TalkChess.com

Do you really have the same problem again? Lose, lose, draw, lose, lose with MultiPV = 5 in the same position? hello syzygy, thx for your response :-) ...no, in the pos from above SF shows correctly Kc5 as the only drawing move and shows -153 or so for all other moves ProbeLimit was set on default ...

Do you really have the same problem again? Lose, lose, draw, lose, lose with MultiPV = 5 in the same position?

That is a good point, and one I had overlooked. Yes, block size is an optional parameter to DATACOMP.EXE. Importantly the default value is 64k, not the 8k which was the value, if I remember correctly, that was used to compress for the official release. Bob Hyatt has posted multiple times about his ...

Hmm. The potential of bit-rot of the Nalimov generator is curious (i.e. ranging from unexpected to mildly alarming). Given that Jonathan said he ran datacomp, and that his md5sum command is running against an .emd file, my suspicion is that datacomp has not survived the transition from 32-bit to 64...

So there is a pragma pack in the Nalimov code to ensure packing on a stated boundary so that the change from 32 to 64 bit addressing (or other packing rule such as one byte boundaries for space saving) had no effect? I did not see it in my copy of the code. Without ever having looked at the source ...

Great, thank you! Yes mine are larger. When I decompress the downloaded files, they are the same size as the generated files. I haven't checked the checksums, yet, but that looks like the answer. It certainly won't have anything to do with modern compilers "tending to pack on wider block sizes". Ho...

It is probably advisable to Limit the number of threads in this case to 16 or 32 at most. Why would you want to limit a CPU with 64 physical cores to 16 or 32 threads? For hash clearing purpose only, not for search. Clearing fi 16 GB with 16 threads should be sufficiently fast. But the Threads vari...

Joerg Oster wrote: ↑

Mon Apr 26, 2021 8:16 pm

It is probably advisable to Limit the number of threads in this case to 16 or 32 at most.

Why would you want to limit a CPU with 64 physical cores to 16 or 32 threads?

Ronald does this mean that in each group I have 32 physical and 32 logical threads? Cfish 110421 64 AVX2 NUMA by Syzygy based on Stockfish info string NUMA enabled. setoption name Threads value 64 go depth 10 info string Binding thread 0 to node 0 in group 0. info string Binding thread 1 to node 0 ...

Joost Buijs wrote: ↑

Sun Apr 25, 2021 5:42 pm

that's why I'm waiting for the Zen-3 Threadripper, when it arrives I will ditch the 3970X.

I'm afraid Zen-3 Threadripper will not happen.
(Hmm, apparently there are leaks about an August 2021 release date, but what are the chances that the chips will actually be available...)