In the rule “Guesses” replace the entire text of that rule with the following text:

When posting an Authentic Shot, the Seeker authoring that post may optionally perform a Guess, which is an atomic action with the following steps:
* Reduce their Score by 3
* Privately track text that contains the full title, minus the text “Story Post: “, of that Authentic Shot post, the name of a Seeker other than the author of that Authentic Shot, and a number of Private Criteria that the named Authentic Shot will satisfy for the named Seeker. This is known as the Guess Contents.
* Add the text “Guess:” followed by the SHA256 hash of the Guess Contents from the preceding step to the body of that Authentic Shot. This is known as the Guess Hash.

If it has been at least 48 hours after an Authentic Shot has been posted, and that post contains a Guess Hash, the author of the post may reveal the Guess Contents associated with the Guess Hash of that post in a comment to that post. If the Guess Contents are valid and the named Seeker had responded to the named Authentic Shot with a number of satisfied Private Criteria that matches the number mentioned in the Guess Contents, this is considered a Successful Guess for the author of that post, and the author of that post may increase their Score by the Exposure of each Private Criteria that was satisfied in the named Authentic Shot for the named Seeker in the Guess Contents.

In the rule “Awards”, replace the text in the Standard for “Grand Prix in Advertising Photography” with the following text:

Have at least 1 Successful Guess