Re: [Bug-gnubg] Even, odd and half plies (WAS: New Contact Net Error Rates)

[Joseph Heled]

Nis wrote:

It seems your idea has lot's of merit. Sorry for being skeptical at first.

> > I will check that.
>
>
> Just out of curiosity: How?

That's what benchmarks are for, and we have put a lot of work into 
generating one.
The benchmark is far from perfect, but still very useful.


107485 contact benchmark positions
 0Ply error - 0.01079  (w = 0)
 1Ply error - 0.00956  (w = 1)

 w * ply1 + (1-w) * ply0

  w = 0.5   error - 0.009176
  w = 0.75  error - 0.009155
  w = 0.625 error - 0.009066
  w = 0.57  error - 0.009070
  w = 0.67  error - 0.009071

Conclusions:

  - 1ply does play contact positions better after all.
  - 1.5 ply is better yet. The best w is around 0.6

I need to see if the same applies to crashed, and I wonder what the race 
result would be. It takes time to do those 1ply evaluations ...

-Joseph