Author: Nathan Thom
Date: 22:38:37 03/31/03
Go up one level in this thread
On April 01, 2003 at 01:01:19, Thomas McBurney wrote: >>>>>Wahoo! My engine LittleThought has finally beaten me in a game (at 5secs per >>>>>move) in which I didnt make obvious stupid mistakes. I guess that puts its >>>>>rating at about 1300 - still a way to go yet... >>>>> >>>>>All the bugs seem to be finally ironed out, now i can concentrate on building >>>>>the evaluation and telling it how to actually mate me with KRvK instead of >>>>>randomly wondering around the board! >>>> >>>it would if i had of given it more time per move, but with only a material/piece >>>square eval it didnt have a clue how to procede. > > > >>Only material piece square table for king in the endgame >>is enough to win KR vs K. >>The piece square table should tell the king to like the centre of the board and >>not the corner. > > >I had a small problem with this idea though. Although my program with the K+R >would successfully chase the opponents king away from the centre of the board >and chase it towards the corner. The problem then was it would not finish off >the job because my program didn't like to move its own king too far away from >the centre of the board. So my program would do it's best to corner the >opponents king with the rook while at the same time keeping its own king near >the centre, this of course does not lead to mate. But as I said earlier, this >is not a big problem because once you have the opponents king almost cornered it >is only a few ply’s away from being checkmated. This issue only showed up when >I had my program limited to 1 or 2 ply’s search depth. > > > >>If your engine has only 1300 then I think that it has big problems in it's >>search or bugs that you should correct before thinking about better evaluation. > > >He wouldn't be able to call it Little Thought if it had a better rating! > > >Cheers, >Tom. Thats right, it has a reputation to live up to :) But seriously, it searches about 20k-30k nps and at 5secs per move only reaches depth 7 or so most of the time. Im just guessing at that rating, i suppose it could be higher but only have myself to compare against - i was rated 1300 when i was 15, 10 years ago and am assuming all those drunken brain cells aint making me smarter :)
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