ok i find only Nf5
i did not wnt to go deeper
A Helpmate in 4
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puzzle_solver_1997 wrote:
ok i find only Nf5
i did not wnt to go deeper
No, you read the stipulation wrong. White is supposed to checkmate black.
Solution
Helpmate in 4
(Black to move; produce a legal series of moves, ending with white's 4th move giving checkmate. This is not a forced-mate problem; White and Black cooperate to attain the goal, rather than opposing one another.)