On 07/01/2012 19:30, Don Dailey wrote:

On Sat, Jan 7, 2012 at 2:03 PM, Jeff Nowakowski <[email protected]
<mailto:[email protected]>> wrote:

    On 01/02/2012 05:04 PM, Rémi Coulom wrote:


        Improving the KGS rank at 5d is very difficult. The current
        experimental version of Crazy Stone wins 78% against Crazy Stone
        2011. That's less than one stone difference on KGS. But I am sure
        both Zen and Crazy Stone will reach 6d in 2012.


    There are two problems with the KGS rankings:

    One, they are weighed down a lot by past games from weaker versions.

    Two, you have to worry about people trying to game the system. I
    found strong evidence that one of the frequent CrazyStone players
    was losing games intentionally against a weaker bot, while at the
    same time winning frequently against CrazyStone.


Why would someone do this?

As an admin, I waste enough time dealing with anti-social behaviour. I have learned not to waste more by speculating on its motivations.

   Is it a vendetta against CrazyStone or

If I am asked to speculate - I think he is doing this just because he can. He is strong enough to beat CrazyStone, but if that is all he ever does, his rating will rise until his wins are ineffective (or he is asked to give it enough handicap that he can't beat it). So he reduces his rating by bogus losses against another program.

could it be some kind of  pump and dump scheme?     What I mean is the
scheme where you basically give a bunch of your rating points to another
player for safe keeping,   recover them by playing normally against
other players, and then take them back from the original player.

Over-fanciful, I think.  Users certainly do what you describe, but they
don't use bots, they use others of their own accounts

  It's even possible that he operating the computer player he was using
which would make this easy to do.     The admin can probably check to
see if the login times frequently coincide or if this bot plays a lot of
other players or mostly just him.

He uses several computer players, all operated by the same person, whom I know and trust to act honestly.

And maybe it's just a coincidence?

If this is the user I think it is, there are too many losses for it to be coincidence.

Don


    I brought this up with an admin, and he said they were looking into
    it, but several days have gone by and the player was not deranked
    (which is the usual punishment for gaming the system, and would
    remove past games from the rank calculation).

I am suspicious, but at 3k I am not strong enough to spot suspicious moves in his losses against the weaker bot. I shall try to persuade a stronger admin to check on his losses.

Nick
--
Nick Wedd
[email protected]
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