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  1. f7+
  1. ... Rxcf7 2.Rxc7

If Kxf7 Horse eat in d6+ white winning the Queen !

Not really, because black can capture with the Queen Qxd6. Good try though!

in which movement?

I understand that you are suggesting the following solution, but black captures the Knight on the third move:

  1. f7+ Rxf7
  2. Rxc7 Kxf7
  3. Nxd6+ Qxd6

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