Add more advanced pawn shelter/storm code

[glinscott]

The idea is based off of the Robbolito shelter/storm code. The king is penalized for the pawns in front of him moving away, and the enemy pawns advancing against him. If the possibility of castling exists, the minimum score of the castled king safety is used.

It certainly needs some tuning, and probably re-tuning of the king safety in general as well.

However, in the current state, it scores quite well at 8k games at 40/2 seconds on my core i7, 2153 - 1952 - 3895 (+9).

[glinscott]

Well, I'm not sure what git did for the last 3 commits, I will flatten the commits again if we go with this version.

I forgot to mention, but I tested against the version with the undefended rook bonus as well.

[mcostalba]

Wow, this is a huge patch ! I will add to my test queue. Thanks Gary.

[glinscott]

Yes, I was trying to think of how to break it down, but all the parts sort of play together. I'm attempting to tune it now, we'll see how it goes :).

[glinscott]

Ran 16k games at 40/2 seconds, result was 4203 - 4025 - 7772 (+4), after the recent updates. It seems to be performing much worse than before, although I'm really not sure why, as there weren't any changes I saw that could affect this.

This was against master with the undefended rook change in place. I'll try removing that, and re-run overnight.

[mcostalba]

On Mon, Mar 26, 2012 at 01:42, Gary Linscott
reply@reply.github.com
wrote:

Ran 16k games at 40/2 seconds, result was 4203 - 4025 - 7772 (+4), after the recent updates.  It seems to be performing much worse than before, although I'm really not sure why, as there weren't any changes I saw that could affect this.

This was against master with the undefended rook change in place.  I'll try removing that, and re-run overnight.

If you prepare a patch rebased against current master so that I can
pull easily of your best version of pawn storm I can start testing
this evening too.

[glinscott]

New pull on the way.