Author: Robert Hyatt
Date: 06:58:05 11/01/05
Go up one level in this thread
On October 31, 2005 at 14:37:22, Vincent Diepeveen wrote: >On October 31, 2005 at 12:53:33, Robert Hyatt wrote: > >>On October 30, 2005 at 04:21:05, Mridul Muralidharan wrote: >> >>>On October 28, 2005 at 22:32:05, Robert Hyatt wrote: >>><snip>> >>>>Now it is "dubious forward pruning won't work". Of course, Shredder, Fruit, >>>>Zappa, Chess Tiger, and others all apparently have it working quite well... >>> >>>Are you sure that Zappa is using forward pruning ? >>>I did not see Anthony Cozzie mention this anywhere (for WCCC'05) ... >>>Ofcourse , I am not talking about null move here. >>> >>>- Mridul >> >> >>He had mentioned it somewhere along the way, yes. I think that was the addition >>to produce zappa 2.0... Anthony can comment, but the search depths he has >>reported during the WCCC certainly support that as well... >> >>Any program that is going beyond 14 or 15 plies in middlegame positions is doing >>forward pruning beyond pure null-move... > >Bob, perhaps start reading back old postings. > >Your memory is in a far state of deterioration. > >Zappa got 14-15 ply first moves out of book at 4 processors with 3.3 - 4 million >nps. > >So if you would say he's getting that with singular extensions turned on, then >that makes more sense than saying he's getting that with forward pruning other >than nullmove. Depends on the time control. But did you read what I _wrote_? And I quote: "any program going _beyond_ 14 or 15 plies in middlegame positions is doing forward pruning beyond pure null-move..." Do you see that "_beyond_" in the quote? Didn't think so... > >Fruit single cpu at 1 mln nps is getting typically 16-17 ply in those positions. > >First move out of book Zappa was obviously outsearched many plies by about >everyone. who cares about first move out of book. Care to bet whether zappa is using any forward pruning or not??? Care to bet whether Anthony and I have compared search times for the same positions, using my 8-way WCCC box I had for the WCCC? I'd rather have a deteriorated memory than a non-existant reasoning capability... > >Vincent
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