Author: Robert Hyatt
Date: 20:24:04 03/27/00
Go up one level in this thread
On March 27, 2000 at 11:27:54, Christophe Theron wrote: >On March 27, 2000 at 09:08:59, Robert Hyatt wrote: > >>On March 26, 2000 at 11:45:38, Christophe Theron wrote: >> >>>On March 25, 2000 at 23:13:49, Tina Long wrote: >>> >>>>On March 25, 2000 at 14:28:13, James Robertson wrote: >>>> >>>>>On March 25, 2000 at 13:41:28, Roger wrote: >>>>> >>>>>>Would tablebases for Tiger have changed this result at all? >>>>>> >>>>>>Roger >>>>> >>>>>Maybe a quarter of a point.... My experience with tablebases is that if the >>>>>program is moderately smart it doesn't benefit tremendously from them. >>>>> >>>>>James >>>>> >>>>Ed Schroder said about 6 months ago that Tablebases were worth about 10 points >>>>on the SSDF scale. >>>> >>>>I'm 70% sure he said that! I'm 100% sure that Ed said once that something was >>>>worth very little rating points. >>>> >>>>I'm glad I could add some real detail to this discussion. >>>> >>>>Tina Long >>> >>> >>>As far as I know, endgames are not Tiger's weak point. >>> >>>One thing I'm sure about: as far as playing strength is the subject, I have a >>>long list of ideas that, in my opinion, will give much more than tablebases. >>> >>>It does not matter if tablebases are easy to implement or not (they are not, >>>unless you want to do it the dirty way, and I won't), I don't see the point in >>>working on this before I fix more important things. >>> >>> >>> >>> Christophe >> >> >>I am not wild about helping the competition, but you have one huge hold. You >>don't know that KPB vs K is a draw if the wrong colored bishop is on the board. >>Ditto for KPPB vs K, assuming all P's are rook pawns. I have seen Crafty draw >>lost endings when you let it swindle you into such an ending. One ending >>was you had a king, and pawns on a and b file + wrong bishop. Crafty had a pawn >>on the a file. It pushed and you took with your b pawn rather than just pushing >>past it and winning... >> >>Consider that my tip of the year. :) >> >>There are others. But I also have them too. :) > > >Well... Thanks Bob. > >I thought Tiger knew about KBP vs K, but I'll check again. Or maybe you noticed >this on an old version of Tiger. > >I admit I still have to cover some of the other cases. I'll probably do it, as I >prefer to have the knowledge than to rely on endgame databases. Tiger will >eventually have EGTB support, but I want to allow my users to not load them on >their hard disks. For many occasional players, it does not make sense to stuff >their disks with 1Gb of chess databases. > > > > Christophe Note that it was KBPP vs K... you had _two_ pawns on the a file... that is usually what screws everyone up here except for us bitmappers, as the way I do the test will work the same with 1 or 6 pawns on the a file. :)
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