Author: Bas Hamstra
Date: 15:38:30 06/19/01
Go up one level in this thread
On June 19, 2001 at 12:46:36, Robert Hyatt wrote: >On June 19, 2001 at 12:20:36, Vincent Diepeveen wrote: > >>On June 19, 2001 at 12:08:36, Gian-Carlo Pascutto wrote: >> >>>On June 19, 2001 at 12:05:33, Bas Hamstra wrote: >>> >>>>The Deep Blue clone FriarTuck >>> >>>I feel like the last few days of refuting Vincent's post here >>>have been void. >>> >>>FriarTuck is crafty with singular extensions. Not Deep Blue. >>>It runs 500Knps, not 200Mnps >> >>but my modifications have made crafty nearly as inefficient as deep blue >>was searching. I'm not saying crafty is tactical as strong at the >>same depth as DB was. What i'm saying is that the overhead it >>requires to get near a depth n is more near the overhead of what DB >>needed to get to a depth n, because nowadays very few who post >>here can still imagine how bad those days were when one >>didn't have nullmove and no shared hashtables. >> >>Best regards, >>Vincent >> >>>-- >>>GCP > > >Vincent... give it up. I used null-move to win the 1983 WCCC tournament. It >has been around for a _long_ time. Just because they chose to not use it >doesn't mean they are stupid. They _chose_ to not use it. Just like I >_choose_ to not use the double-null-move stuff because it isn't very efficient >to do so... > >There is a difference between "choosing to not do something" and "not knowing >enough to do something". A _big_ difference. > >This experiment is folly from front to back, and is pointless... Nah, where is your sense of humour? GianCarlo is just testing his CraftySE implementation against Tao and it's doing all right. I must say I had expected a SE Crafty without nullmove, but alas, no. A few impressions: It seems as if it plays more active than the standard Crafty. Also I have the impression that it defends better against king attacks. The standard Crafty is pretty blind for it and tends to panic. It won a few games by tactical shots. Tao won a few games by tactical shots. Mostly FriarTuck won endgames, when the SE were disabled and Tao sucks. Outcome: 6-2 for Deepest Blue. I hate to say it, but this proves clearly that Tao is worse than Kasparow. Of course, in the light of my discussions here, I still do believe any SE implementation WIHTHOUT nullmove (or similar pruning) is totally inefficient. As soon as GianCarlo beats Tao with his SE Crafty with nullmove disabled I will retract that statement in public :-) Best regards, Bas.
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