Search found 538 matches

by chrisw
Sat Jun 08, 2019 4:14 pm
Forum: Computer Chess Club: General Topics
Topic: Leela, such a great engine (and innovation)?
Replies: 36
Views: 2013

Re: Leela, such a great engine (and innovation)?

How much money in USDs would I have to spend to have TCEC 15 lczero play on a computer at home? i5 + 2080ti + 2080 + 32GB RAM + accessories, about $2500 or so. Cheaper than you get SF to play at TCEC level. And if TCEC will keep the same conditions, Leela will demolish SF in SuFi 16. and don’t skim...
by chrisw
Sat Jun 08, 2019 4:05 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Hash collision?
Replies: 42
Views: 1429

Re: Hash collision?

So.. going back to my original posting, here's my data. What do people think about the probability of hash collisions causing strange evals and moves? 1. Time control 40 moves in 25 minutes 2. Searching approx 2 million NPS 3. Size of hash table, 2097152, with 4 buckets 4. Using a 64 bit int for th...
by chrisw
Fri Jun 07, 2019 8:00 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Hash collision?
Replies: 42
Views: 1429

Re: Hash collision?

Puzzle. Suppose a search takes X nodes and the hashtable is 2^n in size. You would like to be 95% confident no two nodes have a hash collision. What’s the formula connecting X and n? This will occupy my mind for days and in the end I won't be able to solve it, thank you very much. it’s similar to t...
by chrisw
Fri Jun 07, 2019 2:43 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Hash collision?
Replies: 42
Views: 1429

Re: Hash collision?

Puzzle. Suppose a search takes X nodes and the hashtable is 2^n in size. You would like to be 95% confident no two nodes have a hash collision.

What’s the formula connecting X and n?
by chrisw
Thu Jun 06, 2019 2:26 pm
Forum: Computer Chess Club: General Topics
Topic: Is AlphaZero-LC0 (Leela0) A chess Engine?
Replies: 31
Views: 3285

Re: Is AlphaZero-LC0 (Leela0) A chess Engine?

Do you know the mean error between the actual output of the value head and the target train value? That would be dependent on the exact net you choose to examine, as well as the specific data you are comparing against. Also, not really relevant to his question or my response. Ok, so you don’t know ...
by chrisw
Thu Jun 06, 2019 7:54 am
Forum: Computer Chess Club: General Topics
Topic: Question for Nelson Hernandez - TCEC power consumption
Replies: 11
Views: 770

Re: Question for Nelson Hernandez - TCEC power consumption

Seriously, I've been trying to get an answer on this question for close to a year now. Somebody must have some kind of measurement of this thing. Anyone? TCEC, two machines, 1) CPU-centric, 2) GPU-centric. What is the electricity draw of machine 1, machine 2? GPU-Z will graph you power draw, usage,...
by chrisw
Wed Jun 05, 2019 7:43 pm
Forum: Computer Chess Club: General Topics
Topic: Is AlphaZero-LC0 (Leela0) A chess Engine?
Replies: 31
Views: 3285

Re: Is AlphaZero-LC0 (Leela0) A chess Engine?

It does not work like that. It starts with the rules of the game. It does self play to learn what things are good and what things are bad. It is not memorizing board positions. It writes out a file of numbers called a network that contains the values for different board features. It uses this netwo...
by chrisw
Sun Jun 02, 2019 3:28 pm
Forum: Chess Players Forum
Topic: Coffee house player
Replies: 7
Views: 251

Re: Coffee house player

Hi, Who is a "coffee house player" ? Well, me, once upon a time .... https://www.gettyimages.fr/detail/photo-d'actualité/patrons-of-the-prompt-corner-cafe-in-highgate-enjoy-photo-dactualité/103095306 So you gave up coffee house playing, what about the rest of coffee house players ? The Eastern Euro...
by chrisw
Sat Jun 01, 2019 7:07 pm
Forum: Chess Players Forum
Topic: Coffee house player
Replies: 7
Views: 251

Re: Coffee house player

Look wrote:
Sat Jun 01, 2019 1:03 pm
Hi,

Who is a "coffee house player" ?
Well, me, once upon a time ....

https://www.gettyimages.fr/detail/photo ... /103095306
by chrisw
Thu May 30, 2019 8:48 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: One idea to solve chess?
Replies: 35
Views: 5070

Re: One idea to solve chess?

I think that if you want to solve chess then you should try to solve. chess engines of today do not try to solve the game and when they say 0.00 people have no idea if they found a forced draw or simply found a line that they evaluate as equal. That’s easily dealt with. Use bit zero to distinguish ...