Author: José de Jesús García Ruvalcaba
Date: 16:18:36 01/29/99
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On January 29, 1999 at 19:06:33, Melvin S. Schwartz wrote: >In your review of the Novag Diamond 11, you stated that Selective Search added >about 100 points to the rating of that machine. You claimed that Novag stated >that and that from your experience it was true. I own a Mephisto atlanta - which >you haven't reviewed yet and has a Swedish ELO rating of 2280 which is higher >than the Novag rating of 2220 - and when I contacted a Saitek tech guy in Hong >Kong, he said that Brute Force was stronger than Selective Force and gives a >higher rating. In the manual of my Mephisto, it states: >"The program in this chess computer normally uses a Selective Search algorithm. >This allows the computer to see combinations that would otherwise take much >longer to compute. Turning this option off by choosing -SEL makes the program >switch to a powerful Brute Force algorithm. This search method minimizes the >risk of an occasional oversight. >Note: The Problem Solving Levels always use the Brute Force method." > >Since the Novag Diamond 11 has both Selective Search and Brute Force, it would >appear that someone is wrong! What is interesting is the fact that the Mephisto >uses Brute Force in the Problem Solving Levels. However, that is not playing a >game of chess from the start. But the manual does indicate that the Brute Force >option takes longer but will minimize an occasional oversight and states that >Selective Search computes faster. Since Brute Force spends MORE time analyzing >the position, wouldn't it then seem logical that Brute Force is stronger and >would produce a higher chess rating? Your comment or anyone elses would be >appreciated. >Thank you, >Mel The brute force method will NOT spend more time to move on *average*. Both search alforithms have different policies to manage the time they are allotted, that is the difference.
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