Auctions in Whitehack

I am reading the Whitehack RPG rules, and found its auction mechanic, used for race like situations, very interesting. Briefly, it consists for each character involved in picking an attribute and rolling a d6. The d6 value is hidden from all other contestants, and an auction happens between all participants. In the end, the highest bidder must roll higher than his bid but lower than his attribute + d6 value to succeed.

How would this mechanic be possible to implement in GP without all participants knowing the result of the d6 roll? Would it require a third party?

There's the possibility to hide your dice rolls so only you and the GM can see them.
Check out this guide.

Is that what you're looking for?

Well that works... except if the GM takes part in the auction. Which is usually the case...

Hmm... That's a tough one. I suppose you'd have to make a special GM account that you'll only use for game forum management. Then add your real account as a player to that game.
This would allow you to still post without seeing the hidden rolls. But everyone has to trust that the GM won't cheat, I suppose...

Other than that I see no solution within Gamersplane.

If you need the GM to be blind as well, then the players can open a public supplementary game to make hidden rolls in, that way the GM can't see the players rolls. The GM might want to subscribe to that thread(s) before any rolls though to confirm there's no cheating by deleting and reposting a new roll. Webhooks would detect that too.

That's also an option. But in that case the players could lie about what they rolled and I don't think there's a way for anyone to check. If you trust everyone in the game to play fair, that's not an issue.

Or am I misunderstanding your solution, Chalry?

I think this works? 🤔

1. Everyone thinks of a number between 1 and 6.
2. They then create a secret password phrase ending with their number. e.g. "My SecReT passWORD number is 4" and keep a note of it somewhere private.
3. They visit a site (e.g. https://www.onlinewebtoolkit.com/hash-generator) to generate a hash for the passphrase

4. Everyone posts their hash publicly as they roll a d6.
5. Their real result is the d6 rolled + the secret number from step 1 modulo 6 (so if the number is bigger than 6, minus 6).
6. Have your auction.
7. The winner (or everyone?) reveals their passphrase, which can be verified using the same hashing algorithm (the hash should match).

Once everything is decided/resolved, you can reveal the roll results to prove it. Click edit on the post with the roll and switch the visibility from hidden to hide nothing.

That's a clever way to do it too.

Ah didn't think about that :)