Author: Christophe Theron
Date: 11:19:28 10/20/00
Go up one level in this thread
On October 20, 2000 at 04:07:13, Bruce Moreland wrote:
>On October 19, 2000 at 12:30:33, Christophe Theron wrote:
>
>>On October 19, 2000 at 02:54:31, Jason Williamson wrote:
>>
>>>On October 18, 2000 at 17:56:48, Brian Richardson wrote:
>>>
>>>>Perhaps it is missing the point, but why not just use EGTB (Endgame Tablebases).
>>>> The 3&4 piece sets are not that large. Then you can concentrate on early
>>>>endgame or other phases...
>>>
>>>Yace does use TB, but is there a problem with improving the engine's endgame
>>>play without it? How can it be bad.
>>>
>>>JW
>>
>>
>>
>>Anyway, you just have to add pawns on the A or H file and you cannot use TBs
>>anymore, when any human player can see (generally easily) if it is a draw or
>>not.
>>
>>These cases are not uncommon. Tiger 12 did not understand them, and the problem
>>has been reported to me several times. The program lost some games instead of
>>forcing white to double the pawns on the A or H file and get the draw.
>>
>>
>>
>> Christophe
>
>There are lots of cases that you can solve trivially, but if you then add a pawn
>for the weaker side, they are suddenly no longer solved.
>
>Cases in point are this KBP vs K problem, also KRN vs KR, KRB vs KR, and even in
>some dumb cases KN vs K and KB vs K.
>
>Just give the weaker side an extra pawn, and the weaker side has all of what few
>winning chances there are, yet many programs will return positive scores.
>
>KBP vs KP is a five-man problem, and I doubt most people would consider that
>table important. And if that is taken care of, there is still KBP vs KPP.
>
>bruce
Yes, the problem gets more complex with a pawn for the weak side.
But I was not even there. When I said "add pawns on the A or H files", I was
talking about pawns of the "winning" side (the side which has more material).
Christophe
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