Author: Christophe Theron
Date: 07:31:31 03/16/02
Go up one level in this thread
On March 15, 2002 at 16:40:55, Uri Blass wrote:
>On March 15, 2002 at 13:50:33, Christophe Theron wrote:
>
>>On March 15, 2002 at 02:38:05, stuart taylor wrote:
>>
>>>On March 14, 2002 at 08:03:23, Gian-Carlo Pascutto wrote:
>>>
>>>>On March 14, 2002 at 07:54:14, stuart taylor wrote:
>>>>
>>>>>I've lost contact with all information, since I went away 4 months ago. I've now
>>>>>been back two weeks, but can't see anything concrete.
>>>>>Shredder 6.0, Fritz 7.0 look like they are quite compatible with the recent
>>>>>Tigers, but not better. Deep Fritz looks a little below the top now, but only
>>>>>slightly.
>>>>>When will there be something clear?!
>>>>>So Fritz, Shredder and Tigers are about equal top now?
>>>>>
>>>>>What's in plan now? anything which might break away from the pack?
>>>>>
>>>>>I'm sorry to ask these obvious questions, but I simply can't see what cokking at
>>>>>the momment. Results and reports which are posted I often can't understand.
>>>>>S.Taylor
>>>>
>>>>I think a lot of people are anxious to see the next Tiger, but
>>>>Christophe is refusing to give any expected arrival dates.
>>>>
>>>>It'll be interesting to see how Fritz 7 does in the next SSDF
>>>>list. I would expect it to be a bit (say 20-30 elo) stronger
>>>>than the ChessTigers, but that could be totally off too.
>>>>
>>>>--
>>>>GCP
>>>
>>>I suppose what we really want to see is Fritz 8.0, as Mr. Morsch was explaining,
>>>that Fritz 7.0 has much more knowledge, but speed got left behind, which he will
>>>correct in Fritz 8.0.
>>>So if Fritz 7.0 is even now the top of a comprehensive rating list like ssdf,
>>>then fritz 8.0 would REALY be the ideal program.
>>>Speed within the software itself sometimes seems to be more effective than
>>>merely multipliyng Mhz,Ghz, with the hardware, although I'm not familiar with
>>>all the technical workings of it. That's just my observation.
>>>If only this can be done right now!
>>>
>>>Christophe, can you just hint something about what's going on with your
>>>programs?
>>>I don't know if you have said anything during the last 4 months!
>>>S.Taylor
>>>S.Taylor
>>
>>
>>
>>Well I'm glad that you ask. Usually people just ask about the release date of
>>the program, without apparent interest for what will be in it.
>>
>>What's going on with Tiger since version 14.0 is that unlike the previous years
>>I have worked a lot of the EVALUATION of the program. I have tried to work on
>>evaluation holes (mising knowledge about positional features) and tried to fill
>>these holes with good chess knowledge.
>>
>>For example there is much more endgame evaluation in Tiger 15. Also better
>>evaluation of the bishop pair (it took approximately 2 months of extensive
>>research).
>>
>>I have worked on search algorithms less than the previous years because as I
>>said above I focused on the evaluation function. However Tiger15's search is
>>already better than Tiger14's. I'm getting a much better search depth in the
>>endgame for example, and many selection holes have been fixed. I also get better
>>results when mates combinations start to appear on the board.
>>
>>Overall I have the feeling that Chess Tiger 15 will not be much better than CT14
>>in fast games, but that the difference will be clearly seen at long time
>>controls because of better stability (reliability) of the evaluation and less
>>selection holes.
>
>I do not understand
>I remember that you say that fixing the evaluation is more important for palm
>tiger because the difference is bigger when you cannot search deep enough so
>I thought that there is going to be bigger improvement in blitz based on your
>posts.
>
>Uri
There are different categories of knowledge.
It looks like when you are really lacking depth (Palm version, searching 5-6
plies in blitz but only 3-4 on some moves) you have to add knowledge aimed at
avoiding tactical traps (better evaluation of pins for example) because you
can't even see them by search. I would call this "tactical knowledge".
Then there is a stage when your search depth starts to be enough to avoid most
tactics (say 10 plies and up). At that point what you need the most is long term
positional knowledge. The kind of knowledge to tell you that you are going into
a won or lost endgame for example, or that this weakness is going to hurt you
until the end of the game.
In the new Tiger I have been working more on long term positional knowledge.
In blitz games tactical abilities are more important. In long games, long term
positional knowledge plays a bigger role, and that's why I expect the gains to
be more obvious at long time controls.
Christophe
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.