Author: Komputer Korner
Date: 11:31:31 08/15/98
Go up one level in this thread
On August 10, 1998 at 00:02:15, fca wrote: >On August 09, 1998 at 20:13:56, Christophe Theron wrote: > >>On August 09, 1998 at 19:18:52, Robert Hyatt wrote: >> >>>On August 09, 1998 at 10:22:31, Christophe Theron wrote: >>> >>>>Thorsten talked about this, but maybe it applied to older versions of Lang's >>>>programs. Nobody has given evidence that Genius selects differently its moves >>>>than the opponent's, except in the very end of the lines. >>>> >>>> >>>> >>> >>> >>>actually, several posted a few positions where Genius appeared to show an >>>asymmetric search. It couldn't find the key move with a very deep search, >>>yet if you play the key move and let it play the other side, it would find that >>>it was lost very quickly. Which lends credibility to the idea that it looks >>>at everything for the opponent, but prunes (forward prunes) its own moves >>>quite a bit in the right circumstances... >> >> >>I remember Thorsten said he would post some of these positions, but he didn't do >>it, or I just missed his posts. >> >>I would be interested to see such positions. If somebody has found such >>examples, would he be kind enough to repost them, please? > >I think there is a misunderstanding here. By Bob, maybe by Thorsten and others >too. > >Genius is highly "modularised." Depending on perceived game phase, a different >evaluation module (code segment - not just a couple of variables) is used. > >But... > >Which module to use is only set at root level. Within, the same module stays >used. > >So say the root move being considered would, if made, change perceived game >phase (not necessarily a capture, but usually so, I believe). While it is >examined - even to 32 ply depth - the lens used will still be for module x. >However deep the search. > >Now the move is chosen. So module y is now used. Alas, the evaluation is >significantly changed - i.e. Genius now "sees it" truly. > >This is the heart of the problem that is misdiagnosed as asymmetry (without >denying or confirming that such asymmetry exists :-) ). > >Kind regards > >fca This is a form of preprocessing albeit in a modular form. Effects should be the same in a lot of instances. What proof do you have for this of Genius? -- Komputer Korner
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