From: Albyn Jones REED EDU>
Date: 13 dec 1995
Subject: Re: IGS/ISS thread
Tim says:
>> From: Albyn Jones REED EDU>
>
>> there should be no significant differences in the rating algorithm.
>> one question is: what is the nominal difference between ranks? in
>> go i believe that a one stone difference in rank is presumed to
>> correspond to a winning probability of 2/3 for the higher ranked player.
>> is the traditional ranking system in shogi based on the same assumption?
>
>Well, this is already a significant difference in the algorithm. There
>is no idea about 'stones'. (At least the last time I played Shogi :) :).
>
:-)
>Yes, the basic presumption about the rating system is the basis for difference
>in rank. One stone is the same as one rank, or there abouts.
>
>So for Shogi games, a handicap game should not be counted. Because I do
>not know of any piece to rank difference off hand. I imagine there is one,
>just I am not sure how simple it would be. Also, in Go, the person who
>goes first gets a 0.5 advantage, where 1.0 == one stone. None of this
>makes sense for Shogi. Although, the person who does has the first move
>probably does have an advantage.
>
here's a suggestion, or two:
1) ignore color until you have collected enough data (results of games
between players of the same rank) to have a good idea of the effect.
2) let the rating algorithm estimate the effect of color :-)
3) ignore handicap games until you have collected enough data...
or maybe permanently.
in go, handicap games with more than a small number of stones
are usually really teaching games, and thus not informative about
player's relative strength. therefore, they should be ignored.
is there a similar tradition in shogi?
albyn