Author: Bo Persson
Date: 11:16:09 12/22/99
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On December 22, 1999 at 04:22:52, blass uri wrote: >I tried to generate the KR vs KNP tablebases and I cannot do it because my >computer has only 256 Mbytes in the main memory(no problem of memory in my >harddisk). > >I saw that even 512 Mbytes are not enough > >it had no problem to generate tablebases of KQN vs KR after many hours >and my logic says that I need more main memory for this endgame >because in KR vs KNP tablebases it is possible to solve 48 different KRP vs KN >tablebases based on the place of the pawn so it needs only 1/48 of the memory. > >It seems that the tablebases generator does not work in a smart way and instead >of generating 48 different tablebases for the cases that there is a white pawn >at a7 and ideas like this must generate all the positions at the same time. > >I have 2 questions > >1)Did nalimov use a machine with more than 512 Mbyes main memory to generate the >5 men tablebases with pawns? > >2)Is it possible to generate the 5 men tablebases without enough main memory but >only with enough memory in harddisk and the problem is only with the chessbase >TB move generator? It seems like it is not only a matter of RAM but also depends on the OS. With Nalimov's program, I have not been able to use more than 255 MB of virtual memory under Windows 95/98. Not even when I borrowed extra modules to get 384 MB of physical memory. I'm sure Nalimov used Windows NT on his big machines. >Uri
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