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Up Topic The Rybka Lounge / Computer Chess / Question for Robert Houdart
- - By kgburcham (***) [us] Date 2012-02-19 19:30
Is there a strength difference in analysis vs normal clock control?
If the time setting controls the move every 5 secs vs a manual move every 5 sec using analysis mode.
Also lets say both examples control to same depth. Both examples with ponder on.
thanks
kgburcham
Parent - - By Uly (Gold) [mx] Date 2012-02-19 19:42
Houdini uses Contempt for games so the results wouldn't be the same. To get the same result, set Contempt to 0.
Parent - By kgburcham (***) [us] Date 2012-02-19 20:17
In my example it would be all things equal.
First example with Contempt at 0 for both.
Second example with contempt at 1 for both.
I missed something in your reply Uly.
If contempt at 0 is better then why not for both.
Parent - - By Stonehenge (***) Date 2012-02-19 20:17

> Is there a strength difference in analysis vs normal clock control?


There are some differences in the search algorithm between analysis and game play mode.
Some examples:
- Contempt (by default disabled in analysis mode, but you can activate it)
- Reuse of hash values (analysis mode will more readily use hash values)
- Zugzwang detection (more advanced in analysis mode)
- Verbosity of the output (game play mode will send a lot less output to the GUI)

The strength difference between the two modes is minimal.
Parent - By kgburcham (***) [us] Date 2012-02-19 20:26
I had read this before but forgot some of it.
Thanks for the reply Robert.
Parent - - By Richard Vida (**) Date 2012-02-19 22:38
I dare to add
- "invalidating" hash entries when close to 50-move rule (at root)
Parent - By Banned for Life (Gold) Date 2012-02-19 23:48
This must be an undocumented feature! :smile:
Parent - By keoki010 (Bronze) [us] Date 2012-02-19 23:54
What about when it can't communicate with the gui "Aquarium" and hangs Aq up because it decided to exit? Multiple times and very repeatable! Pm me if you want specifics.
Parent - - By ernest (****) [fr] Date 2012-02-20 19:33

> Is there a strength difference in analysis vs normal clock control?


Sorry, kg, can't find that "clock control" parameter in Houdini 2...  :red:

Where is it?
Parent - - By Uly (Gold) [mx] Date 2012-02-21 00:30
In your GUI set the clock and play a game against the engine, or otherwise set it to play mode and tell it to move, that's what he meant with "clock control".
Parent - - By kgburcham (***) [us] Date 2012-02-21 00:45
thanks Uly.
Exactly, clock in Gui.
In the Fritz Gui, when you set the clock to seconds per move the program might take 3 or 4 times the clock setting.
Parent - - By Uly (Gold) [mx] Date 2012-02-21 01:13

> In the Fritz Gui, when you set the clock to seconds per move the program might take 3 or 4 times the clock setting.


Shredder Classic has "Exact time" so the engine is forced to move at the time specified.
Parent - - By kgburcham (***) [us] Date 2012-02-21 01:16
Yes I have used that "exact time" but I do not have a good bkt book for Shredder GUI.

thanks
Parent - - By Uly (Gold) [mx] Date 2012-02-21 01:37
You can make engines use Bin books via Polyglot adapter.
Parent - By mocha1961 (***) [us] Date 2012-02-21 14:06
+3. :cool:
Up Topic The Rybka Lounge / Computer Chess / Question for Robert Houdart

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