create a thread containing the names of the 2 players
both opponents generate a 10-codepoint random string somehow. it should be securely-ish generated.
their move (rock, paper or scissors) should be appended, with a space between
they take the sha256 hash of this string. they both post this.
once this has happened, they post their original strings. these must be verified to have the correct hash. once this has happened, the score is posted and the game continues, probably forever.
update the title with the score