Add boarder distance feature level

[dsmic]

I recognized, that the boarder distance feature has even at distance 4 still quite a large feature value. Maybe we should add additional levels.

[Francois van Niekerk]

According to my experiments, the weight for level 4 is very close to 1. What weights are you getting?

[dsmic]

The gamma file I used resulted from my own run of harvest on 1315 pro games (if I remember correctly) has 1.7. This is the one I used running slow bot.

[Francois van Niekerk]

That is curious. It should be relatively easy to increase the number of features levels (just adjust BORDERDIST_LEVELS) and see if it helps.

[dsmic]

Yes, thats why I called it trivial:) As I read you were adding levels anyway I wanted to remark this. Just in case you run new harvests anyway. I am fighting with self learning at the moment, so I will not add the level at the moment, as it makes the understanding more difficult.

[dsmic]

Which training set were you using for the near 1 result?

My self training on 13x13 seems to even increase the 4 boarder distance:)

[Francois van Niekerk]

I have been mostly testing on high-dan games from KGS.

[dsmic]

the full set of 100000 games?

[Francois van Niekerk]

No, subsets of varied sizes, depending on other factors.

[dsmic]

Probably not so important as to hold a bug open. In simear importance than other ideas of improved features