Author: Vincent Lejeune
Date: 14:34:28 09/08/02
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from Eugene Nalimov on the Crafty maling-list : """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" I built all but two 3+3 and 4+2 pawnless TBs; last two are being generated right now. There is a problem with transferring them to Bob's site, so I am thinking about sending hard drive to him by mail. There is extra problem, as I had to modify TB access code when I started generate general 6-men pawnless TBs. Old code was not capable of accessing them due to some issues on 32-bit architectures. And then I had no time to clean that code, so it is still not released. Probably soon... Yes, current version of generator is able to resume TB generation after it was interrupted. I implemented that feature after generation of some large TBs was several times interrupted when power was lost due to the fall storms. That version of generator also uses more efficient algorithm. It is both faster and uses much less memory. It's possible to generate all 5-men TBs on a computer with 96Mb of RAM. Also, generator can use several CPUs on the SMP systems. It's possible to generate all pawnless 6-men TBs on an x86 system with only 1Gb of RAM. Of course you'll need ~40Gb of free disk space for some of the TBs. I hope that soon I'll release generator source as well... Thanks, Eugene """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" On September 08, 2002 at 13:32:31, Olaf Jenkner wrote: >On September 08, 2002 at 07:33:54, GuyHaworth wrote: > >> >>The practice of generating 6-man EGTs not only generates the EGTs but generates: >> >>- experience in generating EGTs >>- awareness of the problem that distribution of the information is not easy >> >>New ideas are coming forward from time to time, and these will be even more >>useful for larger EGTs. >> >>e.g.: If we had a GIMPS- or SETI-like distributed-community approach to >>generating EGTs, an HQ distributing the remaining unsolved problems, we would >>not be taking years to generate 6-man EGTs. >> >>We are not using parallel computers ... or distributed communities yet. >> >>Nor are we generating DTC or DTZ EGTs (which involve smaller depths and >>therefore less space), or getting a better compression in 'real-time versions of >>the EGTs' by setting 'broken' values' to 'last seen' values. >> >>This last is admittedly a 'finesse' and assumes that no 'broken' positions are >>enquired about - or at least that the access-code checks for 'broken positions'. >> >>g > >Distributed generation will not work. Even clusters can't be used >to generate EGTB, as Bob Hyatt wrote some time ago. > >Olaf Jenkner
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