Author: Albert Silver
Date: 19:54:11 04/22/01
Go up one level in this thread
On April 22, 2001 at 19:40:47, James T. Walker wrote:
>On April 22, 2001 at 15:24:00, Christophe Theron wrote:
>
>>On April 22, 2001 at 14:48:56, Robert Raese wrote:
>>
>>>On April 22, 2001 at 13:51:44, Christophe Theron wrote:
>>>
>>>>On April 22, 2001 at 13:24:19, eric guttenberg wrote:
>>>>
>>>>>Mike,
>>>>>
>>>>>I don't know what selsafety is, though I suspect it may have something to
>>>>>do with king safety. It is found in the Chess Tiger notepad which is in
>>>>>your Rebel file. The default value is 6; several people have changed the
>>>>>value to 12 and have reported improved winning percentages. Christophe
>>>>>Theron responded to one such report by saying he would take a look at
>>>>>it in his work on the Tigers. I don't know if there is any consensus
>>>>>from Tiger users as to whether using the Selsafety value of 12 is
>>>>>better or not, but it does appear possible.
>>>>>
>>>>>
>>>>>eric
>>>>
>>>>
>>>>
>>>>You will find the "SelSafety" line in a file named CT.INI, which is in the
>>>>program's installation directory (typically C:\Program
>>>>Files\Rebel\Rebel-TigerII).
>>>>
>>>>It has nothing to do with king safety.
>>>>
>>>>It is about Selectivity Safety. Higher values give a better safety to the
>>>>selective algorithm (at the cost of slowing the program down). Lower values
>>>>increase the effect of the selective system, speed the program up, but also
>>>>increase the risk of selectivity errors (missing an obvious tactical shot for
>>>>example).
>>>>
>>>>The default value of 6 was optimal at the time we released Chess Tiger 13. I
>>>>have not tried to change this setting in Chess Tiger 14, so it is not impossible
>>>>that given the other changes in the engine another default value would perform
>>>>better.
>>>>
>>>>I hope I will get enough feedback on very long matches (400 games or more) to
>>>>figure this out.
>>>
>>>how does the time control for these test games influence the result?
>>>
>>>usually i play tiger at ICC with time control of 5 minute blitz. if i want to
>>>know if the +12 setting is stronger at game in 5 + 3, is it necessary to test at
>>>that time control, or can information about that be extrapolated from the tests
>>>at longer time controls?
>>
>>
>>
>>I think you can safely extrapolate in this particular case, due to the nature of
>>the parameter in question.
>>
>>But we are not absolutely sure about the efficiency of the new parameter value
>>at this time, so don't jump on it blindly.
>>
>>
>>
>> Christophe
>
>
>I don't have the statistics right now but my test at G/5 min show Chess Tiger
>14.0 losing to Fritz 6e after 40 games (SS=12). The default Chess Tiger 14.0
>leads my Blitz database rating after more than 550 games by a wide margin over
>Fritz 6e.
>Jim
What about Gambit 2.0?
Albert
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