Search found 4068 matches

by syzygy
Sun Feb 09, 2020 10:12 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: hash collisions
Replies: 370
Views: 28922

Re: hash collisions

It is just too easy to implement this and solve the problem until you reach the search speeds where 64 bits fails to provide reasonable hash signatures. We are a LONG way from that point today. 64 bits are not a lot nowadays at all. With 16 bytes per entry and a 64 GB hash, you need 32 bits to inde...
by syzygy
Sun Feb 09, 2020 10:06 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: hash collisions
Replies: 370
Views: 28922

Re: hash collisions

I think lockless hashing was pretty safe at modest number of threads most people have removed the need for legality checking of the hash move. Now it may be necessary to bring that back in. So it looks like the SF devs were right when they decided not to store the full hash key in the TT (currently...
by syzygy
Thu Feb 06, 2020 12:02 am
Forum: Computer Chess Club: General Topics
Topic: DTM data is missing in 6 or 7 syzygy tablebases
Replies: 4
Views: 739

Re: DTM data is missing in 6 or 7 syzygy tablebases

I am not clear how the website is even getting/outputting DTM info. The problem with DTM is that with the 50-move rule it is dependent on the game history. But "DTM" ignores the 50-move rule, doesn't it? It'd need to be "DTM50" to include the 50-move rule, and no one's done that so far. Is the webs...
by syzygy
Wed Feb 05, 2020 11:57 pm
Forum: Computer Chess Club: General Topics
Topic: strange data about DTZ for mate in 2 positions
Replies: 2
Views: 501

Re: strange data about DTZ for mate in 2 positions

jp wrote:
Thu Jan 30, 2020 10:51 pm
Uri, do you think this thread has anything to do with it?

http://www.talkchess.com/forum3/viewtop ... =7&t=58488
Yes, it does.
by syzygy
Thu Jan 09, 2020 12:00 am
Forum: Computer Chess Club: General Topics
Topic: Syzygy Problem
Replies: 5
Views: 832

Re: Syzygy Problem

So the Fritz GUI is buggy.

Either let the engines, not the GUI, play the TB moves, or let the GUI immediately adjudicate the game once a TB position is reached. It makes no sense to let the GUI take over and mess up the game.
by syzygy
Wed Dec 25, 2019 7:56 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Suicide chess tablebases (stalemated player wins)
Replies: 40
Views: 10614

Re: Suicide chess tablebases (stalemated player wins)

I have also added a generator for atomic chess just in case someone is interested. Hi, does the TB generator here https://github.com/syzygy1/tb for Atomic Chess support 7 men generation for Atomic Chess? I would like to generate certain 7 men TBS if possible so i wonder if it supports them. I think...
by syzygy
Sat Dec 07, 2019 8:07 pm
Forum: Computer Chess Club: General Topics
Topic: stockfish 10 vs. Mephisto III S Glasgow
Replies: 116
Views: 14364

Re: stockfish 10 vs. Mephisto III S Glasgow

This is really not AI but instead artificial stupidity. The progress you've made in about 8 months in this thread disproves the existence of HI. My part on this posting is mainly to quote the source: https://glarean-magazin.ch/2019/04/18/kuenstliche-schach-intelligenz-leela-chess-zero-projekt-lc0-c...
by syzygy
Tue Dec 03, 2019 10:48 pm
Forum: Computer Chess Club: General Topics
Topic: stockfish 10 vs. Mephisto III S Glasgow
Replies: 116
Views: 14364

Re: stockfish 10 vs. Mephisto III S Glasgow

mclane wrote:
Tue Dec 03, 2019 7:39 pm
This is really not AI but instead artificial stupidity.
The progress you've made in about 8 months in this thread disproves the existence of HI.
by syzygy
Tue Dec 03, 2019 10:43 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Include 4men syzygy in an engine
Replies: 11
Views: 2234

Re: Include 4men syzygy in an engine

With this changes the probing code gives wrong results, what have I missed? Are there other parts of code to change? Do you have a version of your program that works without the changes you made (so that mmaps() the files into memory when needed)? If you do, then it should be relatively easy to fin...
by syzygy
Mon Nov 04, 2019 11:06 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Sysygy Shatranj?
Replies: 4
Views: 1556

Re: Sysygy Shatranj?

Would it be trivial to adapt the Syzygy EGT generator for Shatranj? Or would it be easier to just write a dedicated generator for that? I am only interested in the WDL statistics of a few specific 6-men end-games (KRFE-KR and KFF-KFE). I don't need the tables itself, so I don't care about compressi...