Author: James T. Walker
Date: 16:40:47 04/22/01
Go up one level in this thread
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
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