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If a walkthrough claims to be original, I think to avoid any negative thoughts, you could upload a password-protected RAR archive of the save file. :)
I don't understand how you can participate in a tournament without trusting the organizer? :smile32: Surely, if the organizer takes first place in the tournament, receiving the save file from the player who came in second just a few minutes before the end of the tournament, everyone will think that the organizer not only understood the logic of the walkthrough but also managed to improve it in those few minutes? :confused: