Author: Ratko V Tomic
Date: 17:50:35 10/23/00
Go up one level in this thread
>>> GT has larger-than-life king safety scores. That >>> is all. No different search paradigm or anything else. >... > Christophe specifically said that the search is the same for both > programs. I took that as being true,as it seemed to match my > impression after watching games. It speculates more. But it > isn't searching _differently_ at all. There is quite a bit of space in between, to paraphrase your earlier comment, 'large safety score and nothing else' and your current one 'is not searching differently'. The hypothesis I sketched in the previous note is just one of many conceivable ways in between, where one can say 'the search is the same' (i.e. it is using the same iterative alpha-beta & support routines), yet the novelty cannot be said to be merely in a new leaf evaluator (or its weight) but it would be in a way how the inputs and outputs of the search are interacting across iterations via pre/post-processors, as well as how much information is transferred that way (is it just score, hash, history entries & killer moves, as in most programs, or something extra which helps GT make fewer mistakes in deciding to undertake apparently open ended king-side attack). While Christophe did say the search is the same (and one can parse that to mean many things; even Botvinnik's program had alpha-beta search in the lower layer), he also suggested, in response to dismissive comments about the GT style as being just another king safety tweak, that you're welcome to go ahead and increase the king-safety scores in Crafty and see how far that gets it.
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