[Bug-gnubg] Re: ratings formula, checker play vs. cube

[kvandoel]

 On Thu, , Robert-Jan Veldhuizen wrote:

>I'm  quite confident  the  "old"  way of  measuring  cube error  rates,
>dividing   by  totalCubeDecisions,  gave   a  more   realistic  result,
>especially in comparison to the  checker play error rate, which is also
>based on all unforced moves.

>>>It is also  inconsistent, because checker play errors  DO get divided by
>>>all unforced moves.

>>So what?   If anything I feel  that the checker play  total error should
>>maybe also be  divided not just by non-forced  moves, but by non-obvious
>>moves. THis is just harder to quantify.

>Indeed, but  my point  is that  as long as  this isn't  implemented, it
>would be  better not  to use  it for cube  errors either.  The relation
>between cube error rate and checker play error rate is IMO clearly more
>realistic when they are both calculated by using similar terms.

I  think you  are  still missing  the  point that  the contributions  of
checker play  errors and  cube play errors  are converted  to equivalent
rating  loss  INDEPENDENTLY.  There  is not  a-priory  relation  between
checker and cube errors.

Kees