Search found 106 matches

by mbabigian
Wed Dec 11, 2019 6:11 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: I bought a stop-gap machine
Replies: 27
Views: 937

Re: I bought a stop-gap machine

That's not bad. I should move to Montana, only 4.5c there!
by mbabigian
Wed Dec 11, 2019 4:37 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: I bought a stop-gap machine
Replies: 27
Views: 937

Re: I bought a stop-gap machine

The issue with RAM is simply a lack of large compatible modules. I plan to build with 256GB, but only know of one brand with 32GB sticks currently for threadripper boards. Fortunately G.skill has announced faster large modules to ship late this month. I'm waiting for that and a couple other things t...
by mbabigian
Mon Nov 25, 2019 9:15 pm
Forum: Computer Chess Club: General Topics
Topic: 32 core Threadripper about 100M NPS
Replies: 16
Views: 1222

Re: 32 core Threadripper about 100M NPS

https://www.tomshardware.com/reviews/amd-threadripper-3970x-review Now that they are here, give it a couple months to see if there are any issues with the new chips or MOBOs. Whining about the early pains of every new release gets old. Personally I'm waiting for 3990X official pricing before making ...
by mbabigian
Sat Nov 16, 2019 8:52 pm
Forum: Computer Chess Club: General Topics
Topic: What is the purpose of chess engines?
Replies: 88
Views: 3844

Re: What is the purpose of chess engines?

Right now LC0 is a tactical failure. If you are looking only for engine improvements, work on search. Perhaps AB rollouts to augment MCTS like tried in Komodo. Perhaps this can also keep additional CPU cores loaded. As it stands now LC0 cannot be trusted for analysis alone without tactical checks wi...
by mbabigian
Sat Nov 16, 2019 5:09 pm
Forum: Computer Chess Club: General Topics
Topic: What is the purpose of chess engines?
Replies: 88
Views: 3844

Re: What is the purpose of chess engines?

Opening prep and analyzing complex quiet positions. Opening prep is not just about finding novelties. I look for lines where the required moves look somewhat counterintuitive and have long sequences of "only moves." Let me clarify "only moves." I'm not talking about moves necessary to avoid instant ...
by mbabigian
Thu Oct 24, 2019 3:00 pm
Forum: Computer Chess Club: General Topics
Topic: Ryzen problems - AGAIN!
Replies: 16
Views: 1514

Re: Ryzen problems - AGAIN!

Many of these complaints are self-inflicted. The problems the OP complains of are old as computers themselves. Some people learn from history some don't but the computer industry is perfectly consistent. Back when I ran PCDOS I noticed that when a new version came out, early adopters got burned ever...
by mbabigian
Mon Mar 18, 2019 4:34 pm
Forum: Computer Chess Club: General Topics
Topic: PCI express 4
Replies: 5
Views: 842

Re: PCI express 4

Latency of flash reads are the bottleneck (iops at queue depth 1) not bandwidth over the bus. Won't make any difference with current flash speeds.
by mbabigian
Mon Mar 18, 2019 2:56 pm
Forum: Computer Chess Club: General Topics
Topic: PCI express 4
Replies: 5
Views: 842

Re: PCI express 4

It is my understanding that the only card slightly pinched by the pcie 3.0 spec is the 2080 TI. "If" NVidia makes a new card with the 4.0 spec, their flagship will get a small boost.

I doubt it will make a significant impact for chess.
by mbabigian
Wed Feb 27, 2019 8:52 pm
Forum: Computer Chess Club: General Topics
Topic: 2950x SMT ON and SMT OFF
Replies: 13
Views: 1916

Re: 2950x SMT ON and SMT OFF

How many positions did you use and how many times did you run each position to calculate the time to depth figure?
by mbabigian
Sun Jan 27, 2019 6:40 pm
Forum: Computer Chess Club: General Topics
Topic: LC0 bad search and poor tactics
Replies: 45
Views: 6353

Re: LC0 bad search and poor tactics

One interesting note on the search after reading more about it. If I understand correctly what I was reading on the discord, they implemented a dynamic CPUCT where the value changes to prune more heavily as search deepens. This is similar to AB engines which also prune more heavily at deeper depths ...