Author: Vincent Diepeveen
Date: 17:35:34 09/19/03
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On September 19, 2003 at 15:55:41, Dann Corbit wrote: >On September 19, 2003 at 11:14:29, Vincent Diepeveen wrote: > >>Hello, >> >>I'm looking for positions to search very deep with a cpu or 500 which are >>interesting to search deep. Seemingly a whole machine must get reserved for DIEP >>world champs 2003. The NWO/NCF perhaps needs to pay for the cpu hours also >>during the night says SARA (there is 7 organisations involved and i have written >>at least 1 page for each processor to get it so i won't even start quoting all >>the organisations involved). >> >>Most jobs run like 2 weeks or so at say for example 32 processors, so all those >>jobs cannot get started trivially in the night. >> >>Anyway more negotiations will be there, because the world champs like this will >>cost 80000 cpu hours. >> >>This is all internal talks. In case any of such scenario happens or even between >>rounds when diep finishes sooner its games, there sometimes is a few hours left >>to run diep at 500 cpu's at for example 1 position each run. >> >>that's 250Ghz with around 200GB hashtables in total. >> >>So this allows some massive deep calculations. I'm looking for cool positions to >>try. >> >>Please don't mention the openings position, i'm already using that now and it >>isn't very interesting at all to search that one deep. >> >>feel free to email to me about this: diep@xs4all.nl > >WAC 230. >As far as I know, it still isn't really decided if the key move really leads to >a win. I saw some convincing draw argumentation. I would really like to know >once and for all if it is a draw or not. We all feel the truth about this position already and that's that Rb4 is the best move which black must TRY, but i feel it is a draw and a very convincing one. The major problem for searching this one is really all the passer moves that are possible real soon. That's like 20 passer moves for each side, the machine can search deep of course but 40 ply *additionally* + nullmoves belonging to it is a bit much. Note that a bit older diep versions all played Rb4 (current one doesn't). Based upon chances it has with passers. The evaluation difference between Rb4 and not playing it is very tiny. So a very very deep search probably won't go for Rb4 at all as it smells a bit chances for both sides in which case nullmoving in the root position is the best move it will conclude.
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