Hi Sylvain,
I'm not worried about the ELO situation but you are right. When skill
is measured by ELO you are talking about the probability of winning a
game against any given opponent, we just have to be careful how we
interpret or compare to other board sizes.
If 2 opponents are 50 ELO rating points apart in 9x9, they will be much
farther apart in the 19x19 game assuming their absolute strength
(whatever that means) stays the same at other board sizes.
The idea of changing the server to accommodate the kyu system
intrigues me. I might need a little help understanding this however
since I don't fully understand the kyu system.
Does a 1 kyu difference mean I can give you 1 stone if I am better and
expect to come out about even?
Does this all work out in a transitive way? If a 6 kyu can give a 7
kyu 1 stone, and the 7 kyu can give an 8 kyu 1 stone, can the 6 kyu
expect to play even with the 8 kyu player giving 2 stones?
Of course internally I would use fractions of a kyu or even ELO and
convert. I would probably need some help determining the right
formula.
At any rate, I am not willing yet to change CGOS to accommodate this,
I would have to add code to get the rating system working correctly as
well as code for setting up handicap games. If the 19x19 CGOS becomes
popular I would eventually change it over - especially since it would
allow pairing with handicaps to make all matches roughly equal.
Would this simple system work:
1. Start all players out at the same kyu rating.
2. Pair randomly.
3. If you win your match, modify kyu rating slightly down.
4. If you lose your match, slighly change kyu upward.
All this is applied on top of handicaps of course.
But unless 2 players are an integer kyu apart, a handicap would be
slighly
unfair to one side or the other. Is it sufficient to modify the
ratings in linear proportion to the amount of "unfairness?"
- Don
On Wed, 2006-12-13 at 04:48 +0100, [EMAIL PROTECTED] wrote:
> > GnuGo is another possibility and has the advantage of being a well
> > known quantity, but Gnugo fails to meet some of the criteria above
> > such as being too deterministic and using heavy resources.
>
> Hello,
>
> GnuGo at level 0 met almost all requirement I think. Perhaps too
> deterministic, but I even not sure. It is already relatively strong and plays
> very quickly.
>
> By the way, I have concern about the 19x19 no one mentionned I think. In
> 19x19
> the probability of winning between two players will be very often close to 0
> or 1. As the game is longer, if a player is better then his probability of
> winning is very big because he can repair his mistakes. Then the ELO could
> not be sufficent. Am I wrong? Perhaps you can use kyu rating, setting
> handicaps (and one advantage is that then the pairing system is simpler).
>
> Sylvain
>
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