Chess tactic
Endgame Puzzle (1561)
After the setup move a4, it is White 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
41. Re5+ 41... Kxf4 42. Bg3#The full forcing line from the source position is:
40... a4 41. Re5+ 41... Kxf4 42. Bg3#
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