from a reduced-material position where king activity and promotion threats matter.
Solution
39... Rf1+ 40. Rxf1 40... Qxf1#The full forcing line from the source position is:
39. d5 39... Rf1+ 40. Rxf1 40... Qxf1#
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