Stockfish 4 - Win x64 and Linux binaries (official)

[Albert Silver]

It was an issue of contention and concern that the latest official Stockfish 4 package does not come with a standard Windows x64 build, much less Linux builds. As many know, there is a site where all these builds are made for the development versions:

Daily Stockfish development compiles

At it is, the latest date lists them as:

!! latest version !!

Author: Marco Costalba
Date: Tue Aug 20 09:01:25 2013 +0200
Timestamp: 1376982085

Stockfish 4

I am giving the full links here for future reference:

(BTW, the last time I found the development compile for Stockfish 3 to actually be faster than the one from the site)

Warning: when loading it into a GUI, the default settings have the Max Split Depth set to 0 (zero). All previous iterations had it at 7 so it may be a mistake.

Windows x64 for modern computers + sse4.2
Windows x64 for modern computers
Windows x64
Windows 32
Linux x64 for modern computers + sse4.2
Linux x64 for modern computers
Linux x64

[Marek Soszynski]

It was an issue of contention and concern that...

The issue was that the explanation and justification appeared, belatedly, buried in a forum rather than on the Stockfish website itself.

[RJN]

Warning: when loading it into a GUI, the default settings have the Max Split Depth set to 0 (zero). All previous iterations had it at 7 so it may be a mistake.

I installed SF4 Win 64 sse 4.2 in Arena, and got defaults of:

Min Split Depth=0
Max Threads per Split Point=5


BTW, it's my understanding that having the min split at 0 now sets it automatically. Nice!

With the new automatic setting of split depth
instead of a default, the user no longer needs
guidance on setting the split point.

....

Also preserve the useful behavior of automatically set
"Min Split Depth" according to the requested threads,
indeed this parameter is too technical for a casual user,
so, when left to zero, we set it on a sensible value.

I'm curious how this is done, is it solely based on the threads setting, or are other factors also considered?

[carldaman]

Warning: when loading it into a GUI, the default settings have the Max Split Depth set to 0 (zero). All previous iterations had it at 7 so it may be a mistake.

I installed SF4 Win 64 sse 4.2 in Arena, and got defaults of:

Min Split Depth=0
Max Threads per Split Point=5


BTW, it's my understanding that having the min split at 0 now sets it automatically. Nice!

With the new automatic setting of split depth
instead of a default, the user no longer needs
guidance on setting the split point.

....

Also preserve the useful behavior of automatically set
"Min Split Depth" according to the requested threads,
indeed this parameter is too technical for a casual user,
so, when left to zero, we set it on a sensible value.

I'm curious how this is done, is it solely based on the threads setting, or are other factors also considered?

This is very confusing. What should the "Min Split Depth" be set to? Is leaving it as zero ("0") advisable?

Thanks,
CL

[Dr.Wael Deeb]

Warning: when loading it into a GUI, the default settings have the Max Split Depth set to 0 (zero). All previous iterations had it at 7 so it may be a mistake.

I installed SF4 Win 64 sse 4.2 in Arena, and got defaults of:

Min Split Depth=0
Max Threads per Split Point=5


BTW, it's my understanding that having the min split at 0 now sets it automatically. Nice!

With the new automatic setting of split depth
instead of a default, the user no longer needs
guidance on setting the split point.

....

Also preserve the useful behavior of automatically set
"Min Split Depth" according to the requested threads,
indeed this parameter is too technical for a casual user,
so, when left to zero, we set it on a sensible value.

I'm curious how this is done, is it solely based on the threads setting, or are other factors also considered?

This is very confusing. What should the "Min Split Depth" be set to? Is leaving it as zero ("0") advisable?

Thanks,
CL

It's functioning automatically according to your hardware.....

At least I understood that much from the above bold statement....
Dr.D

[mcostalba]

Warning: when loading it into a GUI, the default settings have the Max Split Depth set to 0 (zero). All previous iterations had it at 7 so it may be a mistake.

It is not a mistake. Leave it to zero, SF will choose the best one.

[Albert Silver]

Warning: when loading it into a GUI, the default settings have the Max Split Depth set to 0 (zero). All previous iterations had it at 7 so it may be a mistake.

It is not a mistake. Leave it to zero, SF will choose the best one.

Will do, thanks.

[zullil]

I'm curious how this is done, is it solely based on the threads setting, or are other factors also considered?

Based on the thread setting. If threads >= 8 the min split depth := 7, otherwise min split depth := 4.

Code: Select all

  size_t requested        = Options["Threads"];

  assert(requested > 0);

  // Value 0 has a special meaning: We determine the optimal minimum split depth
  // automatically. Anyhow the minimumSplitDepth should never be under 4 plies.
  if (!minimumSplitDepth)
      minimumSplitDepth = (requested < 8 ? 4 : 7) * ONE_PLY;
  else
      minimumSplitDepth = std::max(4 * ONE_PLY, minimumSplitDepth);