It's really just an excuse to guess stamp images and send each other covers.
To play, we use one stamp, which can be part of a set or was issued alone. The important thing here is not value, but that the stamp is known to collectors, and that it preferably has an interesting story, so that the poster can explain it.
We display a small part of the stamp and the first person to guess what that stamp is gets the stamp, and of course, a cover from the person who has posted the stamp up. All of this has to be free of course.
To create a chain, we have a simple rule: the winning guesser has to put up a stamp that has at least one thing in common with the stamp they guessed, out of the following three:
1) Country
2) Year of issue
3) Theme.
This will give a clue to the next guessers and so on.
If the stamp is not guessed within 24 hours, the person posting the stamp here must give a clue.
And that's it!
And here is the first stamp:

Good luck and have fun here on Stampboards!

Cheers,
Joel.