Sort:  

1.- ♘a8, …♖g8
2.-♘b6, …♖g7
3.- ♖f8+,… ♚c7 (forced)
4.- ♖c8 ++
1-0

Congrats, I hereby declare you as winner of this round! You will receive a 100 % upvote as well as @freiheit50 who also found most of the key variations.

Thank you, my brother.

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