Could you find this Mate in 549 for White in this 7 pieces on the board chess game and is there a longer forced checkmate than this for 7 pieces?

Cryptic-Game
Could you find this Mate in 549 for White in this 7 pieces on the board chess game and is there a longer forced checkmate than this for 7 pieces?
http://rocketcheckmate.blogspot.com/2014/06/mate-in-549.html?m=1

A Mate in 549 is the longest eventual checkmating sequence known in which there are 7 pieces on the chess board in which it forces white to win with perfect play if black also plays perfect and delays the checkmate as long as possible. This position is a forced checkmate for White in 549 moves if both sides play perfect. I must admit that there is no way I can find any mate in more than 13 or 14 moves as this requires far too many potential outcomes to play in my head. I have found a mate in 11 in a game before and those are extremely difficult to find.

There is no known 7 pieces on the chess board mating process that takes more than 549 moves to accomplish with perfect play from both sides but do you think there is? It is also unknown if there is a scenario where it can take more. 549 may be the max for 7 pieces but we can't prove it.

Please share what you think after revealing the answer! I saw the answer and after like move 6, I was totally amazed. I know it looks like a draw but there actually is a way in which White has a guaranteed path to victory with perfect play and it can't last fewer than or more than 549 moves if both White and Black plays perfect.
I could find and yes
I could find and no
I can't find and yes
I can't find and no
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Could you find this Mate in 549 for White in this 7 pieces on the board chess game and is there a longer forced checkmate than this for 7 pieces?
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