Search found 100 matches

by mbabigian
Mon Mar 18, 2019 4:34 pm
Forum: Computer Chess Club: General Topics
Topic: PCI express 4
Replies: 5
Views: 763

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: 763

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: 1723

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: 5655

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 ...
by mbabigian
Fri Jan 25, 2019 8:44 pm
Forum: Computer Chess Club: General Topics
Topic: LC0 bad search and poor tactics
Replies: 45
Views: 5655

Re: LC0 bad search and poor tactics

Chess in essence is a positional game while shallow tactics are just shortcuts to finish a game quicker. Of course missed tactics can destroy a game in one move sometimes, but I think you have to understand than NN chess is still in its infancy and there at the moment it plays chess totally differe...
by mbabigian
Fri Jan 25, 2019 7:57 pm
Forum: Computer Chess Club: General Topics
Topic: LC0 bad search and poor tactics
Replies: 45
Views: 5655

Re: LC0 bad search and poor tactics

I have moved zero goal posts -thank you. You can rail at the moon all you like and it doesn't change that a 1 node search doesn't "solve tactics." A typical queen sacrifice tactical position will not be "solved" by looking at all of the legal moves one side can play and getting a NN opinion back. Th...
by mbabigian
Fri Jan 25, 2019 6:35 pm
Forum: Computer Chess Club: General Topics
Topic: LC0 bad search and poor tactics
Replies: 45
Views: 5655

Re: LC0 bad search and poor tactics

Saying that they do zero tactics of any type (i.e., "don't do tactics period"), however, is perhaps a bit too much hyperbole :D Also nonsense. Looking at positional patterns, there are certain patterns that lend themselves to tactics. This is the whole reason human players practice tactical puzzles...
by mbabigian
Fri Jan 25, 2019 6:24 pm
Forum: Computer Chess Club: General Topics
Topic: LC0 bad search and poor tactics
Replies: 45
Views: 5655

Re: LC0 bad search and poor tactics

Since you wanted to add analysis time to SF by putting it on one thread when 4 core cpus are ubiquitous, for giggles I did something similar. I put SF on my 9 year old PC after 10. Ba3. It initially considered Nc6 then considered f6 until it reached a terrifyingly long 5 seconds before permanently r...
by mbabigian
Fri Jan 25, 2019 5:20 pm
Forum: Computer Chess Club: General Topics
Topic: LC0 bad search and poor tactics
Replies: 45
Views: 5655

Re: LC0 bad search and poor tactics

Nonsense. If you want to put your blinders on and only examine e4, that's sad in itself. The tactics get easier and frankly the moves more ridiculous as you move through the line. That is why I posted so many moves and not a FEN. Not finding e4 is a minor infraction as dxc4 is playable. The blunders...
by mbabigian
Fri Jan 25, 2019 5:19 am
Forum: Computer Chess Club: General Topics
Topic: LC0 bad search and poor tactics
Replies: 45
Views: 5655

Re: LC0 bad search and poor tactics

Speed is relevant in games. This was analysis. Some positions were a million, others tens of millions of nodes. Various networks from the 30 series we're used. Probably tried half a dozen to see if any were better. I find it more fascinating that you find getting those particular questions answered ...