Search found 4067 matches

by syzygy
Wed Apr 15, 2020 10:32 am
Forum: Computer Chess Club: General Topics
Topic: Gaviota TBs
Replies: 8
Views: 1707

Re: Gaviota TBs

Now that every other EGTB format is going deeper, can Gaviota TBs be generate for 6-man? Or is it already done and I didn't notice. I guess that 6-men should be about 1 TB, request a strong computer with at least 64 GB, run in 1-2 months. Doable but still expensive, download and store them are stil...
by syzygy
Wed Apr 15, 2020 10:27 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Almost perfect DTM tablebase
Replies: 20
Views: 2459

Re: Almost perfect DTM tablebase

DTM50 is the optimum format ... Not really. It can lead to very stupid defense, because it tries at all cost to guarantee the mate is delayed as long as possible. Even when that massively reduces the probability to get a draw through an opponent error. While in the end delaying mate in terms of the...
by syzygy
Wed Apr 15, 2020 10:15 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Almost perfect DTM tablebase
Replies: 20
Views: 2459

Re: Almost perfect DTM tablebase

I am confused about the detail of Syzygy's data sides. Can you confirm (I will use to update CPW): - does current released Syzygy EGTB have full data of all sides? Syzygy WDL is double sided, DTZ is single sided. So to know whether a 7-piece position is winning, losing or drawn (or cursed), the eng...
by syzygy
Tue Apr 14, 2020 10:14 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Almost perfect DTM tablebase
Replies: 20
Views: 2459

Re: Almost perfect DTM tablebase

BTW, DTZ50 is better for winning but not much. Fake mate announcements aren't very nice if one pretends to have "perfect" information (but I guess one could just change the rules of chess, as ICCF did...). WDL50+ is a bit bigger than plain WDL would be, but I decided it was worth it. Indeed DTZ50+ ...
by syzygy
Tue Apr 14, 2020 9:55 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: syzygy, phantom & best move
Replies: 2
Views: 292

Re: syzygy, phantom & best move

Hi, Fathom (the jdart version) returns for 8/8/8/3k4/p7/2K5/P7/7r b - - 0 95 the following winning moves: Ke4, Kc5, Ke5, Kc6, Kd6, Ke6, Ra1, Rb1, Rc1, Rd1, Re1, Rf1, Rg1, Rh2, Rh3, Rh4, Rh5, Rh6, Rh7, Rh8, a3 How do I know which one of these to pick? Because my program (Micah) apparently lost (well...
by syzygy
Tue Apr 14, 2020 9:47 pm
Forum: Computer Chess Club: General Topics
Topic: Gaviota TBs
Replies: 8
Views: 1707

Re: Gaviota TBs

Hi, The Gaviota TBs are available in different compression formats: https://github.com/michiguel/Gaviota-Tablebases/tree/master/gtb There is .cp1, .cp2, .cp3 and .cp4. https://github.com/michiguel/Gaviota-Tablebases/tree/master/compression lists four compression methods. Do you know which compressi...
by syzygy
Wed Apr 08, 2020 1:50 pm
Forum: Computer Chess Club: General Topics
Topic: Is the website down? http://tablebase.sesse.net
Replies: 13
Views: 868

Re: Is the website down? http://tablebase.sesse.net

just the recommended Get them All extension. Recommended by whom exactly? On sesse.net, I don't see such a recommendation. I think you have been nullrouted because you didn't respect the big note right at the top. He explicitly wrote that he did not use a download accelerator. The purpose of using ...
by syzygy
Thu Mar 19, 2020 7:46 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Strange sporadic speed limitation in engine running in Linux on Ryzen
Replies: 19
Views: 2795

Re: Strange sporadic speed limitation in engine running in Linux on Ryzen

So the slow original binary got from 2.04 mnps to 2.15 mnps after this "drop_caches" while the fast copy went from 2.15 mnps to even faster 2.17mnps (which may be inside normal error margin). My explanation for what you are seeing is that the binary is sometimes loaded into memory in a way that giv...
by syzygy
Thu Mar 19, 2020 7:09 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Turning off 50-move draw rule in Stockfish & other engines
Replies: 42
Views: 3758

Re: Turning off 50-move draw rule in Stockfish & other engines

You might give Moonfish a try. https://github.com/joergoster/Moonfish If you set "Syzygy50MoveRule" to false, this will also switch it off for the search. Thanks Joerg. Do you know when using “regular” Stockfish if you turn off the Syzygy50Moverule does the main program still enforce the 50-move-ru...
by syzygy
Tue Mar 17, 2020 11:56 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Turning off 50-move draw rule in Stockfish & other engines
Replies: 42
Views: 3758

Re: Turning off 50-move draw rule in Stockfish & other engines

You might give Moonfish a try. https://github.com/joergoster/Moonfish If you set "Syzygy50MoveRule" to false, this will also switch it off for the search. Thanks Joerg. Do you know when using “regular” Stockfish if you turn off the Syzygy50Moverule does the main program still enforce the 50-move-ru...