Rybka Chess Community Forum
this has been discussed many times on the forum.my own belief is that after d20 displayed we are looking at at least d24.many engines show extentions and say in some lines an engine is looking down certain lines to say for example d40 this is an arbitrary number,but you guys know what i mean.IMHO Rybka looks also down these extentions as well but does not display them and that is why you feel Rybka sort of locks up.from experience i can say that Rybka does not lock up.atm i believe i have biggest computer on the forum(it could change in a few days or weeks)and i am having similar probs in a difficult position however i also have a Skully to run alongside it from position x.all i can say is that after a long delay(hours) my 12 core is looking 1 move deeper than my Skully.i would welcome other peoples opinions.
Either R4 locks up or Aquarium locks up. I don't think it's Aquarium because I can change the analysis engine and everything is fine. In Aquarium when the little green square icon for an engine turns to brown, Aquarium isn't communicating with it. This has happened numerous times when doing analysis. Also it's not very repeatable.
Paul uses the CB interface as far as I know.
> In Aquarium when the little green square icon for an engine turns to brown, Aquarium isn't communicating with it. This has happened numerous times when doing analysis.
As the question was asked of me- so I ask it of you ! Are you using multiple single core engines for the analysis?
It's almost never good when things are turning brown...
Like they say up in the mountain cottages- if its yellow, let it mellow- if it's brown flush it down!
> As the question was asked of me- so I ask it of you ! Are you using multiple single core engines for the analysis?
I use multiple single engines in IDEA, however in IA I use mpv and single pv, exclude and multiple engines. It crashes usually in mpv or spv and usually hangs when it has a check to evaluate.
Check with Dadi in Aquarium forum on this, I don't think it is hanging or crashing- it's probably the way you are using multiple engines in analysis.
Nope, it does exactly what other users have said.
All the more reason to express this issue on the Aquarium forum!
It does the same in other gui's
How does R3 or SF behave compared to your Skully?
Should I upgrade? ;)
SF will only run on max of 8cpu.from start position on 6 min run i get.
skully 7385 kN/s
new comp.12,150 kN/s
these figures are with 1024 hash,if you reduce hash it will run faster.
Too bad R4 doesn't seem to benefit. With its more selective behavior you would expect it to be a monster.
Have you tried R3?
not sure what you mean by R4 not benefitting from faster comp.BigBen had R4 running at just over 1000 kN/s on my computer at start position.
I missed that, on 4cpu i think R4 reaches 400kn/s.
However, you mentioned above that R4 was only 1 ply deeper than your skully after hours. That seems disappointing right?
i think this was at d29 and d30 from a set position.it would depend on complexity of position and in itself is pretty meaningless.
You can to have Stockfish 17.1-16-64; it work with 16 cores max.
I am running it on 12 cores, and work well:http://computerschess.blogspot.com/2010/09/ensamble-testeo-y-montaje-de-un-server.html
1 Motherboard EVGA Classified SR-2
2 Microprocesadores Intel Xeon x5650 @ 4.2 GHz
2 Módulos de memorias 3x2gb DDR3 Gskill 2000Mhz RIPJAWS Cas9
2 Discos WD Black 1Tb sata3 (6Gb/s) 64mb buffer WD1002FAEX Sata3
1 Disco SSD Gskill Phoenix Pro 60Gb FM-25S2S-60GBP2
2 Coolers Thermalright TRUEBKREVC Ultra 120 eXtreme Black Rev. C
4 Fans Ultra Kaze Scythe Slip Stream 120mm 1900rpm 110cfm 37dBA
1 VGA Sapphire HD5750 1GB GDDR5 Vapor-X
1 Fuente CoolerMaster 1100W UCP RS-B00-AAAA-A3
1 Lectograbadora externa Asus USB SDR-08D1S-U
1 Case casero de acrílico
i have just done a fresh download of SF 1.7.1.you cannot set it above 8 threads( 8 cpu).i think you are mixing up CPU with Hyper-threading.i run 12 cpu with HT(24 threads) switched off.you are running it appears with HT on.it actually slows Rybka down which has been mentioned many times on the forum.
12 cores - 24 threads.
If you give me your email adress, i can send you a special compile Stockfish for more 8 cores. Max. 16 cores.
It was special compile for 12 cores or more by Jim Ablett at our request.
Thanks for the link to the pictures. That's some serious hardware! (Not sure I'd be allowed to build something like that in the house...)
I could probably pull it off in the basement.
Need good air in basament, or watercooling.
No, no no! Put your wife in the basement and the chess computer in the living room!
Imagine my wife... I have others machines working.
56 cores working on IDeA is much noise!
great, push it to the limit go for 100 cores. I know you can do it =)
If you dont mind me asking how much does a machine like that cost?
1 placa base EVGA Clasificado SR-2 u$s 600.-
2 Microprocesadores Intel Xeon firstname.lastname@example.org GHz u$s 2,000.-
2 Módulos de memorias DDR3 3x2gb GSkill 2000MHz Cas9 RIPJAWS u$s 480.-
2 Discos WD 1Tb SATA3 Negro (6Gb / s) 64 MB de búfer WD1002FAEX SATA3 u$s 280.-
1 Disco SSD GSkill Phoenix Pro de 60 GB-FM-25S2S 60GBP2 u$s 230.-
2 Enfriadores Thermalright Ultra 120 eXtreme de TRUEBKREVC Negro Rev. C u$s 200.-
4 ventiladores Scythe Kaze Corriente Ultra Slip 120mm 1900rpm 110cfm 37dBA u$s 60.-
Sapphire HD5750 1 VGA 1 GB GDDR5 Vapor-X u$s 130.-
1 Fuente CoolerMaster 1100W UCP RS-B00-AAAA-A3 u$s 400.-
1 Lectograbadora externa Asus USB SDR-08D1S-U u$s 70.-
1 Caso casero de acrílico u$s 0,00.-
Total u$s 4,450.-
Cool. Im on the look out for a new machine soon have about £2500 budget
According to google just over 3900 USD
Wow! you did all that for 4,500! Were the hell have i been wasting all my money
Never heard that word before
Portable External DVD Rewriter
I sended the engine with settings. Check your e-mail.
with your compile SF in start position runs at 13,025 compared to 1.8.1 at 12,150.kN/s.hang on did not set 16.
You are welcome.
The kn/s is not the more important.
The more important is the general performance in all analyse.
Let work for few minutes and check plies.
Compare it on SF 1.8 and 1.7.1-16; you will have more deep.
that was your settings when running at 13,025.i also am running at 4.2.
you will can 16 cores with HT ON, no good idea.
With HT OFF, only can to have 12 cores.
Set 12 cores and check with task manager, you will see working all cores.
i did all that,working fine.ignore what i said about 16 i just had a blind spot for a moment.i never use HT.
thanks again for link.
Good luck! and post your results, if you can...
btw there is also a 32 core stockfish compile but not greatly optimised.
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