Chess tactic
Mate Puzzle (951)
After the setup move f3, it is Black to move. Find the forcing continuation before checking the solution.
What to look for
Calculate a forcing checkmate sequence.
Solution
39... Qf2+ 40. Kh1 40... Qf1#The full forcing line from the source position is:
39. f3 39... Qf2+ 40. Kh1 40... Qf1#
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