Author: Robert Hyatt
Date: 18:46:34 08/27/05
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On August 27, 2005 at 04:16:10, Daniel Shawul wrote: >On August 26, 2005 at 15:09:29, Robert Hyatt wrote: > >>I just released version 20.0. The only new feature beyond 19.20, is that the >>book files (*.bin) are now portable. That is, you can build a book on a >>big-endian architecture, and use it on a little-endian architecture. You can >>build a book on a 32 bit architecture, and use it on a 64 bit architecture. >>Etc. This was a sore point with me for quite a while... some systems/compilers >>make structures multiples of 8 bytes, some multiples of 4, some are big-endian, >>some are little-endian. In the 2004 WCCC blitz tournament, I gave peter a book >>that was made on my 32 bit systems, which produced some bizarre stuff on the 64 >>bit opteron. I decided to fix that. >> >>20.1 will be out as soon as I get all the bit renumbering done. Nothing new >>other than a very slight expected speedup due to the removal of the 63 - bit# >>translation required between the Intel BSF/BSR and the Cray LEADZ bit numbering >>schemes... >> >>20.2 and beyond are a planned complete revision of the Evaluation, but these >>changes will not be released publicly until after the next WCCC event... > >Any ideas on adding limited checks in qsearch? I know you have tried this before >and dumped it. But many people have found it to be useful at least to do checks >at first ply of qsearch. >daniel Hard to say. One thing I do differently from most is my check extension. I extend _when_ I check, rather than when getting out of check.. This immediately guarantees that I will _never_ enter my q-search with the side-on-move in check... I won't say I won't ever try checks again, it is easy enough to insert another function between Search() and Quiesce(), to do just this, without changing the existing Quiesce() at all...
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