Octochess r4529

[Codesquid]

4 MB, independent on whether it's compiled as 32bit or 64bit program.

[lucasart]

After almost a month since the first release, there's finally a new version of Octochess.

Changes:

• Improved playing strength
• Experimental UCI implementation
• Many small bugs fixed
• Add alternative popcount implemention for systems without POPCOUNT.
• If compiled as 32bit program, clamp transposition table size to 1GB
• Some code refactoring

You can download the new version from http://octochess.org/octochess-r4529.7z, the archive contains both Windows and Linux binaries.

Could you implement the Hash command ? By default OctoChess seems to take over 1 GB or RAM, which means it's not possible to compare it to other engines accurately (I use 64 MB of Hash in my rating list).

[lucasart]

I played some test games against Nejmet and it seems of similar strength.

Jim.

I have played some games too:

Code: Select all

Octochess r4558 x64 - Nejmet 3.07 : 22,0/27 19-2-6 (11=1111===111111111=110=110)  81%  +252

and I see here a quite different result

This is strange. Did you make sure they were using the same hash size ?

[Jim Ablett]

I played some test games against Nejmet and it seems of similar strength.

Jim.

I have played some games too:

Code: Select all

Octochess r4558 x64 - Nejmet 3.07 : 22,0/27 19-2-6 (11=1111===111111111=110=110)  81%  +252

and I see here a quite different result

This is strange. Did you make sure they were using the same hash size ?

I'm at fault here. I made an assumption based on watching about a dozen test games with 32 bit version.

Jim.

[Codesquid]

Could you implement the Hash command ?

Already working on this.

[Codesquid]

Could you implement the Hash command ?

Already working on this.

It's in the repository.

[geots]

4 MB, independent on whether it's compiled as 32bit or 64bit program.

Thank you for taking the time to help me. I appreciate it very much.


Best,

george

[Werner]

Example for 256MB hash:

Code: Select all

octochess.exe --hash 256

...can you please give an example how this works in Arena??

I can't, I'm not familiar with Arena.

... and why does the engine sometimes in an endgame use more than 1CPU? I sometimes saw 100 % cpu usage on my quad here??

Octochess is multi-threaded. First root node is searched single-threaded, the other root nodes are searched in parallel. You can control the number of search threads with the --threads argument.

ok, this is the reason I have had such different results. I could not see the mp feature. This is normally a uci command too. So if you don´t implement it, we cannot test the engine. I am afraid I have to throw away my played games as I wanted to ply only single threaded games (1CPU - 1CPU). As you read before I too was not able to set the hash command...

best wishes
Werner

[Werner]

Hi Tim,
here the 64bit version does not start in console mode with this command:
octochess-r4558-64-ja.exe --hash 256

[geots]

Example for 256MB hash:

Code: Select all

octochess.exe --hash 256

...can you please give an example how this works in Arena??

I can't, I'm not familiar with Arena.

... and why does the engine sometimes in an endgame use more than 1CPU? I sometimes saw 100 % cpu usage on my quad here??

Octochess is multi-threaded. First root node is searched single-threaded, the other root nodes are searched in parallel. You can control the number of search threads with the --threads argument.

ok, this is the reason I have had such different results. I could not see the mp feature. This is normally a uci command too. So if you don´t implement it, we cannot test the engine. I am afraid I have to throw away my played games as I wanted to ply only single threaded games (1CPU - 1CPU). As you read before I too was not able to set the hash command...

best wishes
Werner

Werner, if you are saying I cannot run the engine on 1 CPU, that leaves me out also. I have 4 cores, bust most of my testing is 1CPU.


Best,

george