Search found 883 matches

by Ras
Thu Sep 15, 2016 9:28 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Center control--
Replies: 5
Views: 1150

Re: Center control--

My evaluation checked if center pawns were both weak and blocked. OK, but whom do you give a penalty? In the CT800, it is only the computer that gets a penalty for a blocked centre, regardless which side it plays. Blocked is not only pawn on pawn on the same line, but also inability to push a pawn ...
by Ras
Thu Sep 15, 2016 7:48 pm
Forum: Computer Chess Club: General Topics
Topic: What is the secret of Zappa?
Replies: 14
Views: 3673

Re: What is the secret of Zappa?

I think vs. the opponents we have today Zappa is around 50 Elo stronger as vs. the opponents we have at the time engine is available (2008). Very unusual. It must be a secret in Zappa! If I remember correctly, modern programs become dumber and dumber, but search deeper and deeper. So it may be that...
by Ras
Thu Sep 15, 2016 7:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Center control--
Replies: 5
Views: 1150

Re: Center control--

You often read in books that if you occupy or control the center an attack on your king can not be successful. As a rule of thumb, this is correct - but it is not the centre control itself that is the point here. Rather it is the counter-attack in the centre, and that has to be carried out before t...
by Ras
Thu Sep 15, 2016 7:05 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Starting with move ordering.
Replies: 49
Views: 8477

Re: Starting with move ordering.

Some notes on the move sorting: 1) many programs don't actually sort the moves in the sense that they would generate a sorted move list from the previously unsorted one. Instead, they do a selection sort. Means, they: - go through the full unsorted move list - pick up the move with the highest assoc...
by Ras
Wed Sep 14, 2016 7:04 pm
Forum: Computer Chess Club: General Topics
Topic: Computer opening disappeared ?
Replies: 3
Views: 884

Re: Computer opening disappeared ?

That opening is known by many names like Van Geet, but it has never been popular because it doesn't do much. The winning percentage for white is even less than 50%, according to Wikipedia. So I guess computers don't play it anymore because they have become stronger. Here the search for the CT800 in ...
by Ras
Wed Sep 14, 2016 6:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Black pawns are thick
Replies: 6
Views: 1504

Re: Black pawns are thick

Henk wrote:But at the end when I created the black pawn by copying the white pawn it looked much thicker than the white pawn.
That's harmless compared to the drama you'll get when you'll arrive at the queens.
by Ras
Thu Sep 08, 2016 7:31 pm
Forum: Computer Chess Club: General Topics
Topic: new chess computer: CT800
Replies: 29
Views: 5733

Re: new chess computer: CT800

thank you Fernando; what I agree with is that the design of the prototype isn't actually appealing. It looks more like a medical lab device where you insert some probe at the backside. I had to use what I could get in terms of available electronics housings. Plus that I am not good at visual design ...
by Ras
Thu Sep 08, 2016 5:40 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Root search
Replies: 5
Views: 1675

Re: Root search

NG-Play (and thus the CT800) uses NegaScout in the normal search, but a stripped down NegaLight at the root. The moves are generated, ordered per LVVV/MVA. In the CT800, but not in NG-Play, a first search at depth=1 plus quiescence is done for refining the move sorting. Doesn't cost much time and he...
by Ras
Thu Sep 08, 2016 5:05 pm
Forum: Computer Chess Club: General Topics
Topic: FF 48.02 and huge tables at GoogleDrive (XB/UCI chronology)?
Replies: 11
Views: 1282

Re: FF 48.02 and huge tables at GoogleDrive (XB/UCI chronolo

Loading is quick, some seconds or so (my line is at 12 Mbit). Scrolling in the first table is easy. However, clicking on "country code", FF becomes unresponsive and finally offers to abort some running script.

FF 45.3.0 ESR here.
by Ras
Thu Sep 08, 2016 1:22 am
Forum: Computer Chess Club: General Topics
Topic: CFish
Replies: 76
Views: 21628

Re: CFish

In general, I would like to be able to compile Cfish from an IDE That's not the best idea for a couple of reasons, which is why makefiles or buildscripts are usually the preferred solution. - People use many different IDEs on many different operating systems. Including build instructions for any po...