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The problem with that is that the whole flow would be stalled if the participant doesn't place a guess. Could take hours or even days.

No, it wouldn’t, @shaka. Look, everyone who open a piece has the right to one guess. You are opening, let’s say, third piece, and the first two did not take their guess. The third one can guess without waiting for the first or second. You don’t wait for the first or second. You do not “skip” anyone. That would stimulate them not to wait but put their guesses before someone give a correct answer.

Less work, fair conditions.

This way you are putting the first contestant to rely at pure luck only :)

Please, think about it.

If I wouldn't wait for a user making a guess and keep removing puzzle pieces as the comments come in, presumably half the image would be revealed already in the first update (in particular, if users know in advance that their odds remain the same no matter how early they participate)

You are right, the odds are lower the earlier you guess, but therefore, the potential rewards are higher. As of now we are already down at 0.75 SBD.

Thanks for you sharing your thoughts!

Whoever guess, gets the reward, minus no. of pieces revealed in the moment of the winning guess. Would’t be a problem.

If I find some app under linux to make a puzzle out of the photo, I could try to show the model, instead of explaining :)

Thank you for your patience and support, @shaka :)

For example, I was forced to guess after one piece, and now I would say Istanbul.