Search found 7593 matches

by Dann Corbit
Sat Jan 19, 2019 7:08 am
Forum: Computer Chess Club: General Topics
Topic: CPU clock speed or core count ?
Replies: 4
Views: 167

Re: CPU clock speed or core count ?

It also depends on what you are doing with the engines. For instance, when I use my 64 core machine to analyze, I usually do not use 60+ cores on a single position at a time. Instead, I break the file to be analyzed into a collection of sub-files and then divide the thread count appropriately. So, s...
by Dann Corbit
Sat Jan 19, 2019 5:18 am
Forum: Computer Chess Club: General Topics
Topic: program to generare epd file of tactical exercises from pgn
Replies: 13
Views: 235

Re: program to generare epd file of tactical exercises from pgn

Here is an example that is easy for computers but not for weak humans(the woman with white solved it correctly). 2b2rk1/1p4b1/3p3p/3Pnpq1/1P1Np3/1Q2P1P1/3N1nB1/B1R3K1 w - - 0 23 find the best move for white. Is there a best move if all move choices lose? I think the game is already lost at that poi...
by Dann Corbit
Sat Jan 19, 2019 3:40 am
Forum: Computer Chess Club: General Topics
Topic: Fairymax is using 25% of cpu
Replies: 7
Views: 271

Re: Fairymax is using 25% of cpu

My machine has 2 cores and I do not have ponder enabled. Perhaps I will not be able to use Fairymax as an opponent as it really slows my system down. Thanks for your response. If you know of another linux-compatible chess engine that has an elo in the 1200-1500 area perhaps you could suggest one. G...
by Dann Corbit
Fri Jan 18, 2019 11:50 pm
Forum: Chess Players Forum
Topic: Could this be the best game of all time by a Female Player?
Replies: 12
Views: 270

Re: Could this be the best game of all time by a Female Player?

The problem of Hou yifan is not playing against weak opponents. Hou Yifan does not do well enough against strong opponents to increase her rating. Maybe it is because she does not invest a lot of time on chess but the facts are that hou Yifan is clearly weaker than the level that Judit Polgar got i...
by Dann Corbit
Fri Jan 18, 2019 11:36 pm
Forum: Computer Chess Club: General Topics
Topic: program to generare epd file of tactical exercises from pgn
Replies: 13
Views: 235

Re: program to generare epd file of tactical exercises from pgn

Here is an example that is easy for computers but not for weak humans(the woman with white solved it correctly). 2b2rk1/1p4b1/3p3p/3Pnpq1/1P1Np3/1Q2P1P1/3N1nB1/B1R3K1 w - - 0 23 find the best move for white. Is there a best move if all move choices lose? I think the game is already lost at that poi...
by Dann Corbit
Fri Jan 18, 2019 11:32 pm
Forum: Computer Chess Club: General Topics
Topic: Fairymax is using 25% of cpu
Replies: 7
Views: 271

Re: Fairymax is using 25% of cpu

How many cores does your system have? I guess that Fairymax is not SMP, so I would expect it to use 25% of the CPU on a 4 core system. Now, if you have long time control and FairyMax is using CPU during the opponents turn, check to see if there is a UCI setting for Ponder and turn it off if there is...
by Dann Corbit
Fri Jan 18, 2019 11:29 pm
Forum: Computer Chess Club: General Topics
Topic: Can somebody explain what makes Leela as strong as Komodo?
Replies: 50
Views: 2152

Re: Can somebody explain what makes Leela as strong as Komodo?

In order to use GPUs with standard chess, better recursion is important. It is already partially addressed. The most important thing is memory access. If the CPU can use the GPU video RAM directly instead of copying back and forth (there are some model systems that do that) then both CPU and GPU can...
by Dann Corbit
Fri Jan 18, 2019 9:06 pm
Forum: Computer Chess Club: General Topics
Topic: Looking for a tactical test suite
Replies: 11
Views: 328

Re: Looking for a tactical test suite

It is incredibly difficult to produce a tactical test suite with 1000 positions which is thoroughly debugged. Even 100 positions is rather difficult. For instance, what if the line is confirmed by several top engines ? I have done that. I worked with Swaminathan in verification of the STS test suit...
by Dann Corbit
Fri Jan 18, 2019 7:20 pm
Forum: Computer Chess Club: General Topics
Topic: program to generare epd file of tactical exercises from pgn
Replies: 13
Views: 235

Re: program to generare epd file of tactical exercises from pgn

You can easily turn a chess game into EPD records with pgn2fen <file.pgn> -e -l > <file.epd> Now you can take a chess engine, or series of chess engines and analyze the whole game a ply at a time on multi-pv. Something to watch for is a jump in eval from one ply to the next. That always means either...
by Dann Corbit
Fri Jan 18, 2019 7:17 pm
Forum: Computer Chess Club: General Topics
Topic: AMD Ryzen 3000 Series CPUs
Replies: 9
Views: 850

Re: AMD Ryzen 3000 Series CPUs

I hope to buy the Ryzen Threadripper 3990wx (64 cores 8-) ). Supposedly, you can pair the 3990wx So 128 cores, 256 threads. Would be very interesting to run LC0 on CPU with 64 or 128 cores. 3250 elo? I am guessing that 3 high end GPUs would be much stronger than the 128 standard CPU cores for LC0, ...