Author: James T. Walker
Date: 05:32:37 04/23/01
Go up one level in this thread
On April 22, 2001 at 22:54:11, Albert Silver wrote: >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 Hello Albert, What about Gambit 2.0?? I have not tried SS=12 with Gambit. Gambit is #2 on my Blitz database after 500 games right behind CT14. The "Standard" database is different with Gambit as #1 and Chess Tiger 14 as #2. Of course I don't have many games at the longer time controls. Jim
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