Getting rid of the 50 move rule

Discussion of anything and everything relating to chess playing software and machines.

Moderators: hgm, Rebel, chrisw

Arpad Rusz
Posts: 273
Joined: Sat Apr 17, 2010 2:34 pm
Location: Budapest

Getting rid of the 50 move rule

Post by Arpad Rusz »

Do you know an engine which can be set to always ignore the 50 move rule and not only in the Syzygy TB's? If I am not mistaken, after switching of the Syzygy50MoveRule UCI option in Stockfish, the engine still uses the rule.
syzygy
Posts: 5566
Joined: Tue Feb 28, 2012 11:56 pm

Re: Getting rid of the 50 move rule

Post by syzygy »

Arpad Rusz wrote:Do you know an engine which can be set to always ignore the 50 move rule and not only in the Syzygy TB's? If I am not mistaken, after switching of the Syzygy50MoveRule UCI option in Stockfish, the engine still uses the rule.
You are not mistaken.

If you are able to compile Stockfish from source, then simply delete lines 1073 and 1074 in position.cpp:
https://github.com/official-stockfish/S ... 1073-L1074

Of course you might want to use Cfish instead, in which the TB/multipv problem that you raised quite a while ago has been fixed. (It turned out to be easier to fix than I had initially thought.)

In Cfish, remove these lines:
https://github.com/syzygy1/Cfish/blob/f ... 1404-L1408

In Cfish disabling the 50-move rule might give problems if you play a game that exceeds the 50-move rule. But analysing positions should work fine.
User avatar
Nordlandia
Posts: 2821
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: Getting rid of the 50 move rule

Post by Nordlandia »

Ronald

If you have time, please make it possible to generate syzygy in DTM format.

I find depth to mate format very useful for Fritz Let's Check Database
i.e engine valuations get cached with exact distance to mate.

In my case, 5-men is good enough to start with.
syzygy
Posts: 5566
Joined: Tue Feb 28, 2012 11:56 pm

Re: Getting rid of the 50 move rule

Post by syzygy »

Nordlandia wrote:If you have time, please make it possible to generate syzygy in DTM format.
Stop stalking me now. Thanks.
Arpad Rusz
Posts: 273
Joined: Sat Apr 17, 2010 2:34 pm
Location: Budapest

Re: Getting rid of the 50 move rule

Post by Arpad Rusz »

Thanks, Ronald!